Operating Manual UT108/109 Handheld Automotive Multi
Contents
1. 1 Insert the red test lead into the Hz terminal and the black test lead into the COM terminal 2 Under AC DC voltage DC millvoltage or AC DC current measurement press Hz button to select frequency measurement mode the measured value shows on the display Press RANGE to select next range the maximum range is 1MHz Note e Input Amplitude Refer to accuracy specifications e When frequency measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the testing leads away from the input terminals of the Meter 38 UT108 109 OPERATING MANUAL Figure 11 39 UT108 109 OPERATING MANUAL 1 Temperature Measurement UT109only See figure 12 A Warning To avoid harm to yourself do not input higher than DC 60V or AC 30V voltages To measure temperature connect the Meter as follows 1 Set the rotary switch to C F Press BLUE button to select temperature measurement mode 2 Insert the temperature probe into the input terminal as shown on the figure 12 3 Place the temperature probe to the object being measured After few seconds the measured value shows on the display 4 Press BLUE button to toggle between and F temperature Note e To avoid measurement error especially low temperature measurement the operating temperature must not exceed 18 23 C e When temperature measurement has been completed disconnect the connection between the temperatu2. RANGE e Under RPM or Dwell testing mode press RANGE to select 4CYL 6CYL or 8CYL SELECT Press SELECT to select the alternate functions 17 UT108 109 OPERATING MANUAL E ES max A 668 CYL m as 04 EEE rt e Auto Manual 840001 DWL RPMx10 Figure 3 18 UT108 109 OPERATING MANUAL 1 Data output is in progress 2 The battery is low A Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears 3 maximum or minimum reading displayed 4 4CYL 6CYL or 8CYL displayed 5 Test of continuity 6 Indicates for DC voltage or current 7 Indicates for AC voltage or current 8 Indicates for dangers 9 Data hold is active 10 The meter is in the auto range mode 11 The meter is in the auto range mode 12 Indicates for 841000mV range 13 Test of DWLL 14 Test of RPM 15 Indicates for units 19 UT108 109 OPERATING MANUAL Measurement Operation Part 1 Multimeter Basic Testing A ACIDC Voltage Testing see figure 4 A Warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltages higher than 1000Vp although readings may be obtained Please take extra care when measuring high voltages to avoid electric shock To measure DC voltage connect the Meter as follows 1 Insert the red test
3. Read the ignition dwell of the tested automobile directly from the display 42 UT108 109 OPERATING MANUAL Ignition Coil Figure 13 43 UT108 109 OPERATING MANUAL K Engine Tach Rotation Speed Testing RPMx10 see figure 14 The RPM means the rotating frequency of the main shaft of the engine per minute 1 wm Set the rotary switch to RPM X10 DWELL Press RANGE button to select the number of cylinders and press BLUE button to select RPM X10 measurement mode Insert the red test lead into the V terminal and the black one into the COM terminal Select an appropriate number of cylinders Connect the ends to be tested as illustrated If a DIS ignition system without any distributor board is used in the automobile connect the red test lead probe to the TACH tachometer signal line which is connected to the computer DIS module of the automotive engine Refer to the automotive servicing manual for the specific position If an ignition system with a distributor board is used in the automobile connect the red test lead probe to the primary negative end of the ignition coil Refer to the automotive servicing manual for the specific position Connect the black test lead probe to the good ground terminal of the automobile Upon the start of the engine or during its operation test the rotation speed of the engine and read the displayed value from the display The actual rotation speed of the automobile to be t
4. primary pole Refer to various kinds of automotive manuals for the details 57 UT108 109 OPERATING MANUAL 7 The primary resistance is generally in a range of 6 kQ to 30 kQ Refer to various kinds of automotive manuals for the details 8 For a heater ignition coil repeat the said testing steps A Warning For a heater ignition coil the resistance may be a little higher because the resistance of a coil will vary with the temperatures The higher the temperature the resistance will be higher on the contrary it will become lower 58 UT108 109 OPERATING MANUAL Secondary Coil Cylindrical Ignition Coil Figure 16 59 UT108 109 OPERATING MANUAL 2 Ignition System High Voltage Damper Testing see figure 17 1 Move the connectors of the ignition system from the engine Refer to the ignition system movement procedure in various kinds of automotive manuals for the details A Warning Some of Chrysler s products use a spark plug high voltage damper with positive lock end electrodes which can only be moved out of the distributor board If it is moved out of anywhere else some damage will result Refer to various kinds of automotive manuals for the details 2 Set the rotary switch to the Insert the red test lead into the terminal and the black one into the COM terminal 3 Connect the red and black test lead probes in parallel to the two ends of the high voltage damper and observe t
5. If it is within the range the starting system is normal on the contrary it is shown that there may be something wrong with the battery cable starting system cable starting solenoid or starting motor Voltage Temperature 9 6 V or more 21 10 70 F 9 5V 15 6 C 60 9 4 V 10 0 C 50 9 3V 44 C 40 9 1V 1 1C 30 8 9V 6 7 C 20 F 8 7V 12 2 C 10 8 5V 17 8C OF 53 UT108 109 OPERATING MANUAL G Voltage Drop Testing Test the voltage drops caused by the switch cable solenoid or connector Any abnormal voltage drop generally results from an additional resistance The resistance will restrict the currents upon the start of the engine leading to the reduction of the load voltage of the battery and the slow down of the start of the engine 1 Cut off the ignition system so as to disable the start of the automobile Cut off the main ignition coil shunt coil cam and starting sensor so as to cut off the ignition system Operate by reference to the automotive manual 2 Set the rotary switch to DCmV or DCV Insert the red test lead into the A terminal and the black test lead into the COM terminal 3 Refer to the LOSS typical trigger voltage circuit See figure 15 Test the voltage between any of the following pairs of points respectively 182 283 4 amp 5 586 6 amp 7 788 889 8810 Component Voltage Switch 300 mV Lead 200 mV Grounding 100 mV Battery
6. electrodes and in turn lead to any personal injury or damage to a tool or battery Smoking or striking a light near the automobile is prohibited Pay attention to ignition coil an ignition lead or a spark plug socket because these components are provided with high voltages when the automobile is operating To connect or cut off an electronic component close the ignition lock Pay attention to the automotive producer s cautions notes and servicing procedures All the information explanations and detailed descriptions in the operation manual have originated from the industrial information recently published It is impossible to prove the accuracy and completeness of the information of which we shall not be responsible for the assumption A The data of the automotive servicing manual have originated from the automotive servicing information 1 Contact the local distributors of automotive components 11 UT108 109 OPERATING MANUAL 2 Contact the local retailers of automotive components 3 Contact the local libraries to look up any book for the proofreading of your automotive servicing manual so as to provide you with the latest information B before the diagnosis of any trouble opens the engine hood to make a thorough visual inspection You will find the causes for many of your problems to be solved which will save you a lot of time 1 Has the automobile recently been serviced Has the same problem sometimes occurred where the trouble
7. lead into the V terminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriate measurement position in press BLUE button to switch between AC and DC measurement mode 3 AC voltage measurement display true rms value and press Hz button to obtain the frequency value input amplitude and frequency response refer to accuracy specifications 4 Connect the test leads across with the object being measured The measured value shows on the display 20 UT108 109 OPERATING MANUAL Note If the value of voltage to be measured is unknown use the maximum measurement position 1000V and reduce the range step by step until a satisfactory reading is obtained Please take extra care when measuring high voltages to avoid electric shock In each range the Meter has an input impedance of approx 10MQ this loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10kQ the error is negligible 0 1 or less When voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the testing leading away from the input terminals of the meter 21 UT108 109 OPERATING MANUAL Figure 4 22 UT108 109 OPERATING MANUAL B DC millvoltage Testing see figure 5 A Warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltage
8. lt uses for selecting the required measurement function when there is more than one function at one position of the rotary switch R Automatic power off The meter power off automatically if you have not changed the rotary switch or pressed a button for 15 minutes 47 UT108 109 OPERATING MANUAL Part 2 Diagnosis of Automotive Troubles The Meter is a tool for the very effective diagnosis of the troubles with the electronic systems of the automobile This part gives a special introduction as to how the Meter is used to diagnose any trouble with a fuse switch solenoid relay starting and charging systems ignition system fuel system and engine sensor A Fuse Testing Check the fuse to see if it is blown out 1 Set the rotary switch to Q 2 Insert the red test lead into the Q terminal and the black one into the COM terminal 3 Short circuit the red and black test lead probes when the reading of the meter should be displayed between 0 2 and 0 5 Q If it is more than 0 5 check the test leads to see whether they are well connected 4 Connect the red and black test lead probes in parallel to the two ends of the fuse when the reading of the meter should be displayed less than 10 Q indicating that the fuse is good When the display is overload OL it is shown that the fuse has been blown out A Warning It must be replaced with a fuse of the same type and size 48 UT108 109 OPERATING MANUAL B Switch Testing Ch
9. the display will become smaller which proves that the sensor is satisfactory 62 UT108 109 OPERATING MANUAL Chrysler Motor Fuel Dispenser Hall Switch pu Jumper a Ground signal Terminal Iron Plate Ford Motor Fuel Dispenser Switch py Magnetic d Hall Switch UNTEN Ground Red Signal Terminal Figure 18 63 UT108 109 OPERATING MANUAL 4 Magnetic Resistance Sensor see figure 19 The functions of a magnetic resistance sensor is similar to those of a Hall sensor and the testing methods of both sensors are also similar Their normal resistance is generally in a range of 150 O to 1 Refer to the ranges of resistance in various kinds of automotive manuals for the details Magnetic Resistance Senso Magnetic Resistance Distributor Magnet Figure 19 64 UT108 109 OPERATING MANUAL 5 RPM Testing see figure 20 1 Set the rotary switch to RPMx10 and select the number of cylinders in the automobile to be tested 2 Insert the red test lead into the terminal and the black one into the COM terminal 3 Connect the black test lead probe to the ground i e ground strap connection of the automobile and the red one to the appropriate testing test terminal of the computer of the automobile if the automobile is in a DIS type Refer to the servicing handbooks of various kinds of automotive manuals for the detailed position or the negative pole of the ignition coil if the
10. DWELL and select 6CYL 2 When the automobile is operating in a short fuel state or in a long fuel state the dwell of the meter should be displayed between 10 and 50 2 Fuel Injector Resistance Testing see figure 21 The testing method is similar to that of the resistance of an ignition coil 1 Cut the electric link off the injector Refer to the servicing handbooks of various kinds of automotive manuals for the detailed position 2 Connect the red and black test lead probes to the two ends of the injector The 67 UT108 109 OPERATING MANUAL Figure 21 68 UT108 109 OPERATING MANUAL J Engine Sensor Testing see figure 22 To be adapted to the provisions for low injection and fuel saving in the early period of the eighties the computer controlled regulators were installed in the automobile and the sensors provided the computer with some data required The Meter is an effective tool for the detection of the operation of a sensor Short Fuel L If the sensor has a 1 or 3 lead outlet the ground terminal is its shell Black If the sensor has a 2 or 4 lead outlet the ground terminal is its special wiring Figure 22 69 UT108 109 OPERATING MANUAL 1 Oxygen Sensor The oxygen sensor is used to test the oxygen content in the exhaust giving rise to an appropriate voltage or resistance A low voltage high resistance means too high oxygen content in the exhaust while a high voltage low resis
11. Lead Connector 50 mV Wiring 0 0V 54 UT108 109 OPERATING MANUAL Compare the readings of the tested voltages against the said table If the voltage is on the high side check the components and connectors to see if there is anything wrong If anything wrong is found do necessary servicing Solenoid LOSS Typical Solenoid Voltage Circuit Figure 15 55 UT108 109 OPERATING MANUAL H Charging System Voltage Testing This testing is used to see if the charging system operates normally so as to provide the electronic systems with adequate power lamps electric fans radio sets etc 1 Set the rotary switch to the DCV Insert the red test lead into the A terminal and the black one into the COM terminal Connect the black test lead probe to the negative pole of the battery and the red one to the positive pole of the battery Run the engine idle and close or turn off all the accessories with the normal voltage readings being 13 2 V to 15 2 V Open the throttle and control the rotation speed of the engine between 1800 RPM and 2800 RPM The voltage readings should be consistent with those in 3 with the difference being no more than 0 5 V Turn on the lamps windshield wipers fans and so on to increase the loads of the electronic systems with the voltage readings being no less than 13 0 V If the readings in Steps 3 4 and 5 are normal the charging system is also normal If the
12. MHz for refer only 2 AC DC Current mode When 40Hz 1KHz zrange x 10 except 10 A range a 24A 10 A range When 10Hz 40Hz or 1k Hz 1MHz for refer only 3 DC millvoltage mode When s 100KHz 40mV s a lt 200V rms When 10Hz 1MHz 1MHz 200mV s a lt 10V rms 85 UT108 109 OPERATING MANUAL 1 Diode Range Resolution Overload Protection he 1mV 500Vp Remarks e Open circuit voltage approximate 3V e silicon PN junction normal voltage is about 500 mV to 800 mV J Continuity Testing Range Resolution Overload Protection n 0 10 500Vp Remarks e Open circuit voltage approximate 3V e The buzzer does not sound when the resistance value is gt 300 The circuit is disconnected e The buzzer sounds continuously when the resistance value is 300 The circuit is in good condition 86 UT108 109 OPERATING MANUAL K Dwell Testing Range Resolution Accuracy Overload Protection 4CYL 6CYL 0 1 3 5 500 Vp 8CYL Remark e Input Scope 210V in forward impulse Bandwidth 2 0 5mS L Tach Rotation Speed Testing Range Resolution Accuracy Overload Protection 4CYL 6CYL 10 RPM 39645 500 Vp 8CYL Remarks e Input Scope 210V in forward impulse 87 Bandwidth 2 0 5mS UT108 109 OPERATING MANUAL e Maximum Tach 10000 RPM Tach Displayed Reading x 10 M Temperature UT109 only
13. OVOZENACTION UT108 109 OPERATING MANUAL Page Diode Testing 33 Capacitance Testing 36 Frequency Testing 38 Temperature Measurement UT109 only 40 Dwell Testing 42 Engine Tach Rotation Speed Testing RPMx10 44 Operation of Hold Mode 46 RANGE button 95 46 MAX MIN button 46 Data Outputting AT Display backlight 47 The BLUE button 47 Automatic power off 2 22 22 2 0 222 2 0002222000000 AT Diagnosis of Automotive Troubles 48 Fuse Testing Check the fuse to see if it is blown out 48 Switch Testing Check the switch to see if it can work correctly 49 Solenoid or Relay Testing 49 S
14. Range Resolution Accuracy Overload Protection E E gt 400 537 C T 1 10 500 Vp 400F 998 F 2 1 18 88 UT108 109 OPERATING MANUAL Maintenance This section provides basic maintenance information including battery and fuse replacement instruction Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration performance test and service information To avoid electrical shock or damage to the Meter do not get water inside the case A General Service Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn the Meter off when it is not in use and take out the battery when not using for a long time Do not store the Meter in a place of humidity high temperature explosive inflammable and strong magnetic field 89 UT108 109 OPERATING MANUAL B Replacing the Fuses see figure 27 A Warning To avoid electrical shock or arc blast or personal injury or damage to the Meter use specified fuses ONLY in accordance with the following procedure To replace the Meter s fused 1 2 3 Turn the Meter off and remove all connections from the terminals Remove the holster from the Meter Remove the 3 screws from the case bottom and separate the case top fro
15. UNI T UT108 109 Handheld Automotive Multi Purpose Meters Operating Manual UT108 109 OPERATING MANUAL Table of Contents Title Page Overview 5 Unpacking Inspection 6 Safety Information 2a er et 7 Rules for Safe Operation 8 Automotive Servicing Safety Guide 10 International Electrical Symbols 13 The Meter Structure 14 Rotary Switch seele i 15 Functional Buttons 16 Display Symbols ee e 18 Measurement Operation 20 Part 1 Multimeter Basic Testing 20 A AC DC Voltage Testing 20 DC millvoltage Testing 23 CG AC DC Current Testing 2 2222222 22230 as 25 D Resistance Testing 28 E Continuity Testing 2 A222 30 Title Part DOWPNA
16. Weight 370g including holster and battery Safety Compliances IEC61010 CATIII 1000V CATIV 600V overvoltage and double insulation standard Certification 80 UT108 109 OPERATING MANUAL Accurate Specifications Accuracy a Reading Digits guarantee for 1 year Operating Temperature 18 C to 28 C Relative Humidity No more than 75 RH A DC Voltage Range Resolution Accuracy Overload Protection Input impedance 4V 1 mV 40V 10 mV 0 5 3 1000V DC AC Around 10MQ 400V 100 mV 1000V 1V B AC Voltage Range Resolution Accuracy 40Hz 400Hz Accuracy 400Hz 1kHz 4V 1mV 40V 10mV 1 3 2 3 400V 100mV 1000V 1V 1 2 5 2 5 81 UT108 109 OPERATING MANUAL Remarks e Input impedance Around 10MQ e Overload Protection 1000V DC or AC e Displays effective value of sine wave mean value response 10 100 of the range C DC millvoltage Range Resolution Accuracy Overload Protection Input impedance SUV 0 8 3 500AC Around 4000MO 400mV 0 1 mV D DC Current Range Resolution Accuracy Overload Protection 400uA 0 1uA 1 2 4000HA Fuse 1A H 240V fast type p6x25mm 40mA 10 1 2963 400mA 100 4A 1mA 1 5 Fuse 10 240 fast type p6x25mm 10A 10mA ci Er id 82 UT108 109 OPERATING MANUAL Remarks When measur
17. and double insulation CAT 111 Distribution level fixed installation with smaller transient overvoltages than CAT IV CAT IV Primary supply level overhead lines cable systems ets Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired International electrical symbols used on the Meter and in this Operating Manual are explained on page 13 UT108 109 OPERATING MANUAL Rules For Safe Operation A Warning To avoid possible electric shock or personal injury and to avoid possible damage to the Meter or to the equipment under test adhere to the following rules e Before using the Meter inspect the case Do not use the Meter if it is damaged or the case or part of the case is removed Look for cracks or missing plastic Pay attention to the insulation around the connectors e Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Replace damaged test leads with identical model number or electrical specifications before using the Meter When using the test leads keep your fingers behind the finger guards Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and grounding e When the meter working at an effective voltage over 60V in DC or 30V rms in AC special care should be taken for there is danger of electric shock Use the proper terminals function and range
18. automobile is equipped with a distributor board Refer to the servicing handbooks of various kinds of automotive manuals for the detailed position 4 The normal starting rotation speed of an engine is about 50 RPM to 275 RPM Refer the detailed position to the servicing handbooks of various kinds of automotive manuals because this value relates to the then temperature engine size battery size etc A Warning The displayed value of the meter becomes the actual tach reading only after it is multiplied by 10 65 UT108 109 OPERATING MANUAL Ignition Coil Figure 20 66 UT108 109 OPERATING MANUAL 6 Fuel System Testing It is necessary to add more accurate engine fuel control to a low injection automobile Since 1980 the automotive manufacturing industry has used electronically controlled carburetor and fuel injection so as to achieve lower fuel injection 1 GM General Motor Testing the dwell of the C 3 mixed control solenoid Place the solenoid in a cylinder monitoring the ratio between the air and the fuel which should generally be 14 7 to 1 between the air and the fuel so as to reduce the injection of surplus fuel The testing is used to see if the solenoid is installed right in the position and the dwell of the meter can also indirectly used for the testing 1 Start the engine of the automobile to achieve a rotation speed of 3000 RPM So far as a GM automobile is concerned set the rotary switch to the
19. e measurement position in uA mA or Press blue button to switch between AC and DC measurement mode 3 AC current measurement display true rms value and press Hz button to obtain the frequency value input amplitude and frequency response refer to accuracy specifications 25 UT108 109 OPERATING MANUAL 4 Connect the test leads across with the object being measured The measured value shows on the display Note If the value of current to be measured is unknown use the maximum measurement position 10A terminal and reduce the range step by step until a satisfactory reading is obtained When current measurement has been completed disconnect the connection between the testing leads and the circuit under test When measuring 5A 10A for continuous measurement 10 seconds and interval time between 2 measurement greater than 15 minutes 26 UT108 109 OPERATING MANUAL Figure 6 27 UT108 109 OPERATING MANUAL D Resistance Testing see figure 7 A Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance To avoid harm to yourselves never attempt to input an effective voltage over 60V in DC or 30V in AC To measure resistance connect the Meter as follows 1 Insert the red test lead into the Q terminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriate mea
20. eck the switch to see if it can work correctly 1 The same as in Items 1 to 3 Fuse Testing 2 Connect the black test lead probe to one end of the switch and the red one to another end When the switch is connected the reading of the meter should be displayed less than 10 Q When the switch is cut off overload OL should be displayed as the reading of the meter C Solenoid or Relay Testing 1 The same as in Items 1 to 3 Fuse Testing 2 Connect the red and black test lead probes in parallel to the two end of a solenoid or relay The impedance of most of solenoids or relay coils is less than 200 See the details in the automotive manual ZA warning Both ends of a general solenoid or relay are connected with diodes Check to see if there is any damaged coil Even if the coil is found satisfactory the solenoid or relay may still be damaged The relay may be welded or worn due to the frequent sparking of the contacts The solenoid may be stuck when the coil is in an on position Therefore some potential problems cannot be found in testing 49 UT108 109 OPERATING MANUAL D Starting Charging System Testing The on off package of the engine starting system consists of a battery engine starting button solenoid and relay starting buttons lead connections and lines During the operation of the engine the charging system keeps the battery charged This system consists of an AC generator voltage calibrator lead connectio
21. ested should be equal to the displayed value multiplied by 10 For example the actual rotation speed of the engine of the automobile should be 2000 44 UT108 109 OPERATING MANUAL RPM 200 x 10 if the displayed value is 200 and the meter is set at the 6CYL 6 cylinders notch Ignition Coil Figure 14 45 UT108 109 OPERATING MANUAL L Operation of Hold Mode The Hold mode is applicable to all measurement functions e Press HOLD to enter Hold mode e Press HOLD again to exit Hold mode e Hold mode is displayed M RANGE button Press RANGE to enter the manual ranging mode the Meter beeps Press RANGE to step through the ranges available for the selected function the Meter beeps e Press and hold RANGE for over 2 seconds to return to auto ranging N MAX MIN button e Press MAX MIN to start recording of maximum and minimum values Steps the display through high MAX and low MIN readings The Meter enters manual ranging mode after pressing MAX MIN button e Press and hold MAX MIN for over 2 seconds to exit MAX MIN mode and return to the 46 UT108 109 OPERATING MANUAL present measurement range O Data Outputting Press and hold Hz button for over 2 seconds to enter or exit RS232C or USB mode The sleep mode feature will be disabled after entering RS232C or USB mode P Display backlight Press and HOLD button for over 2 seconds to turn on or turn off the display backlight Q The BLUE button
22. for your measurements The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is conducted to prevent damage of the 8 UT108 109 OPERATING MANUAL Meter e Disconnect circuit power and discharge all high voltage capacitors before testing resistance diodes or continuity e Before measuring current check the fuse is ok Before connecting the Meter in serial to the tested in circuit disconnect in circuit power e If the value of current to be measured is unknown use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained e Replace the battery as soon as the battery indicator appears With a low battery the Meter might produce false readings that can lead to electric show and personal injury e When servicing the Meter use only the same model number or identical electrical specifications replacement parts e internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident e Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of the Meter from corrosion damage and accident e Turn off the Meter when it is not in use and take out the battery when not using for a long time e Do not use or store the Meter in an environment of high temperature humidity explosive infla
23. he Insert the red test lead into the terminal and insert the black test lead into the COM terminal Secure the sensor with a table vice light up the propane burner and add a heat sensor terminal Make its temperature about 660 F and exhaust the oxygen from the sensor when the readings can be obtained The ZIRCONIA sensor has a voltage of 0 6 V or more The TITANIA sensor has a resistance of about 1 Move the burner away for heating when the reading can be obtained The ZIRCONIA sensor has a voltage of 0 4 V or more The TITANIA sensor has a resistance of about 4 kQ Warning In testing the readings will vary with the heating temperature 71 UT108 109 OPERATING MANUAL 2 Temperature Sensor see figure 23 The temperature sensor changes the output resistance through the changes in peripheral temperatures The hotter the sensor is the lower the resistance becomes The temperature sensor is generally used in engine braking air ventilation flow fuel temperature and other equipment E Heater _ Temperature Sensor Black Figure 23 72 UT108 109 OPERATING MANUAL Testing Procedure 1 The same as in the resistance testing method 2 When the general temperature of a heating sensor rises its resistance will drop The thermal resistance of the temperature sensor of the automotive engine is generally less than 300 z 3 Position Sensor see figure 24 The position sensor is an electrome
24. he reading The normal resistance is generally in a range of 3 to 50 In bending the lead the reading should remain unchanged 60 UT108 109 OPERATING MANUAL Spark Plug Figure 17 61 UT108 109 OPERATING MANUAL 3 Hall Switch Sensor Testing see figure 18 When the tach and dwell are tested in the computer of the automobile a Hall sensor is used The Hall sensor is normally used in the ignition system to detect the position of the camshaft so that the computer of the automobile can set the optimal time for the ignition and the opening of the fuel injector 1 Move the Hall sensor out of the automobile and see the details of the operation in various kinds of automotive manuals 2 Connect the positive pole of the 9 V battery to the source end of the sensor and the negative pole to the ground end of the sensor by referring the details to the positions of the source and ground ends of the sensor in various kinds of automotive manuals 3 Set the rotary switch of the meter to Q Insert the red test lead into the Q terminal and the black one into the COM terminal 4 Connect the red and black test lead probes in parallel to the signal connect terminal and ground end of the sensor and the meter should display a small ohm 5 When a metal plate blade steel tape etc is inserted into a concave magnetic pole of the sensor the display of the meter will be enlarged or overloaded if the metal plate is moved away
25. in figure 25 4 Turn on the ignition key but do not start the engine Displayed Values DC Voltage Type Sensor In a vacuum state the displayed value is generally between 3 V and 5 V The details shall be based on the parameters furnished by the supplier Frequency Type Sensor In a vacuum state the displayed value is generally 4770 RPM 15 This only applies to the MAP sensor produced by Ford and the other sensors shall 15 UT108 109 OPERATING MANUAL be based on the parameters furnished by the supplier A Warning RPM Frequency 120 the number of cylinders 76 UT108 109 OPERATING MANUAL MAP Type Sensor To Computer Figure 25 TT Low frequency MAF Sensor of GM General Motor in 1988 or Before Figure 26 UT108 109 OPERATING MANUAL 5 Mass Air Flow MAF Sensor see figure 26 The sensor converts the air flow into a DC voltage low frequency or high frequency signal The Meter can only be used to test a DC voltage or low frequency signal Testing Procedure 1 Connect the DC voltage type MAF sensor in the DC voltage testing method and set the rotary switch to DCV Connect the frequency type MAF sensor in the RPM testing method and set the meter to the number of cylinders in the automobile Now take 4 cylinders 4CYL for example 2 Connect the black test lead probe of the meter to the ground terminal i e ground strap connection and connect the red one a
26. ing 5 to 10A For continuous measurement lt 10 seconds and interval time between 2 measurement greater than 15 minutes E AC Current Range Resolution Accuracy 40Hz 400Hz Accuracy 400Hz 1kHz 1 2 5 1 2 10 4000uA 1pA 40mA 10uA 9 1 5 10 400mA 1000A ope idi 4A 1mA 40A 10mA en 2 10 Remarks Fuse Protection of mA terminal 1A H 240V fast type p6x25mm Fuse Protection of A terminal 10A H 240V fast type p6x25mm Displays effective value of sine wave TRMS 10 100 of the range When measuring 5 to 10 83 For continuous measurement lt 10 seconds and interval time between 2 measurement greater than 15 minutes F Resistance UT108 109 OPERATING MANUAL 1 5 5 Range Resolution Accuracy Overload Protection 4000 0 10 4kQ 10 40kO 100 1 5 500Vp 400kQ 1000 4MQ 1kO 40MQ 10kQ G Capacitance Range Resolution Accuracy Overload Protection 10nF 10pF 100nF 100pF 1000nF 1nF 3 5 500Vp 10uF 10nF 100uF 100nF 84 UT108 109 OPERATING MANUAL H Frequency Range Accuracy 10Hz 1MHz 0 1 4 Overload Protection the same as AC DC voltage DC millvoltage AC DC Current and RPM mode Input Amplitude a 1 AC DC voltage mode When 40Hz 1KHz a zrange x 10 except 1000V range a 2400V 1000V range When 10Hz 40Hz or 1k Hz 1
27. itive pole of the battery and the cable and connect the test lead probes to the circuit Connect the red test lead probe to the positive pole of the battery and the black one to the negative pole of the battery 51 UT108 109 OPERATING MANUAL A Warning Do not start the engine of the automobile in testing or the meter will be damaged 4 Read the reading of the tested current directly from the display with the normal current being about 100mA For the special supply of currents when the engine is off please refer to the automotive servicing manual If there emerges any additional current do necessary servicing A Warning A frequency modulated radio or clock needs a current supply of 100 mA F Trigger Voltage Battery Load Testing Upon the start of the engine test the battery to see if it can offer an adequate voltage 1 Set the rotary switch to DCV 2 Insert the red test lead into the V terminal and the black one into the COM terminal 3 Interrupt the ignition system to disable the start of the automobile Cut off the main ignition coil shunt coil cam and starting sensor so as to interrupt the ignition system Operate according to the automotive manual 4 Connect the black test lead probe to the negative pole of the battery and the red one to 52 UT108 109 OPERATING MANUAL the positive pole of the battery 5 Start the engine continuously for 15 seconds and the testing results are shown in contrast as follows
28. l Specificati ns 79 Accurate Specifications 55 55 rn rrr nnn nennen 81 Az DE Voltage 0000e sacan napa ee HE a eee 81 B AC Voltage gt gt 2402424 santas 14mm ee sm man 81 C DCimillvoltage ee a es 82 D AG C rrent 2398002 too Ss mens 53mm E 82 E DO C rrente see re ee es 83 F Resistance 84 Capacitance 5 0 9 09 ee ee 84 Frequency 85 Ll Diode Hr ee NE rg EN 86 Je CONTINUITY ee ea EU 86 Ke DWell 3 23222223222220 en SEE EEE TEST an 87 L Tachi Rotation Speed ec99eeee inniti areas rennen 87 M Temperature rss RB 88 Maintenance se ee A EEE I ern 89 A E RN 89 B Replacing the Fuses eccesso reote esene 90 C Replacing the Battery 92 UT108 109 OPERATING MANUAL Overview This Operating Manual covers information on safety and cautions Please read the relevant information carefully and observe all the Warnings and Notes strictly A Warning To avoid electric shock or personal injury read the Safety Information and Rules for Safe Operation carefully before using the Meter Automotive Digital Multimeter Model UT108 UT109 hereafter referred to as the Meter is a 4000 counts 3 3 4 digits manual ranging mete
29. lies 2 Do not try to find any short cut Check the hoses and leads where it is probably very difficult to find out where any trouble lies Check any trouble with the air purifier or pipeline system Check any damage to any sensor or the driving gear 5 Check the ignition lead any breakage of any terminal crack on any spark plug or breakage at the insulation of the ignition lead 6 Check all the vacuum hoses any right line shrinkage bend crack fracture or damage 7 Check the leads any connection of sharp edges connection of hot surfaces such as exhaust manifold shrinkage burn or scratch at the insulation or right line connection 8 Check circuit connections any pin corrosion bend or damage inappropriate connection position or damaged electrode lead ABO 12 UT108 109 OPERATING MANUAL International Electrical Symbols AC Alternating Current DC Direct Current Grounding AC or DC Diode Double Insulated Deficiency of Built In Battery Fuse Warning Refer to the Operating Manual A gt GX a 0 Conforms to Standards of European Union 13 The Meter Structure see figure 1 1 LCD display 2 Functional buttons 3 SELECT button 4 Power button 5 Rotary Switch 6 Input Terminals 14 UT108 109 OPERATING MANUAL Figure 1 UT108 109 OPERATING MANUAL Rotary Switch Below table indicated for information about the rota
30. ltage drop reading of 0 5V to 0 8V However the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips Connect the test leads to the proper terminals as said above to avoid error display The LCD will display OL indicating open circuit or wrong polarity connection When diode testing has been completed disconnect the connection between the testing leads and the circuit under test 34 UT108 109 OPERATING MANUAL Diode Testing Figure 9 35 UT108 109 OPERATING MANUAL G Capacitance Testing see figure 10 A Warning To avoid damage to the Meter or to the equipment under test disconnect circuit power and discharge all high voltage capacitors before measuring capacitance To measure capacitance connect the Meter as follows 1 Insert the red test lead into the 4 terminal and the black test lead into the COM terminal 2 Set the rotary switch to and press BLUE button to select capacitance measurement mode 3 The measured value shows on the display Note e The LCD displays OL indicating the tested capacitor is shorted or it exceeds the maximum range e When capacitance measurement has been completed disconnect all the connection between multi purpose socket capacitor and the Meter 36 UT108 109 OPERATING MANUAL Figure 10 37 UT108 109 OPERATING MANUAL H Frequency Testing see figure 11 To measure frequency connect the Meter as follows
31. m the case bottom Remove the fuse by gently prying one end loose then take out the fuse from its bracket Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed firmly in the bracket Fuse 1 1A H 240V fast type p6x25 mm Fuse 2 10 H 240V fast type 6x25 mm Rejoin the case bottom and case top and reinstall the 3 screws and holster Replacement of the fuses is seldom required Burning of a fuse always results from improper operation 90 UT108 109 OPERATING MANUAL Figure 27 91 UT108 109 OPERATING MANUAL C Replacing the Battery see figure 27 A Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears To replace the Meter s battery 1 Turn the Meter power off and remove all connections from the terminals 2 Take the Meter out from the holster 3 Remove the screw from the battery compartment and open the battery compartment 4 Take out the battery and replace with a new 9V battery NEDA1604 6F22 or 006P 5 Rejoin the battery compartment and the case bottom and reinstall the screw and the holster This operating manual is subject to change without notice 92 Copyright 2009 Uni Trend Group Limited All rights reserved Manufacturer Uni Trend Technology Dongguan Limited Dong Fang Da Dao Bei Shan Dong Fang Indus
32. mmable and strong magnetic field The performance of the Meter may 9 UT108 109 OPERATING MANUAL deteriorate after dampened e The Meter is suitable for indoor use Automotive Servicing Safety Guide Warning As some automobiles are installed with safety air bags you must pay attention to the cautions in the automotive servicing manual when you are working around the components and wiring of the air bags or any carelessness will open an air bag resulting in some personal injury Note that the air bag will also be opened for a few minutes after the ignition lock is closed or even when the automotive battery is cut off which is driven by the special energy reserve To prevent an accident from causing any personal injury or any damage to an automobile or any of its meters please read the following safety guidelines and testing procedure in earnest e Wear protective eyeglasses which meet safety requirements e Operate the automobile in a well ventilated place so as to prevent the inhalation of any toxic tail gas e Keep your own tools and testing instruments far from all the heater components of the 10 UT108 109 OPERATING MANUAL operating engine e Ensure that the automobile has stopped automatic transmission or put into neutral gear manual transmission and be sure that it is equipped with brakes and the wheels have been locked e Do not place any tool on the automotive battery which will cause a short circuit of the
33. ns and circuits The multimeter is an effective tool for the checking of these systems 1 Load Free Battery Testing Before testing the starting charging system test the battery to see if it is fully charged 1 Set the rotary switch to DCV 2 Insert the red test lead into the V terminal and the black one into the COM terminal 3 Turn off the ignition switch 4 Turn on the driving lights for 10 sec to release charges from the battery 5 Connect the black test lead probe to the negative pole of the battery and the red one to the positive pole of the battery 2 The testing results are shown in contrast as follows and if the battery is less than 100 please use it after charging it 50 UT108 109 OPERATING MANUAL 12 60 V 100 12 45 V 75 12 30 V 50 12 15 V 25 E Battery Power Consumption Testing when the Engine is off The test is carried out to find the amperage of the power consumption of the battery when both the ignition key and the engine are off The test is helpful for the determination of the additional consumption of the battery which may finally lead to the exhaustion of the battery 1 Turn off and close the ignition key and all its accessories Make sure that the bus engine louver and room lights have been turned off and closed 2 Set the rotary switch to A 10A Insert the red test lead into the A terminal and the black one into the COM terminal 3 Cut off the link between the pos
34. r The meter uses large scale of integrated circuit with integrated A D converter as its core Spotting a unique design with an extra large LCD display Connect Test Leads display full overload protection and unique outlook design For this reason it emerges as an electric meter with more outstanding performance for safer operation than other meters In addition to the Dwell Tach and Data Hold feature the Meter can be used to test the AC DC voltage AC DC current resistance frequency diode continuity and Capacitance UT109 has an extra temperature feature UT108 109 OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter Check the following items carefully to see any missing or damaged part Item Description Qty 1 English Operating Manual 1 piece 2 Test Lead 1 pair K Type Point Contact Temperature Probe 3 UT109 only and It is only suitable for 1 pair measuring temperature under 230 C 4 Alligator Clip 1 piece 5 RS232C interface cable 1 piece 6 CD ROM 1 piece 7 9V Battery NEDA 1604 6F22 or 006P 1 piece 8 Multi Purpose Socket Optional 1 piece 9 USB interface cable Optional 1 piece In the event you find any missing or damage please contact your dealer immediately 6 UT108 109 OPERATING MANUAL Safety Information This Meter complies with standards IEC61010 in pollution degree 2 overvoltage category CATIII 1000V CATIV 600
35. re probe and the object being measured and remove the temperature probe away from the input terminals of the Meter 40 UT108 109 OPERATING MANUAL The included K type point contact temperature probe can only be usec in the measurement below 230 C Figure 12 41 UT108 109 OPERATING MANUAL J Dwell Testing see figure 13 It was very important in the past to test the dwell of the cut off switch of an ignition system The dwell testing means the duration when the cut off switch remains off when the cam is turning Now as an automobile is ignited electronically it is no longer necessary to adjust the dwell In addition the dwell testing can also be used to test a mixed controlled solenoid e g GM feedback carburetor 1 Set the rotary switch to RPM X10 DWELL Press RANGE button to select the number of cylinders and press BLUE button to select DWELL measurement mode 2 insert the red test lead into the V terminal and the black test lead into the COM terminal Connect the ends to be tested as illustrated If the cut off switch of an ignition system is tested connect the red test lead probe to the primary negative end of the ignition coil Refer to the automotive servicing manual for the specific position If the dwell of an arbitrary ON OFF equipment is tested connect the red probe to the end of the equipment fixed with an ON OFF switch 3 Connect the black test lead probe to the good ground terminal of the automobile 4
36. readings in Steps 3 4 and 5 are beyond the limits or inconsistent with those in the operation manual check the current ranges of the conveying belt regulator AC generator connector and open circuit AC generator If any further diagnosis is required refer to various kinds of automotive manuals 56 UT108 109 OPERATING MANUAL l Ignition System Testing 1 Ignition Coil Testing 1 Before the operation cool the engine and cut off the ignition coil 2 Set the rotary switch to the Insert the red test lead into the terminal and the black one into the COM terminal Test the primary coil of the ignition coil 3 Short circuit the red and black test lead probes Their short circuit resistance should be less than 0 5 If itis more check the test lead to see if it is loose or damaged If itis damaged replace it with a new one 4 Connect the red test lead probe to the primary pole of the ignition coil and the black one to the primary pole of the coil see figure 16 See the detailed positions in various kinds of automotive manuals A Warning The reading of the testing becomes the actual tested resistance only after the reduction of the short circuit values of the test leads The primary resistance is generally between 0 3 and 2 0 5 Set the rotary switch to the 200 kO and test the primary coil of the ignition coil 6 Connect the red test lead probe to the secondary outlet and the black one to the
37. resistance value is gt 300 The circuit is disconnected e buzzer sounds continuously when the resistance value is X300 The circuit is in 30 UT108 109 OPERATING MANUAL good condition 4 The nearest value of the tested circuit show on the display the unit is Note e Open circuit voltage is approx e When continuity testing has been completed disconnect the connection between the testing leads and the circuit under test 31 UT108 109 OPERATING MANUAL Figure 8 32 UT108 109 OPERATING MANUAL F Diode Testing see figure 9 A Warning To avoid possible damage to the Meter and to the device under test disconnect circuit power and discharge all high voltage capacitors before testing diodes and continuity To avoid harm to yourselves never attempt to input an effective voltage over 60V in DC or 30V in AC To test a diode out of a circuit connect the Meter as follows 1 Insert the red test lead into the I terminal and the black test lead into the COM terminal 2 Set the rotary switch to gt F 3 For forward voltage drop readings on any semiconductor component place the red test lead on the component s anode and place the black test lead on the component s cathode The polarity of red test lead is while black test lead is 4 The measured value shows on the display 33 UT108 109 OPERATING MANUAL Note In a circuit a good diode should still produce a forward vo
38. ry switch positions DC Voltage Measurement mV millvoltage Measurement The unit of temperature C Centigrade temperature UT109 only F The unit of temperature F Fahrenheit temperature UT109 only Q Resistance Measurement Jr Capacitance measurement Continuity Test gt Diode Test Hz Frequency Measurement uA Current measurement unit mA Current measurement unit mA A Current measurement unit A RPM X 10 Automotive engine tach testing Displayed Reading x 10 Unit rpm Dwell Automotive ignition dwell testing Unit degree 15 UT108 109 OPERATING MANUAL Functional Buttons see figure 2 Below table indicated for information about the functional button operations Figure 2 16 UT108 109 OPERATING MANUAL Button Operation Performed Turn the power and off e Press HOLD once to enter hold mode HOLD x e Press HOLD again to exit hold mode and the present value is shown e Press and hold for 2 seconds to turn the display backlight on or off Start recording of maximum and minimum values MAX MIN Press to step the display through high MAX and low MIN readings at any time e Press once to enter Frequency measurement mode Hz e Press and hold for 2 seconds to enter RS232C or USB mode e Press RANGE to enter the manual ranging mode e Press and hold RANGE for 2 seconds to return to auto ranging mode
39. s higher than the range although readings may be obtained When AC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test To measure DC millvoltage connect the Meter as follows 1 Insert the red test lead into the V terminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriate measurement position in mV 3 Connect the test leads across with the object being measured The measured value shows on the display Press Hz button to obtain the frequency value input amplitude and frequency response refer to accuracy specifications 4 The Meter has an input impedance of approx 4000MO 23 UT108 109 OPERATING MANUAL Figure 5 24 UT108 109 OPERATING MANUAL C AC DC Current Testing see figure 6 A Warning Before connecting the Meter in serial to the tested in circuit disconnect in circuit power If the fuse burns out during measurement the Meter may be damaged or the operator himself may be hurt Use proper terminals function and range for the measurement When the testing leads are connected to the current terminals do not parallel them across any circuit otherwise it will burn the fuse or damage to the Meter To measure AC DC current connect the Meter as follows 1 Insert the red test lead into the uA mA or A terminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriat
40. s illustrated in figure 25 3 Turn on the ignition key but do not start the engine Displayed Values DC Voltage Type Sensor The displayed value should be less than or equal to 1V The details shall be based on the parameters furnished by the supplier Frequency Type Sensor In a vacuum state the displayed value should be 330 RPM 5 This only applies to GM low frequency sensors The other low frequency sensors shall be based on the parameters furnished by the supplier A Warning RPM Frequency x 120 the number of cylinders 78 UT108 109 OPERATING MANUAL General Specifications Maximum Voltage between any Terminals and grounding Refer to different range input protection voltage Fuse Protection of JA mA terminal 1A H 240V fast type p6x25mm Fuse Protection of A terminal 10A H 240V fast type p6x25mm Maximum Display 4000 analogue bar graph 41 segments Measurement Speed Updates 2 3 times second Range Auto or manual Polarity Display Auto Overload Display OL Battery Deficiency Display Temperature Operating 00C 400C 32 C 104 C Storage 100C 500C 14 F 122 F e Relative Humidity lt 75 0 Cto below 30 C lt 50 30 C to 40 C e Altitude Operating 2000m Storage 10000m 79 UT108 109 OPERATING MANUAL Electromagnetic Compatibility EN61326 1 2006 EN61326 2 2006 Battery Type One piece of 9V NEDA1604 or 6F22 or 006P Dimensions HxWxL 180 x 87 x 47mm
41. surement position in range then press BLUE button to select resistance measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display Note e When there is no input for example in open circuit condition the Meter displays OL e When the resistance reading20 5Qin the short circuit condition please check for loose test leads or other reasons e For high resistance gt 1MQ it is normal taking several seconds to obtain a stable 28 UT108 109 OPERATING MANUAL reading and it is better to choose shorter test lead e When resistance measurement has been completed disconnect the connection between the testing leads and the circuit under test Figure 7 29 UT108 109 OPERATING MANUAL E Continuity Testing see figure 8 A Warning To avoid possible damage to the Meter and to the device under test disconnect circuit power and discharge all high voltage capacitors before testing diodes and continuity To avoid harm to yourselves never attempt to input an effective voltage over 60V in DC or 30V in AC To test for continuity connect the Meter as below 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to then press BLUE button to select continuity measurement mode 3 Connect the test leads across with the object being measured e buzzer does not sound when the
42. tance means too low oxygen content The computer regulates the ratio between the air and the fuel according to the high or low voltage There are normally two types of oxygen sensors the zirconia and titania sensors Refer to the different external properties of the two types for the details Testing Procedure 1 Move the oxygen sensor out of the automobile 2 Set the rotary switch to Insert the red test lead into the terminal and the black one into the COM terminal 3 Connect the black test lead probe of the meter to the ground terminal i e cold end of the sensor A Warning If the sensor has a 1 or 3 lead outlet the ground terminal is its shell If the sensor has a 2 or 4 lead outlet the ground terminal is its special wiring 4 Connect the red test lead probe of the meter to the signal terminal i e hot end of the sensor 70 UT108 109 OPERATING MANUAL If the sensor has more than 3 leads what is used in the automobile is a heat oxygen sensor which has 2 hot ends Refer the positions of the hot ends in various kinds of automotive manuals At this time connect the red and black test lead probes respectively to these two hot ends Compare the readings with the specifications in the operation manual provided by the manufacturer The ZIRCONIA sensor is tested with the DCV Insert the red test lead into the V terminal and insert the black test lead into the COM terminal The TITANIA sensor is tested with t
43. tarting Charging System Testing 50 UT108 109 OPERATING MANUAL Title Page E Battery Power Consumption Testing when the Engine Is off 51 F Trigger Voltage Battery Load Testing 52 G Voltage Drop Testing 5A H Charging System Voltage Testing 56 l Ignition System Testing 57 1 Ignition Coil Testing 57 2 Ignition System High Voltage Damper Testing 60 3 Hall Switch Sensor Testing 62 4 Magnetic Resistance Sensor 64 5 RPMx10 Testing 65 6 Fuel System Testing 67 J Engine Sensor Testing 69 1 Oxygen Sensor 70 2 Temperat re Sensor 2 22 23 4 s 254k ei seen 72 3 Ao o ewe 73 4 Absolute Pressure MAP and Baro Sensor 75 5 Mass Air Flow MAF Sensor 78 UT108 109 OPERATING MANUAL Title Page Genera
44. ter or variable resistance It is used for the computer monitoring of the position and direction of a mechanical device The typical position sensors include throttle exhaust recalculating EGR blade air flow and other sensors Testing Procedure 1 The same as in the resistance testing method 2 Connect the red and black test lead probes respectively to the signal test terminal and ground terminal Refer to various kinds of automotive servicing manuals for its position and the resistance to be tested 73 UT108 109 OPERATING MANUAL Toyota Motor Throttle Position Sensor Ground Signal Terminal Empty Foot Figure 24 74 UT108 109 OPERATING MANUAL 4 Absolute Pressure MAP and Baro Sensor see figure 25 The MAP sensor is used to change a pressure signal into a DC voltage or frequency one All GM Chrysler Honda and Toyota use DC voltage type MAP sensors while Ford uses frequency type MAP sensors Refer to relevant manuals for other automotive manufacturers Testing Procedure 1 Connect the DC voltage type MAP sensor in the DC voltage testing method and set the rotary switch to DCV 2 Connect the frequency type MAP sensor in the RPMx10 testing method and set the meter to the number of cylinders in the automobile 3 Taking 4 cylinders 4CYL for example connect the black test lead probe of the meter to the ground terminal i e ground strap connection and connect the red one as illustrated
45. trial Development District Hu Men Town Dongguan City Guang Dong Province China Postal Code 523 925 Headquarters Uni Trend Group Limited Rm901 9 F Nanyang Plaza 57 Hung To Road Kwun Tong Kowloon Hong Kong Tel 852 2950 9168 Fax 852 2950 9303 Email info uni trend com http www uni trend com
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