D900 CANScan Manual
Contents
1. vehicle with the door open On some Asian and European vehicles the DLC is located behind the ashtray the ashtray must be removed to access it or on the far left corner of the dash If the DLC cannot be located consult the vehicle s service manual for the location D900 Functions on all OBDII compliant vehicles 3 PRODUCT INFORMATION 3 1 Product Description LCD DISPLAY Indicates menu and test results It is a backlight 128x64 pixel display with contrast adjustment BUTTON 1 Confirms a selection or action from a menu list 2 Returns to the main menu or cancel an operation 3 Scrolls through menu items 10 D900 Functions on all OBDII compliant vehicles 3 2 Product Specifications Display Backlight 128 X 64 pixel display with contrast adjustment Operating Temperature 0 to 50 C 32 to 122F Storage Temperature 20 to 70 C 4 to 158F Power DC12V provided via the vehicle s battery Dimensions Length 163mm 6 4 Width 90mm 3 5 Height 29mm 1 1 Weight 350g 8 90z 11 D900 Functions on all OBDII compliant vehicles 3 3 Product Features HM Works with all 1996 and newer cars amp light trucks that are OBDII compliant including the CAN J1850 PWM J1850 VPW ISO9141 and KWP2000 protocols E Read hard memory pending intermittent and historic codes and show definitions Erase codes and reset MIL View live data stream View freeze frame data D2. Oxygen Sensor Monitor Catalyst Monitor EGR Monitor Misfire Monitor etc describe which component or system each Monitor is designed to test and diagnose 23 D900 Functions on all OBDII compliant vehicles Emissions Inspection and Maintenance I M Readiness Monitor Status Information I M Readiness Monitor Status shows which of the vehicle s Monitors have run and completed their diagnosis and testing and which ones have not yet run and completed testing and diagnosis of their designated sections of the vehicle s emissions system HM If a Monitor was able to meet all the conditions required to enable it to perform the self diagnosis and testing of its assigned engine system it means the monitor HAS RUN M Ifa Monitor has not yet met all the conditions required for it to perform the self diagnosis and testing of its assigned engine system it means the Monitor HAS NOT RUN The Monitor Run Not Run status does not show whether or not a problem exists in a system Monitor status only indicates whether a particular Monitor has or has not run and performed the self diagnosis and testing of its associated system Performing I M Readiness Quick Check When a vehicle first comes from the factory all Monitors indicate a HAVE RUN status This indicates that all Monitors have run and completed their diagnostic testing The HAVE RUN status remains in the computer s memory unless the Diagnostic Trouble Codes are er
3. be set If proper repairs to correct the problem that caused the code s to be set are not made the code s will appear again and the check engine light will illuminate as soon as the vehicle is driven long enough for its Monitors to complete their testing 18 D900 Functions on all OBDII compliant vehicles 4 4 Viewing Live Data The OBDII Scan Tool is a special diagnostic tool that communicates with the vehicle s computer The Scan Tool lets you view real time Live Data This information includes values volts rpm temperature speed etc and system status information open loop closed loop fuel system status etc generated by the various vehicle sensors switches and actuators In effect the Scan Tool lets you view in real time the same signal values generated by the sensors actuators switches and or vehicle system status information used by the vehicle s computer when calculating and conducting system adjustments and corrections The real time Live Data vehicle operating information values status that the computer supplies to the Scan Tool for each sensor actuator switch etc is called Parameter Identification PID Data Each PID sensor actuator switch status etc has a set of operating characteristics and features parameters that serve to identify it The Scan Tool displays this information for each sensor actuator switch or status that is supported by the vehicle under test WARNING If the v
4. will display after DTC Use the the UP and DOWN buttons as necessary to scroll up or down to view all available Freeze Frame Data 21 D900 Functions on all OBDII compliant vehicles 4 6 I M Readiness Testing I M is an Inspection and Maintenance program legislated by the Government to meet federal clean air standards The program requires that a vehicle be taken periodically to an Emissions Station for an Emissions Test or Smog Check where the emissions related components and systems are inspected and tested for proper operation Emissions Tests are generally performed once a year or once every two years On OBDII systems the I M program is enhanced by requiring vehicles to meet stricter test standards One of the tests instituted by the Federal Government is called I M 240 On I M 240 the vehicle under test is driven under different speeds and load conditions on a dynamometer for 240 seconds while the vehicle s emissions are measured Emissions tests vary depending on the geographic or regional area in which the vehicle is registered If the vehicle is registered in a highly urbanized area the I M 240 is probably the type of test required If the vehicle is registered in a rural area the stricter dynamometer type test may not be required I M Readiness Monitors I M Readiness shows whether the various emissions related systems on the vehicle are operating properly and are ready for Inspection and Maintenance t
5. main system where the fault occurred Body Chassis Powertrain or Network The 2nd character is a numeric digit It identifies the type of code Generic or Manufacturer Specific Generic DTCs are codes that are used by all vehicle manufacturers The standards for generic DTCs as well as their definitions are set by the Society of Automotive Engineers SAE Manufacturer Specific DTCs are codes that are controlled by the vehicle manufacturers The Federal Government does not require vehicle manufacturers to go beyond the standardized generic DTCs in order to comply with the new OBDII emissions standards However manufacturers are free to expand beyond the standardized codes to make their systems easier to diagnose D900 Functions on all OBDII compliant vehicles HM The 3rd character is a numeric digit It identifies the specific system or sub system where the problem is located M The 4th and 5th characters are numeric digits They identify the section of the system that is malfunctioning DTC EXAMPLE P0115 Engine Coolant Temperature Sensor 1 Circuit B Body C Chassis P Powertrain U Network 0 Generic 1 Manufacturer Specific 2 Generic 3 Includes both Generic and Manufacturer Specific Codes Identifies the system where the problem is located 1 Fuel and Air Metering 2 Fuel and Air Metering injector circuit malfunction only 3 Ignition System or Misfire 4 Auxiliary Emission
6. on all OBDII compliant vehicles properly check the vehicle s DLC 4 Turn the ignition on But do not start the engine 5 When the Scan Tool cable connector is properly connected to the vehicle s DLC the LCD display shows instructions for select New Scan 6 Press the New Scan button A sequence of message showing the OBDII protocols will be observed on the display until the vehicle protocol is detected A PROTOCOL is a set of rules and procedures for regulating data transmission between computers and between testing equipment and computers As of this writing five different types of protocols CAN J1850 PWM J1850 VPW ISO9141 and KWP2000 are in use by vehicle manufacturers The Scan Tool automatically identifies the protocol type and establishes a communication link with the vehicle s computer If the Scan Tool fails to communicate with the vehicle s computer an Unable to establish a link with the vehicle message shows up on the display HM Verify that the ignition is ON M Check if the Scan Tools OBDII connector is securely connected to the vehicle s DLC Verify that the vehicle is OBDII compliant HM Turn the ignition off and wait for about 10 seconds Turn the ignition back to on and repeat the procedure from step 6 If the Unable to establish a link with the vehicle message does not go away then there might be problems for the Scan Tool to communicate with the vehicle 14 D900 Functio
7. Control System 5 Vehicle Speed Control and Idle Control System 6 Computer Output Circuits 7 Transmission 8 Transmission Identifies what section of the system is malfunctioning D900 Functions on all OBDII compliant vehicles DTCs and MIL Status When the vehicle s on board computer detects a failure in an emissions related component or system the computer s internal diagnostic program assigns a diagnostic trouble code DTC that points to the system and subsystem where the fault was found The diagnostic program saves the code in the computer s memory It records a Freeze Frame of conditions present when the fault was found and lights the Malfunction Indicator Lamp MIL Some faults require detection for two trips in a row before the MIL is turned on The Malfunction Indicator Lamp MIL is the accepted term used to describe the lamp on the dashboard that lights to warn the driver that an emissions related fault has been found Some manufacturers may still call this lamp a Check Engine or Service Engine Soon light D900 Functions on all OBDII compliant vehicles 2 4 Location of the Data Link Connector DLC The 16 pin DLC is_ usually located under the instrument panel dash within 12 inches 300 mm of center of the panel on the driver s side of most vehicles It should be easily ween CENTE accessible and visible from a LEFT GoRNen OF DASH kneeling position outside the
8. DTC is associated with a specific Monitor Consult the vehicle s service manual to identify the Monitor or Monitors associated with the faults that were repaired Follow the manufacturer s procedures to perform a Trip Drive Cycle for the appropriate Monitors HM While observing the Monitor icons on the Scan Tool s display perform a Trip Drive Cycle for the appropriate Monitor or Monitors If the vehicle needs to be driven in order to perform a Trip Drive Cycle ALWAYS have a second person help you One person should 26 D900 Functions on all OBDII compliant vehicles drive the vehicle while the other person observes the Monitor icons on the Scan Tool for Monitor RUN status Trying to drive and observe the Scan Tool at the same time is dangerous and could cause a serious traffic accident 4 When a Monitor s Trip Drive Cycle is performed properly the Monitor icon on the Scan Tool s display changes from flashing to solid indicating that the Monitor has run and finished its diagnostic testing HM If after the Monitor has run the MIL on the vehicle s dash is not lit and no stored or pending codes associated with that particular Monitor are present in the vehicle s computer the repair was successful HM If after the Monitor has run the MIL on the vehicle s dash lights and or a DTC associated with that Monitor is present in the vehicle s computer the repair was unsuccessful Refer to the vehicle s service manual an
9. EHICLE EMISSION CONTROL INFORMATION ENGINE FAMILY EFN2 GYBT2BA OBO 2 DISPLACEMENT CERTIFIED I OBD II CERTIFIED N NEUTRAL Li ERMEDIATE T D900 Functions on all OBDII compliant vehicles 2 Government Regulations require that all OBDII compliant vehicles must have a common sixteen pin Data Link Connector DLC Some 1994 and 1995 vehicles have 16 pin connectors but are not OBDII compliant Only those vehicles with a Vehicle Emissions Control Label stating OBDII Certified are OBDII compliant D900 Functions on all OBDII compliant vehicles 2 3 Diagnostic Trouble Codes DTCs Diagnostic Trouble Codes DTCs are meant to guide you to the proper service procedure in the vehicle s service manual DO NOT replace parts based only on DTCs without first consulting the vehicle s service manual for proper testing procedures for that particular system circuit or component Diagnostic Trouble Codes DTCs are codes that identify a specific problem area DTCs are alphanumeric codes that are used to identify a problem that is present in any of the systems that are monitored by the on board computer PCM Each trouble code has an assigned message that identifies the circuit component or system area where the problem was found OBDII diagnostic trouble codes are made up of five characters The Ist character is a letter It identifies the
10. Table of Contents 1 SAFETY PRECAUTIONS AND WARNINGS 1 2 INTRODUCTION 2 ciciciicscutsanssagbelesecssedteonsbelesscueenteostons 3 2 1 On Board Diagnostics OBD uu eee 3 2 2 Vehicles Covered inii es 4 2 3 Diagnostic Trouble Codes DTCs eee 6 2 4 Location of the Data Link Connector DLC 9 3 PRODUCT INFORMATION 00 0c eee eeeeeeees 10 3 1 Product Description eee eee eee eeeeeeees 10 3 2 Product Specifications eee eeeeeeee 11 3 3 Product Features cece eee iini ienis 12 4 OPERATING INSTRUCTIONS cece eeeeeeees 13 4 1 Using the Scan Tool eee eeeeeeeeee 13 4 2 Read Diagnostic Trouble Codes DTCs 16 4 3 Erase Diagnostic Trouble Codes DTCs 17 4 4 Viewing Live Data eee eee eects eeeeeeeeees 19 4 5 Freeze Frame Dato eee cece eeeeseeeeeeeeeees 21 4 6 I M Readiness Testing 0 0 0 ccc ee eeeeeeeeees 22 4 7 Vehicle Information cee eee eeeeeeeee 28 5 WARRANTY AND SERVICING eee eee 29 5 1 Limited One Year Warranty cee 29 5 2 Service Procedures cccccccsesssssssssessesssssseeees 30 D900 Functions on all OBDII compliant vehicles 1 SAFETY PRECAUTIONS AND WARNINGS To avoid personal injury instrument damage and or damage to your vehicle do not use the OBDII Scan Tool before reading this manual This manual describes common test procedures used by experienced service technicians Many test procedures require precautions to avoid acc
11. all OBDII compliant vehicles 5 WARRANTY AND SERVICING 5 1 Limited One Year Warranty Autel warrants to its customers that this product will be free from all defects in materials and workmanship for a period of one year from the date of the original purchase subject to the following terms and conditions 1 The sole responsibility of Autel under the Warranty is limited to either the repair or at the option of Autel replacement of the Scan Tool at no charge with Proof of Purchase The sales receipt may be used for this purpose 2 This warranty does not apply to damages caused by improper use accident flood lightning or if the product was altered or repaired by anyone other than the Manufacturer s Service Center 3 Autel shall not be liable for any incidental or consequential damages arising from the use misuse or mounting of the Scan Tool Some states do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you 29 D900 Functions on all OBDII compliant vehicles 5 2 Service Procedures Further questions or for more information on repairing please contact your local store or distributor If it becomes necessary to return the Scan Tool for repair contact your local distributor for more informaiton 30
12. ased or the vehicle s computer memory is cleared The Scan Tool allows you to retrieve Monitor System Status Information to help you determine if the vehicle is ready for an Emissions Test Smog Check In addition to retrieving Diagnostic Trouble Codes the Scan Tool also retrieves Monitor Run Not Run status This information is very important since different areas of 24 D900 Functions on all OBDII compliant vehicles the state country have different emissions laws and regulations concerning Monitor Run Not Run status Before an Emissions Test Smog Check can be performed your vehicle must meet certain rules requirements and procedures legislated by the Federal and state country governments where you live 1 In most areas one of the requirements that must be met before a vehicle is allowed to be Emissions Tested Smog Checked is that the vehicle does not have any Diagnostic Trouble Codes present with the exception of PENDING Diagnostic Trouble Codes 2 In addition to the requirement that no Diagnostic Trouble Codes be present some areas also require that all the Monitors that a particular vehicle supports indicate a Has Run status condition before an Emissions Check may be performed 3 Other areas may only require that some but not all Monitors indicate a Has Run status before an Emissions Test Smog Check may be performed Monitors with a Has Run status indicate that all the required conditions they needed
13. d recheck repair procedures 27 D900 Functions on all OBDII compliant vehicles 4 7 Vehicle Information The Vehicle Information function offers two options for retrieving reference information for the vehicle under test Vehicle ID and Available Modules Retrieving Vehicle ID Information The Vehicle ID function is applicable to model year 2000 and newer OBDII compliant vehicles The Scan Tool can retrieve a list of information provided by the vehicle manufacturer unique to the vehicle under test from the vehicle s on board computer This information may include The vehicle s VIN number Hs The control module identification number HM The vehicle s calibration ID s These IDs uniquely identify the software version s for the vehicle s control module s M The Vehicle s Calibration Verification Number s CVNs required by ODB2 regulations CVNs are used to determine if emissionrelated calibrations for the vehicle under test have been changed One or more CVNs may be returned by the vehicle s computer 1 Select Vehicle Info from the main menu 2 Retrieves and displays Vehicle Information test result from your vehicle s on board computer HM If the Vehicle Information function is not supported by the vehicle under test an No Vehicle Information Data is presently stored in the vehicle s computer message shows on the Scan Tool s display Press the ESC button to return to the main menu 28 D900 Functions on
14. ehicle must be driven in order to perform a troubleshooting procedure ALWAYS have a second person help you One person should drive the vehicle while the other person observes the Scan Tool data It is dangerous to drive and operate the Scan Tool at the same time because a serious traffic accident might be caused 19 D900 Functions on all OBDII compliant vehicles VIEWING LIVE DATA 1 Select Live Data from the main menu 2 Real time Live Data PID information supported by the vehicle under test displays Remember what you are viewing is real time Live Data The values volts rpm temperature vehicle speed system status etc for the various PIDS displayed may change as the vehicle s operating conditions change 3 A vehicle usually supports several PIDs however only a limited amount of PID data can be displayed on the screen at one time Use the the UP and DOWN buttons as necessary to scroll up or down to view all available PID data MH If communication with the vehicle is lost while viewing Live Data a Unable to establish a link with the vehicle message shows on the Scan Tool s display 4 If you experience vehicle problems view and or compare the Live Data PID information displayed on the Scan Tool to specifications in the vehicle s repair manual 20 D900 Functions on all OBDII compliant vehicles 4 5 Freeze Frame Data 1 Select Freeze Frame from the main menu 2 Freeze Frame Data if available
15. esting State and Federal Governments enacted Regulations Procedures 22 D900 Functions on all OBDII compliant vehicles and Emission Standards to ensure that all emissions related components and systems are continuously or periodically monitored tested and diagnosed whenever the vehicle is in operation It also requires vehicle manufacturers to automatically detect and report any problems or faults that may increase the vehicle s emissions to an unacceptable level The vehicle s emissions control system consists of several components or sub systems Oxygen Sensor Catalytic Converter EGR Fuel System etc that aid in reducing vehicle emissions To have an efficient Vehicle Emission Control System all the emissions related components and systems must work correctly whenever the vehicle is in operation To comply with State and Federal Government regulations vehicle manufacturers designed a series of special computer programs called Monitors that are programmed into the vehicle s computer Each of these Monitors is specifically designed to run tests and diagnostics on a specific emissions related component or system Oxygen Sensor Catalytic Converter EGR Valve Fuel System etc to ensure their proper operation Currently there are a maximum of eleven Monitors available for use Each Monitor has a specific function to test and diagnose only its designated emissions related component or system The names of the Monitors
16. etermines the malfunction indicator lamp MIL status I M monitor readiness test Vehicle Information on 2000 and newer vehicles that support Mode 9 HM Record and playback E Fasy to use with one plug in HM Highly reliable and accurate 12 D900 Functions on all OBDII compliant vehicles 4 OPERATING INSTRUCTIONS 4 1 Using the Scan Tool Retrieving and using Diagnostic Trouble Codes DTCs for troubleshooting vehicle operation is only one part of an overall diagnostic strategy Never replace a part based only on the DTC definition Each DTC has a set of testing procedures instructions and flow charts that must be followed to confirm the location of the problem This information is found in the vehicle s service manual Always refer to the vehicle s service manual for detailed testing instructions Using the Scan Tool Procedure 1 Turn the ignition off 2 Locate the vehicle s 16 pin Data Link Connector DLC See page 9 for connector location Some DLCs have a plastic cover that must be removed before connecting the Scan Tool cable connector 3 Connect the Scan Tool cable connector to the vehicle s DLC The cable connector is keyed and will only fit one way iIf you have problems connecting the cable connector to the DLC rotate the connector 180 and try again HM Ifyou still have problems check the DLC both on the vehicle and on the Scan Tool Refer to your vehicle s service manual to 13 D900 Functions
17. idents that can result in personal injury and or damage to your vehicle or test equipment Always read your vehicle s service manual and follow its safety precautions before and during any test or service procedure Always observe the following general safety precautions When an engine is running it produces carbon monoxide a toxic and poisonous gas To prevent serious injury or death from carbon monoxide poisoning operate the vehicle ONLY in a well ventilated area To protect your eyes from propelled objects as well as hot or caustic liquids always wear approved safety eye protection When an engine is running many parts such as the coolant fan pulleys fan belt etc turn at high speed To avoid serious severe injury always be aware of moving parts Keep a safe distance from these parts as well as other potentially moving objects Engine parts become very hot when the engine is running To prevent severe burns avoid contact with hot engine parts Before starting an engine for testing or troubleshooting make sure the parking brake is engaged Put the transmission in park for automatic transmission or neutral for manual D900 Functions on all OBDII compliant vehicles transmission Block the drive wheels with suitable blocks Connecting or disconnecting test equipment when the ignition is ON can damage test equipment and the vehicle s electronic components Turn the ignition OFF before connecting the Scanner to or d
18. isconnecting the Scanner from the vehicle s Data Link Connector DLC To prevent damage to the onboard computer when taking vehicle electrical measurements always use a digital multimeter with at least 10 megOhms of impedance Fuel and battery vapors are highly flammable To prevent an explosion keep all sparks heated items and open flames away from the battery and fuel fuel vapors DO NOT SMOKE NEAR THE VEHICLE DURING TESTING Don t wear loose clothing or jewelry when working on an engine Loose clothing can be become caught in the fan pulleys belts etc Jewelry is highly conductive and can cause severe burn if it makes contact between a power source and ground D900 Functions on all OBDII compliant vehicles 2 INTRODUCTION 2 1 On Board Diagnostics OBD The OBDII Scan Tool is designed to work on all OBDII compliant vehicles All 1996 and newer vehicles cars light trucks and SUVs sold in the United States are OBDII compliant One of the most exciting improvements in the automobile industry was the addition of on board diagnostics OBD on vehicles or in more basic terms the computer that activates the vehicle s CHECK ENGINE light OBDI was designed to monitor manu facturer specific systems on vehicles builtfrom 1981 to 1995 Then came the develop ment of OBDII which is on all 1996 cars and light trucks sold in the U S Like its predecessor OBDII was adopted as part of a government mandate to lower vehicle emi
19. m the computer s memory as follows When DTCs are erased from the vehicle s computer memory the I M Readiness Monitor Status program resets the status of all Monitors to a not run flashing condition To set all of the Monitors to a DONE status an OBDII Drive Cycle must be performed Refer to your vehicle s service manual for information on how to perform an OBDII Drive Cycle for the vehicle under test The Scan Tool must be connected to the vehicle s DLC to erase the codes from the computer s memory 1 Press Erase DTCs from the main menu A Erasing clears all DTCs Freeze Frame Data and resets IM Monitors Are you sure message shows on the display HM Ifyou are sure you want to proceed press the ENTER button to erase DTCs from the vehicle s computer If you do not want to continue with the erase process press the ESC button to exit the erase mode 2 If you chose to erase DTCs a progress screen displays while the erase function is in progress 17 D900 Functions on all OBDII compliant vehicles W Ifthe erase was successful a Erase is successful message shows on the display Press the ESC button to return to the main menu HM If the erase was not successful an Erase has Failed message shows on the display Verify that the Scan Tool is properly connected to the vehicle s DLC and that the ignition is on then repeat steps 1 above Erasing DTCs does not fix the problem s that caused the code s to
20. ns on all OBDII compliant vehicles 7 After successful connection please wait until the main menu shows up Read DTCs Erase DTCs Live Data Freeze Frame MIL Status I M Readiness Vehicle Info 15 D900 Functions on all OBDII compliant vehicles 4 2 Read Diagnostic Trouble Codes DTCs Select Read DTCs from the main menu The Read DTCs function s display shows DTCs from the vehicle s computer Trouble Code Trouble Code Number Trouble Code Count Trouble Code Define GIE icon Generic DTC Enhanced DTC PENDING icon the DTC is a pending code The Scan Tool will display a code only if codes are present in the vehicle s computer memory If no codes are present a No DTCs are presently stored in the vehicle s computer message is displayed The Scan Tool is capable of retrieving and storing up to 30 codes in memory for immediate or later viewing 16 D900 Functions on all OBDII compliant vehicles 4 3 Erase Diagnostic Trouble Codes DTCs Select Erase DTCs from the main menu When the Scan Tool s ERASE function is used to erase DTCs from the vehicle s on board computer Freeze Frame data and manufacturer specific enhanced data are also erased If you plan to take the vehicle to a Service Center for repair DO NOT erase the codes from the vehicle s computer If the codes are erased valuable information that might help the technician troubleshoot the problem will also be erased Erase DTCs fro
21. ssions But what makes OBDII unique is its universal application for all late model cars and trucks domestic and import This sophisticated program in the vehicle s main computer system is designed to detect failures in a range of systems and can be accessed through a universal OBDII port which is usually found under the dashboard For all OBD systems if a problem is found the computer turns on the CHECK ENGINE light to warn the driver and sets a Diagnostic Trouble Code DTC to identify where the problem occurred A special diagnostic tool such as the OBDII Scan Tool is required to retrieve these codes which consumers and professionals use as a Starting point for repairs D900 Functions on all OBDII compliant vehicles 2 2 Vehicles Covered The OBDII Scan Tool is designed to work on all OBDII compliant vehicles All 1996 and newer vehicles cars and light trucks sold in the United States are OBDII compliant Federal law requires that all 1996 and newer cars and light trucks sold in the United States must be OBDII compliant this includes all Domestic Asian and European vehicles Some 1994 and 1995 vehicles are OBDII compliant To find out if a 1994 or 1995 vehicle is OBDII compliant check the following 1 The Vehicle Emissions Control Information VECI Label This label is located under the hood or by the radiator of most vehicles If the vehicle is OBDII compliant the label will state OBDII Certified V
22. to perform diagnosis and testing of their assigned engine area system have been met and all diagnostic testing has completed successfully Monitors with a Has Not Run status have not yet met the conditions they need to perform diagnosis and testing of their assigned engine area system and have not been able to perform diagnostic testing on that system Using the I M Readiness Monitor Status to Confirm a Repair The I M Readiness Monitor Status function can be used after repair 25 D900 Functions on all OBDII compliant vehicles of a fault has been performed to confirm that the repair has been performed correctly and or to check for Monitor Run Status Use the following procedure to determine I M Readiness Monitor Status 1 Using retrieved Diagnostic Trouble Codes DTCs and code definitions as a guide and following manufacturer s repair procedures repair the fault or faults as instructed 2 After the fault or faults have been repaired connect the Scan Tool to the vehicle s DLC and erase the code or codes from the vehicle s computer memory 3 After the erase procedure is performed most of the Monitor icons on the Scan Tool s display will be flashing Leave the Scan Tool connected to the vehicle and perform a Trip Drive Cycle for each flashing Monitor Misfire Fuel and Comprehensive Component Monitors run continuously and their icons will always be on solid even after the erase function is performed M Fach
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