ALM-Gauge Manual
Contents
1. vV Vinil M MAP V Vin2 WLAP Sensors T I 1 Bar M 2 5 Bar Er Eist AFR mode ANOUT used to indicate changes in AFR the default setting 0 00 Volt at AFR 7 35 5 00 Volt at AFR 29 4 02 Sensor 1 Linear Relation Fuel Type 0 00 Voll at AFR 1 5 00 Vol at AFR2 Enable diagnostics of Linearized analog output O2 Sensor 2 Linear Relation I Lambda IV AFR TF O2 _ Enable diagnostics of Linearized analog output Gauge Settings 1 00 Voll AFR Min 10 00 0 00 Vol2 AFRMax 20 00 Gasoline X Gasoline X ALM Hardware Version Number of Sensors 1 Hardware Version ALM Gauge Stroke Number of Strokes 4 Select Voltage Input k Vinil O2 Sensor 1 O2 Sensor 2 C MAP IV Vinz i EGI IVLAP Sensors J I 1Bar M 2 5 Bar O2 mode ANOUT used to indicate changes in O2 the default setting 0 00 Volt at O2 20 99 000 Vell a AFR2 735 200 Voll a AER 29 40 r T Ee Gauge Settings 100 Voll AER 10 00 000 Vol2 AFR Max 20 00 E Fuel Type 2 Sensor Gasoline hd Gasc ne ALM Hardware Version Number of Sensors fi Hardware Version AL Si Gaste O2 Sensor 2 Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 If customers want to modify these parameters customers can refer to ALM GUI Manual 2 4 AL2. ANOUT to ECU Performance Switch input Follow the following steps to connect 1 Unplug the ECU Performance switch 2 ALM S ANOUT blue line is connected to the white line of the Performance Switch 3 ALM S analog GND black line is connected to the Performance Switch of GND green line 4 ANOUT the output voltage from OV to 5V and does not need to be modified it will be varied in accordance with the variation of the lambda Note performance switch then can not be used to swap the fuel maps any more You can always connect back to Performance Switch after the tuning is done ALM is disconnected 5 4 ANOUT Calibration Lambda mode ANOUT used to indicate changes in lambda the default setting 0 00 Volt at Lambda 0 50 5 00 Volt at Lambda 2 00 Accurate Lambda Meter Daughter Gauge O2 Sensor l Linear Relation ALM Gauge Manual V2 2 0 00 Voll at Lambda 1 0 50 5 00 Moi at Lambda 2 2 00 C O2 J Enable diagnostics of Linearized analog output O2 Sensor 2 Linear Relation 0 00 Moi at AFR2 735 5 00 Voll at AFR1 29 40 M Lambda V AFR O O2 _ Enable diagno stics of Linearized analog output Gauge Settings 1 00 Moll AFR CMin 10 00 0 00 Vol2 AFR Max 20 00 Fuel Type Ewe ALM Hardware Version Number of Sensors hoo A Hardware Version AL M Gauge _ Stroke Number of Strokes 4 Select Voltage Input O2 Sensor 1 O2 Sensor 2
3. installation of the oxygen sensors is a must to avoid sensor damage It protects the oxygen sensor from condensations and gives the sensor longer life It also can make the measurement more accurate The sensor body should be perpendicular to the exhaust gas flow and it should also be tilted in the range of 10 75 from the horizontal line see below figure The typical tilt angle is 30 The sensor head should be close to the center of the exhaust pipe After finding the right location on the exhaust pipe drill a hole of 18 mm in diameter Weld the sensor bung on it Note do not weld the bung with the sensor in it Note if you vehicle has a Bosch switching oxygen sensor LSF on your vehicle you can just un plug the LSF and plug in the wideband LSU sensor into the hole Bosch LSU and LSF have the same size of the thread More User Notes A LSU sensors are not designed to work with leaded gasoline Using LSU sensor with leaded gasoline will reduce the sensor life A With the LSU sensor installed in the exhaust pipe whenever the engine is running please also run ALM Gauge which controls the LSU heater Otherwise long time running engine with LSU sensor not heated can cause damage of the sensor LSU sensor is preferred to run within the temperature range of 500 900 C the best temperature is 780 C Too high temperature gt 1030 C will cause damage of the sensor Refer to Bosch LSU4 9 data for more details about the varia
4. Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 ECOTRONS ALM Gauge Accurate Lambda Meter __with a separate gauge Manual V2 2 ECTORONS LLC COPY RIGHT ECOTRONS LLC ALL RIGHT RESERVED www ecotrons com Copyright ECOTRONS LLC Page 1 of 20 Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Check before you power on ALM Gauge e The oxygen sensor is installed in the right way or if it s left in the free air make sure it s dry and it s not close to the inflammable materials The ALM Gauge is correctly connected to DC power supply or 12V battery Website http www ecotrons com Email info ecotrons com www ecotrons com Copyright ECOTRONS LLC Page 2 of 20 Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 ALM Gauge included parts USB connectivity CH Controller with CJ125 Harness iT 52mm digital LED Gauge d _ Bosch LSU4 9 Stainless Bung Software and Documents sensor and Plug TRC Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Table of Content Chapter 1 ALM Gauge Product Overview ege dee e 5 Chapter 2 ALM Gauge technical specfcatnong sssrinin nennen innia iiaei aiai 7 Chapter 3 Ap pe aban eran SIZ 6 arated ses eaicantet ce taseehence aes ee 9 Chapter 4 Protect your OXY SEN SCNSOF cmene E E R E 10 Chapter 5 ALM Gatse hardware connechhOn scheint EE eae 11 SEENEN 11 D2 COMME CTIOM OV CLV Le W ieia aiaia i eia i e i a o
5. M GUI using COM or USB communication http www ecotrons com files ALM 20GUI 20Manual pdf Note The limit range of analog voltage is 0 5v The value of lambda is 0 5 16 The low voltage must match the low Lambda You can t make 5V match 0 5 Lambda AFR and O2 are same with Lambda How to verify analog voltage matching lambda Since you have 2 ALMs the way to compare is easy You can either cross check 2 ALMs with the same sensor or check 2 sensors with 1 ALM And the next step to check good lambda 1 Put the sensor in the free air and use ALM GUI to read the O2 if it is close to 20 the ALM and sensor is good otherwise you could do Free air calibration 2 If ALM GUI gives good 02 then measure the ANOUT analog voltage with a voltage meter convert that voltage back to lambda and compare it against the lambda in the ALM GUI This is to verify the analog voltage is really matching the lambda measured Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter6 DIGITAL AIR FUEL RATIO MONITOR Gauge 6 1 Specification 1 Input Voltage O Iv 2 Display Range digital type is from 20 0 to 10 0 analog LED type is from 20 0 to 10 0 both of digital type and analog LED type will show the maximum or the minimum if the value out off the display range 3 Accurately of digital type Every 0 1 4 Accurately of analog LED type Every 0 5 using BAR type to light up 6 2 Application 1 General Display T
6. acy Heater Control Built in PID control with CJ125 Current Typical 1A Max 1 5A Heater return H Separate wire from Ground Response time 5ms updating rate everything finished in Sms Output Lambda analog output 0 5V user programmable Analog accuracy 0 005V error with a 10 bit DAC chip Analog type Reference ground to ECU Second Lambda analog output O SV for a third party gauge user programmable Narrow band O2 sensor simulated output Input RPM input Injection pick up Communications Advanced CAN bus communications optional RS232 or USB via a converter for logging or programming User friendly PC software for data acquisitions and analysis Display 52mm digital gauge with numbers in the censor and bar graph LED around Main Processor CPU Freescale MC9S12P128 16 bit micro processor S12P Auto industry rated Speed 32MHz Memory 128k Flash 6k RAM 4k Data Special features On Board Diagnosis and error report Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Self learning of part to part variations aging effect Working with different types of fuels gasoline diesel E85 etc General Temperature range 40 C 125 C Dimensions 4 0 x 2 6 x 1 0 Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter 3 Appearance and size Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter A Protect your oxygen sensor Installation Correct
7. er supply Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Power supply and ANOUT 4 Connect the 12V to 12V battery minus or the DC power supply 5 If you do not want to output the lambda analog signal to your ECU connect the GND reference ground pin4 to the 12V battery minus or DC power supply ground otherwise refer to step 4 5 for GND connection 6 If you want to output the lambda analog signal to your ECU connect the ALM Gauge lambda analog output to your ECU analog input and then you must connect the ALM Gauge GND reference ground pin4 to the ECU analog GND most likely your ECU has a sensor ground for analog inputs 7 Optional Splice the injector driver wire on the ECU side usually low side driver type and tap the ALM Gauge RPM input wire to it Use the electrical tape to wrap it RPM COM and NBOUT 8 Optional connect the switching O2 sensor simulated output NBOUT to the OEM ECU This can prevent the OEM ECU turn on the MIL light Note the OEM switching sensor can be different from each other and it s your responsibility to figure out how to connect the wires Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 correctly 9 Optional connect ALM Gauge to your laptop PC via the serial communication cable DB9 connector If you computer does not have a serial port you need an extra USB RS232 converter 10 Users can set the ANOUT output AFR or Lambda We will set it in
8. he digital display will show the percentage and value is corresponding with analog LED 2 Electrics voltage display amp warning function A When at the start Red LED for VOLT only will light up and digital display will show the value of voltage at 30 seconds After then the digital display will show the value of AIR FUEL Every 10 minutes show the voltage at 30 seconds B When the voltage is lower than 11 0v Red LED for VOLT only will shine and the digital display will show the value and keeping shine to warning C When the value of AIR FUEL is lower than 10AFR or higher than 20AFR over 3 seconds the digital display will keeping shine to warning Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter 7 DTC table Below is the Diagnostic Trouble Code table ALM Gauge has on board diagnostics capability to detect most common errors The first thing user should do when ALM Gauge is not working appropriately is to read DTCs Trouble Deccan Code escription Solutions Internal communication error Contact the manufacturer Internal register error Contact the manufacturer Check the harness for short to power Change the LSU LSU yellow wire VM short to power Check the harness for short to ground Change the LSU LSU yellow wire VM short to GND Check the harness for short to power Change the LSU ee LSU black wire UN short to GND Check the harness for short to ground LSU black wire UN sho
9. mendhdaebends 12 5 5 Connection ALM to Ee 15 5 3 LALM connection Via NB O2 EIDEN seenen a a comestoseeindee 15 5 3 2 Connect ALM to ECU via performance SWItCH csse E EEE 16 JAANOUT Cali Drain E 16 5 5 How to verify analog voltage matching lambda ccecccccccccsssssssseseseeeeeeceeeeeeeeeeeeaaaeeeeseees 18 Chapter 6 DIGITAL AIR FUEL RATIO MONITOR Gauge eeceeesessesennteeeeeeeeeeeeeeeeeeeeeeeeens 19 GU SS CITC ELE 19 OZ ADDI CANIOM E 19 i ees 0 Cor apr Eeer 20 Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter 1 ALM Gauge Product Overview ALM Accurate Lambda Meter is an air fuel ratio lambda meter which uses Bosch LSU 4 9 wideband oxygen sensor and Bosch driver chip CJ125 to accurately measure the exhaust air fuel ratio AFR of variant combustion engines ALM Gauge is a smaller size version of our previous ALM It has the same accuracy and fast response characteristics like ALM but much smaller size The controller box has the size of 4 x2 6 x1 or similar to a business card size It has a primary O 5v linear analog output which can be used as the feedback control signal for an ECU It also has an analog signal output to the 52mm digital LED gauge The gauge is optional because some professional tuners already have a lot of gauges which include AFR display as a part ALM Gauge uses more advanced LSU4 9 sensor instead of LSU4 2 which is still used by most other wideband controllers LSU4 9 is
10. nt temperature requirements www bosch motorsport de pdf sensors lambda LSU49 paf A Avoid heating the LSU sensor before the engine is running At the engine start there may be condensations in the exhaust gas which can cause damage of the sensor The preferred order start the engine first then immediately turn on the ALM Gauge which will ramp up the heating power smoothly Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter5 ALM Gauge hardware connection 5 1 ALM Gauge main connector pin out O2 Sensor Op RS232 1 O GAUGE ge injection signal input 0V caucr 2 Rea av ANo sv iv 2 frea kv H2VPowersupy lm AECH i Ip I O2 Sensor wideband oxygen sensor input 6 Bik n Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Note LSU4 9 pin out numbers are different than LSU4 2 but they have the same color scheme 5 2 Connection overview 1 GND H Lambda analog output Computer wide band ECU Batteries oxygen sensors Lambda Analog Output not connected Computer wide band Batteries oxygen sensors Plug in the four connectors from the harness into ALM Gauge Connect Gauge to your ALM Gauge Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Gauge 2 Connect the 6 pin LSU4 9 mating connector to the O2 sensor mmm E a me OI Il ORG Connector to the O2 sensor 3 Connect the 12V to 12V battery plus or the DC pow
11. onal Bosch LSU 4 9 sensor Sensor plug and bung USB to serial converter included CD documents and ALM GUI software 999 OOF Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Virtual 02 Sensor Exhaust Exhaust Engine narrow band o2 Channels temperature pressure Speed sensor Communication Display supported ANOUT Range 02 Sensor Supported sensor sensor Input output NBOUT tere ALM B ANOUT Products BEE DESEN ALM B RS485 mu LSU 4 9 default ADV vun ware oe ris 0 64 18 tt ALM CAN LSU 4 9 default ADV ALM CAN T1 SE ALATA R232 1 co azes6a YES 0 5v at 4 9 defaule ADY ALM LD RS232 CAN USB LCD 640 480 YES 0 10v LSU 4 9 defaul t ADV Note Blue font represents the current user manual supported of ALM units Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 Chapter 2 ALM Gauge technical specifications Power supply Input voltage range DC9V 15 V 12V Typical Input current 90mA typical plus the heater current Polarity protection Reverse polarity protected Load Dump Clamp Maximum Voltage 33V Sensors Compatible LSU4 9 Support LSU4 9D LSU 4 2 capable but not recommended Number of Sensors One Free air calibration No need we measure the free air O2 Measurement Lambda range 0 5 Gasoline AFR 7 35 to free air Lambda accuracy 0 008 A 1 00 0 01 A 0 80 0 05 A 1 70 Air Fuel Ratio Fuel dependent see lambda range and accur
12. our factory according to the uses requirement The standard ANOUT output is AFR If users want it to output lambda or O2 users can modify it by using ALM GUI Connected ALM Board to computer click Settings gt ALM Parameters open ALM Parameters window You can select what you want to modify the ANOUT output and Burn to ALM 5 3 Connection ALM to ECU There are 2 ways to connect ALM to Ecotrons ECU e Connected via NB O2 connector e Connected via performance switch We recommend the first connection 5 3 1 ALM connection via NB O2 connector From left to right in the picture Heater circuit Blue Yellow Heater circuit Blue e Reference Ground Green O2in O2 sensor input Gray Black 8 Our ALM Gauge harness comes with 2 wires ANOUT Blue analog output representing the lambda GND Black reference ground You need to connect the ANOUT Blue to O2in Gray Black 8 and GND Black to Ground Green Accurate Lambda Meter Daughter Gauge ALM Gauge Manual V2 2 5 3 2 Connect ALM to ECU via performance switch For some two stroke engines maybe there is no NB O2 sensor when buy the EFI kits so it doesn t have NB O2 sensor connector on the harness it only has a performance switch But for tuning it needs to install a wideband O2 sensor ALM so you can connect the ALM to ECU via performance switch then ECU can read the Lambda Computer ECU Batteries You need to connect the ALM S
13. rt to power Change the LSU LSU green wire IA short to power Check the harness for short to power Change the LSU LSU green wire IA short to GND Check the harness for short to ground Change the LSU Operating voltage too low Check the power supply to the ALM spec Heater circuit damaged Contact the manufacturer Heater circuit short to power Contact the manufacturer 1 Check the harness for short to ground E Heater circuit short to GND 2 change LSU 3 Contact the manufacturer El E2 E gt EA Ei E6 E7 E8 E9 E10 Ell 12
14. the new generation wideband sensor evolving from LSU4 2 It is superior to LSU4 2 with the obvious proof Bosch uses LSU4 9 across the board for their wideband applications See the appendix LSU4 2 vs LSU4 9 for a quick comparison Here is why LSU4 9 is superior to LSU4 2 http www ecotrons com technology bosch_lsu_49_is_superior_to_lsu_42_sensors ALM Gauge can also use LSU4 9D sensor but the need to update the software if you need to use LSU4 9D please explain in advance at the time of purchase ALM Bosch chip CJ125 is the integrated chip IC specifically designed for LSU 4 9 4 2 Sensors Bosch s own wideband controller LambdaTronic uses CJ125 driver chip In fact Bosch uses this chip wherever a LSU sensor is used The CJ125 and LSU sensor are mated pair by Bosch Presumably LSU sensors work the best with CJ125 chips See here for Bosch Motorsport s wideband controller LT4 http www bosch motorsport de media catalog_resources Function_Manual_LT4pdf pdtf Together LSU 4 9 and CJ125 make our ALM a more accurate lambda meter in the automotive aftermarket Besides air fuel ratio measurement ALM Gauge provides some supplemental functions which make your measurement or tuning more convenient linear analog output to your ECU LED digital display engine RPM probe data logging with a serial communication to a PC etc List of ALM parts Small ALM controller 52mm digital LED gauge optional Harness 60in default 1201n opti
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