Home ReviewsRefund
Home/Lexus/GS/Lexus GS III facelift (2007-2011)/Repair manual/Suspension Control Systems/Adaptive Variable Suspension System (Diagnostic Codes & Sym…
Contents Wiring diagrams Section: Suspension Control Systems All sections

Adaptive Variable Suspension System (Diagnostic Codes & Symptom Tests): Diagnosis Lexus GS III facelift

Suspension Control Systems 16 illustrations ~4291 words

INSPECTION PROCEDURE

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .
  2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-382797-S37729540352011012800000) .

Scheme 28

Scheme 28: PROCEDURE
Scheme 28: PROCEDURE

Scheme 29

Scheme 29
Scheme 29

Scheme 30

Scheme 30
Scheme 30

Scheme 31

Scheme 31
Scheme 31
  1. READ VALUE OF TECHSTREAM Connect Techstream to DLC3. Turn the engine switch on (IG) and turn the Techstream main switch on. Select "DATA LIST" mode on Techstream Refer to «DATA LIST / ACTIVE TEST»(ref-382796-S17094436822011012800000) . DATA LIST (EMS): Item Measurement Item/ Range (Display) Normal Condition Diagnostic Note G (Up & Down) Sensor FR G (up & down) FR sensor reading / min.: -1045267.3 mm/s 2 , max.: 1045299.2 mm/s 2 -8,820 mm/s 2 to 980 mm/s 2 at still condition Reading changes when the vehicle (FR) is bounced G (Up & Down) Sensor FL G (up & down) FL sensor reading / min.: -1045267.3 mm/s 2 , max.: 1045299.2 mm/s 2 -8,820 mm/s 2 to 980 mm/s 2 at still condition Reading changes when the vehicle (FL) is bounced G (Up & Down) Sensor Rear G (up & down) rear sensor reading / min.: -1045267.3 mm/s 2 , max.: 1045299.2 mm/s 2 -8,820 mm/s 2 to 980 mm/s 2 at still condition Reading changes when the vehicle (rear) is bounced Check that the value of the acceleration sensor read on Techstream changes as the vehicle is bounced. OK Acceleration value must change. Result Result Proceed to OK A NG (Front right) A NG (Front left) B NG (Rear) C C --> See step 4 B --> See step 3 A: Go to next step
  2. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Perform a road test. Check if the same DTC is detected Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is output A DTC is not output (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU
  3. INSPECT ACCELERATION SENSOR ASSEMBLY (LEFT FRONT) Remove the left front acceleration sensor assembly Refer to «REMOVAL»(ref-382798-S35605643702011012800000) . Connect 3 1.5 V dry batteries in series. Connect terminal 3 (SGB) to the front battery's positive (+) terminal, and terminal 2 (SGG) to the rear battery's negative (-) terminal. Measure the voltage according to the value(s) in the table below. Voltage Tester connection Sensor condition Voltage SGFL (1) - SGG (2) Sensor stationary Approx. 2.3 V SGFL (1) - SGG (2) Sensor vibrating vertically Change between approx. 1.0 to 4.0 V NOTE: Do not apply a voltage of more than 6 V. Do not drop the acceleration sensor assembly. If it is dropped, replace it with a new one. The acceleration sensor assembly removed from the vehicle must not be placed upside down. HINT: When the acceleration sensor assembly is tilted, it may output a different value. NG --> REPLACE ACCELERATION SENSOR ASSEMBLY OK --> GO TO STEP 5
  4. INSPECT ACCELERATION SENSOR ASSEMBLY (REAR) Remove the rear acceleration sensor assembly Refer to «REMOVAL»(ref-382798-S36945253352011012800000) . Connect the 3 1.5 V dry batteries in series. Connect terminal 3 (SGV) to the front battery's positive (+) terminal, and terminal 2 (SGND) to the rear battery's negative (-) terminal. Measure the voltage according to the value(s) in the table below. Voltage Tester connection Sensor condition Voltage SGRR (1) - SGND (2) Sensor stationary Approx. 2.3 V SGRR (1) - SGND (2) Sensor vibrating vertically Change between approx. 1.0 to 4.0 V NOTE: Do not apply a voltage of more than 6 V. Do not drop the acceleration sensor assembly. If it is dropped, replace it with a new one. The acceleration sensor assembly removed from the vehicle must not be placed upside down. HINT: When the acceleration sensor is tilted, it may output the different value. NG --> REPLACE ACCELERATION SENSOR ASSEMBLY OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL ECU TO ACCELERATION SENSOR ASSEMBLY) Front: (C1716, C1792) Disconnect the absorber control ECU connector and acceleration sensor assembly connector. Measure the resistance according to the value(s) in the table below. Resistance Tester connection Specified condition U2-29 (SGFL) - K24-1 (SGFL) Below 1 ohms U2-11 (SGL3) - K24-2 (SGG) Below 1 ohms U2-16 (SBL3) - K24-3 (SGB) Below 1 ohms U2-29 (SGFL) - Body ground 10 kohms or higher U2-11 (SGL3) - Body ground 10 kohms or higher U2-16 (SBL3) - Body ground 10 kohms or higher REAR: (C1717, C1793) Measure the resistance according to the value(s) in the table below. Resistance Tester connection Specified condition U2-27 (SGRR) - U26-1 (SGRR) Below 1 ohms U2-12 (SGR3) - U26-2 (SGND) Below 1 ohms U2-15 (SBR3) - U26-3 (SGV) Below 1 ohms U2-27 (SGRR) - Body ground 10 kohms or higher U2-12 (SGR3) - Body ground 10 kohms or higher U2-15 (SBR3) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  6. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Perform a road test. Check if the same DTC is detected Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . HINT: Reinstall the sensor, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs. Result Result Proceed to DTC is output A DTC is not output (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .
  2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-382797-S37729540352011012800000) .

Scheme 32

Scheme 32: PROCEDURE
Scheme 32: PROCEDURE

Scheme 33

Scheme 33
Scheme 33
  1. INSPECT ABSORBER CONTROL ACTUATOR OPERATION Connect Techstream to DLC3. Turn the engine switch on (IG) and turn Techstream main switch on. Select "ACTIVE TEST" mode on Techstream Refer to «DATA LIST / ACTIVE TEST»(ref-382796-S17094436822011012800000) . ACTIVE TEST (EMS): Item Vehicle Condition / Test Details Diagnostic Note Damper Step FR Changes damper step / min.: 1 step, max.: 17 step Shock absorber hardens as damper step increases Damper Step FL Changes damper step / min.: 1 step, max.: 17 step Shock absorber hardens as damper step increases Damper Step RR Changes damper step / min.: 1 step, max.: 17 step Shock absorber hardens as damper step increases Damper Step RL Changes damper step / min.: 1 step, max.: 17 step Shock absorber hardens as damper step increases Check if the absorber control actuator operates to harden the suspension with Techstream. OK The absorber control actuator operates. HINT: The operation of the absorber control actuator can be checked at OPERATION CHECK Refer to «OPERATION CHECK»(ref-382796-S35499119502011012800000) . OK The absorber control actuator operates normally. NG --> See step 3 OK: Go to next step
  2. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Perform a road test. Check that the same DTC is recorded Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is output A DTC is not output (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU
  3. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL ACTUATOR CIRCUIT) Disconnect the absorber control ECU connector and absorber control actuator connector. Measure the resistance according to the value(s) in the table below. Resistance C1725 (Front LH) Tester Connection Specified Condition A52-5 (FAL+) - A12-2 (A+) Below 1 ohms A52-14 (FAL-) - A12-5 (A-) Below 1 ohms A52-6 (FBL+) - A12-1 (B+) Below 1 ohms A52-16 (FBL-) - A12-4 (B-) Below 1 ohms A52-5 (FAL+) - Body ground 10 kohms or higher A52-6 (FBL+) - Body ground 10 kohms or higher A52-14 (FAL-) - Body ground 10 kohms or higher A52-16 (FBL-) - Body ground 10 kohms or higher A12-3 (E) - Body ground Below 1 ohms Resistance C1726 (Front RH) Tester Connection Specified Condition A52-1 (FAR+) - A26-2 (A+) Below 1 ohms A52-2 (FAR-) - A26-5 (A-) Below 1 ohms A52-3 (FBR+) - A26-1 (B+) Below 1 ohms A52-4 (FBR-) - A26-4 (B-) Below 1 ohms A52-1 (FAR+) - Body ground 10 kohms or higher A52-2 (FAR-) - Body ground 10 kohms or higher A52-3 (FBR+) - Body ground 10 kohms or higher A52-4 (FBR-) - Body ground 10 kohms or higher A26-3 (E) - Body ground Below 1 ohms Resistance C1727 (Rear LH) Tester Connection Specified Condition U2-6 (RAL+) - V28-2 (A+) Below 1 ohms U2-7 (RAL-) - V28-5 (A-) Below 1 ohms U2-8 (RBL+) - V28-1 (B+) Below 1 ohms U2-9 (RBL-) - V28-4 (B-) Below 1 ohms U2-6 (RAL+) - Body ground 10 kohms or higher U2-7 (RAL-) - Body ground 10 kohms or higher U2-8 (RBL+) - Body ground 10 kohms or higher U2-9 (RBL-) - Body ground 10 kohms or higher V28-3 (E) - Body ground Below 1 ohms Resistance C1728 (Rear RH) Tester Connection Specified Condition U2-2 (RAR+) - U24-2 (A+) Below 1 ohms U2-3 (RAR-) - U24-5 (A-) Below 1 ohms U2-4 (RBR+) - U24-1 (B+) Below 1 ohms U2-5 (RBR-) - U24-4 (B-) Below 1 ohms U2-2 (RAR+) - Body ground 10 kohms or higher U2-3 (RAR-) - Body ground 10 kohms or higher U2-4 (RBR+) - Body ground 10 kohms or higher U2-5 (RBR-) - Body ground 10 kohms or higher U24-3 (E) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ABSORBER CONTROL ACTUATOR TO ABSORBER CONTROL ECU) OK: Go to next step
  4. INSPECT ABSORBER CONTROL ACTUATOR (EACH ABSORBER CONTROL ACTUATOR) SHAFT STOP POSITION CHECK Remove the absorber control actuator. Refer to «REMOVAL - Step 8»(ref-382575-S34131188072011012800000) for front. Refer to «REMOVAL - Step 13»(ref-382575-S08937114122011012800000) for rear). Connect the connector to the absorber control actuator. Check absorber control actuator operation Refer to «OPERATION CHECK»(ref-382796-S35499119502011012800000) . Shift to the Test Mode and start the engine. Check the shaft rotation when depressing the brake pedal. OK The shaft rotates by 15°. HINT: The shaft rotates from the hard to soft position by 15° up to a maximum angle of 120° every time the brake pedal is depressed. ACTUATOR CHECK Disconnect the absorber control actuator connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition 1 (B+) - 3 (GND) 12.0 to 12.8 ohms 2 (A+) - 3 (GND) 12.0 to 12.8 ohms 4 (B-) - 3 (GND) 12.0 to 12.8 ohms 5 (A-) - 3 (GND) 12.0 to 12.8 ohms NG --> REPLACE ABSORBER CONTROL ACTUATOR OK: Go to next step
  5. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Perform a road test. Check that the same DTC is recorded Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . HINT: Reinstall the sensor connector, etc. and restore the vehicle to its prior condition before rechecking for DTCs. Result Result Proceed to DTC is output A DTC is not output (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .
  2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-382797-S37729540352011012800000) .

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

Check the condition of each related circuit connector before troubleshooting Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

Scheme 34

Scheme 34: PROCEDURE
Scheme 34: PROCEDURE

Scheme 35

Scheme 35
Scheme 35
  1. INSPECT BATTERY VOLTAGE Check the battery voltage. Voltage 10 to 14 V NG --> CHECK CHARGING SYSTEM OK: Go to next step
  2. INSPECT FUSE (AIR SUS FUSE) Remove the AIR SUS fuse from the cowl side J/B RH. Check continuity of AIR SUS fuse. OK Continuity exists NG --> REPLACE AIR SUS FUSE OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (B CIRCUIT) Disconnect the absorber control ECU connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition K72-1 (B) - Body ground Engine switch on (IG) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (B CIRCUIT) OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (GND CIRCUIT) Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K72-4 (GND) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
  5. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Start the engine. Check if the same DTC is recorded Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . HINT: Reinstall the sensor, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs. Result Result Proceed to DTC is output A DTC is not output (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .
  2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-382797-S37729540352011012800000) .

HINT

  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .
  2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-382797-S37729540352011012800000) .

Scheme 36

Scheme 36: PROCEDURE
Scheme 36: PROCEDURE
  1. CHECK DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Turn the engine switch off. Turn the engine switch on (IG) again and check that no CAN communication system DTC is output. Start the engine. Drive the vehicle and turn the steering wheel to the right and left at the speed of 24 mph (35 km/h) to check that a DTC is output Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) , Refer to «DTC CHECK / CLEAR»(ref-382790-S21075298622011012800000) (2GR-FSE) and Refer to «DTC CHECK / CLEAR»(ref-382793-S21584973372011012800000) (1UR-FSE)). Result Result Proceed to Only DTC C1777 is output A CAN communication system DTC is output B Steering angle sensor DTC is output (Brake control system trouble code C1231/31) C C --> REPAIR CIRCUIT INDICATED BY OUTPUT CODE B --> REPAIR CIRCUIT INDICATED BY OUTPUT CODE A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR INPUT VOLTAGE) Disconnect the steering angle sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition K19-1 (IG) - K19-2 (ESS) Engine switch on (IG) 10 to 14 V Turn the engine switch off. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K19-2 (ESS) - Body ground Below 1 ohms Result Result Proceed to OK A OK (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B NG C C --> REPAIR OR REPLACE HARNESS OR CONNECTOR B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE STEERING ANGLE SENSOR

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .
  2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-382797-S37729540352011012800000) .

Scheme 37

Scheme 37: PROCEDURE
Scheme 37: PROCEDURE

Scheme 38

Scheme 38
Scheme 38
  1. READ VALUE OF TECHSTREAM Connect Techstream to DLC3. Turn the engine switch on (IG) and turn Techstream main switch on. Select "DATA LIST" mode on Techstream Refer to «DATA LIST / ACTIVE TEST»(ref-382796-S17094436822011012800000) . DATA LIST (EMS): Item Measurement Item/ Range (Display) Normal Condition Diagnostic Note Damper Force Switch 1 Damper force switch 1/ ON or OFF The same as absorber control switch position Operate the absorber control switch Operate the absorber control switch and check its operation in the DATA LIST on Techstream display. OK The display on Techstream changes according to the operation of the absorber control switch. NG --> See step 3 OK: Go to next step
  2. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Perform the Test Mode Refer to «TEST MODE PROCEDURE»(ref-382796-S09396953722011012800000) . Check if the same DTC is recorded Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is output A DTC is not output (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU
  3. INSPECT ABSORBER CONTROL SWITCH Remove the absorber control switch. Disconnect the absorber control switch connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Switch Position Specified Condition Switch terminal 4 - Switch terminal 3 NORM 10 kohms or higher (No Continuity) Switch terminal 4 - Switch terminal 3 SPORT Below 1 ohms (Continuity) NG --> REPLACE ABSORBER CONTROL SWITCH OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL SWITCH TO ABSORBER CONTROL ECU, BODY GROUND) Disconnect the absorber control ECU connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K72-9 (SW1) - K41-4 Below 1 ohms K72-9 (SW1) - Body ground 10 kohms or higher Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K41-3 - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. RECONFIRM DTC Clear the DTC Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Perform Test Mode Refer to «TEST MODE PROCEDURE»(ref-382796-S09396953722011012800000) . Check if the same DTC is recorded Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . HINT: Reinstall the sensor, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs. Result Result Proceed to DTC is output A DTC is not output (When troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Start the inspection from step 3 when troubleshooting accordance with the PROBLEM SYMPTOMS TABLE.
  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

  1. Start the inspection from step 2 when troubleshooting accordance with the PROBLEM SYMPTOMS TABLE.
  1. Check the condition of each related circuit connector before troubleshooting Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-382578-S08578392522011012800000) .

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

Check the condition of each related circuit connector before troubleshooting Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

Scheme 39

Scheme 39: PROCEDURE
Scheme 39: PROCEDURE

Scheme 40

Scheme 40
Scheme 40

Scheme 41

Scheme 41
Scheme 41
  1. INSPECT TERMINAL VOLTAGE (DLC3 TC TERMINAL VOLTAGE) Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition K16-13 (TC) - K16-4 (CG) Engine switch on (IG) 10 to 14 V Turn the engine switch off. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> See step 4 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (ECM TO DLC3) Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition A7-3 (TC) - K16-13 (TC) Below 1 ohms K16-13 (TC) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT) OK: Go to next step
  3. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is not output A DTC is not output (when troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> REPAIR CIRCUIT INDICATED BY OUTPUT CODE B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU
  4. CHECK HARNESS AND CONNECTOR (ECM TO DLC3) Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition A7-3 (TC) - K16-13 (TC) Below 1 ohms K16-13 (TC) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT) OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (DLC3 TO BODY GROUND) Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
  6. CHECK ECM (DLC3 TC TERMINAL INPUT) Using the SST, connect the terminals TC and CG of the DCL3. SST: 09843-18040 Check that the engine, ABS, and VSC warning lights are blinking. Result Result Proceed to Warning lights are blinking A Warning lights are not blinking B B --> REPLACE ECM A: Go to next step
  7. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is not output A DTC is not output (when troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> REPAIR CIRCUIT INDICATED BY OUTPUT CODE B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU

Note. When replacing the absorber control ECU, check the acceleration sensor assembly signal after replacement Refer to TEST MODE PROCEDURE .

HINT

Check the condition of each related circuit connector before troubleshooting Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

Scheme 42

Scheme 42: PROCEDURE
Scheme 42: PROCEDURE

Scheme 43

Scheme 43
Scheme 43
  1. INSPECT TERMINAL VOLTAGE (DLC3 TS TERMINAL) Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition K16-12 (TS) - K16-4 (CG) Engine switch on (IG) 10 to 14 V Turn the engine switch off. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> See step 4 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO DLC3) Disconnect the skid control ECU connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition A13-25 (TS) - K16-12 (TS) Below 1 ohms K16-12 (TS) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (TS TERMINAL CIRCUIT) OK: Go to next step
  3. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is not output A DTC is not output (when troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> REPAIR CIRCUIT INDICATED BY OUTPUT CODE B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU
  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO DLC3) Disconnect the skid control ECU connector. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition A13-25 (TS) - K16-12 (TS) Below 1 ohms K16-12 (TS) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (TS TERMINAL CIRCUIT) OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (DLC3 TO BODY GROUND) Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
  6. CHECK ECM (DLC3 TS INPUT) Using the SST, connect the terminals TS and CG of the DLC3. SST: 09843-18040 Check that the engine, ABS and VSC warning lights are blinking. Result Result Proceed to Warning lights are blinking A Warning lights are not blinking B B --> CHECK BRAKE CONTROL SYSTEM (TS TERMINAL CIRCUIT) A: Go to next step
  7. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . Result Result Proceed to DTC is not output A DTC is not output (when troubleshooting accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> REPAIR CIRCUIT INDICATED BY OUTPUT CODE B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE A --> REPLACE ABSORBER CONTROL ECU

More articles — Adaptive Variable Suspension System (Diagnostic Codes & Symptom Tests)