Adaptive Variable Suspension System (Diagnostics Codes & Circuit Tests): Diagnosis Lexus GS III рестайлинг

INSPECTION PROCEDURE

Note. When replacing the absorber control ECU, check the acceleration sensor 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-386951-S41924473032011022400000) .
2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-386965-S34256678352011022400000) .

Scheme 28

Scheme 29

Scheme 30

Scheme 31

1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the power switch ON (IG) and turn the Techstream main switch ON. Select "DATA LIST" mode on Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-386964-S13571368592011022400000) . ABSORBER CONTROL ECU: 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 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 vehicle (FL) is bounced G (Up & Down) Sensor R 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 vehicle (rear) is bounced Check that the value of the acceleration sensor reading 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-386964-S15748959292011022400000) . Perform a road test. Check if the same DTC is detected. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 --> See step 7 A --> REPLACE ABSORBER CONTROL ECU
3. INSPECT ACCELERATION SENSOR (for Front LH) Remove the front acceleration sensor. Refer to «REMOVAL»(ref-387128-S14957342442011022400000) . Connect 3 1.5 V dry cell batteries in series. Connect terminal 3 (SGB) to the batterys' positive (+) terminal, and terminal 2 (SGG) to the batterys' negative (-) terminal. Measure the voltage of the sensor. Standard voltage Tester Connection Sensor Condition Specified Condition 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. If it is dropped, replace it with a new one. The removed acceleration sensor must not be placed upside down. HINT: When the acceleration sensor is tilted, it may output a different value. NG --> REPLACE ACCELERATION SENSOR OK --> GO TO STEP 5
4. INSPECT ACCELERATION SENSOR (for Rear) Remove the rear acceleration sensor. Refer to «REMOVAL»(ref-387128-S26244110952011022400000) . Connect the 3 1.5 V dry cell batteries in series. Connect terminal 3 (SGV) to the batterys' positive (+) terminal, and terminal 2 (SGND) to the batterys' negative (-) terminal. Measure the voltage of the sensor. Standard voltage Tester Connection Sensor Condition Specified Condition 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. If it is dropped, replace it with a new one. The removed acceleration sensor must not be placed upside down. HINT: When the acceleration sensor is tilted, it may output the different value. NG --> REPLACE ACCELERATION SENSOR OK: Go to next step
5. CHECK WIRE HARNESS (ABSORBER CONTROL ECU - ACCELERATION SENSOR) for Front (C1716, C1792): Disconnect the U2 absorber control ECU connector and the K24 front acceleration sensor connector. Measure the resistance of the wire harness side connectors. Standard 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 for Rear (C1717, C1793): Disconnect the U2 absorber control ECU connector and the U26 rear acceleration sensor connector. Measure the resistance of the wire harness side connectors. Standard 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-386964-S15748959292011022400000) . Perform a road test. Check if the same DTC is detected. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 --> See next step A --> REPLACE ABSORBER CONTROL ECU
7. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)

Note. When replacing the absorber control ECU, check the acceleration sensor 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-386951-S41924473032011022400000) .
2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-386965-S34256678352011022400000) .

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

1. PERFORM ACTIVE TEST USING TECHSTREAM (ABSORBER CONTROL ACTUATOR OPERATION) Connect Techstream to the DLC3. Turn the power switch ON (IG) and turn the Techstream main switch ON. Select "ACTIVE TEST" mode on Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-386964-S13571368592011022400000) . ABSORBER CONTROL ECU Item Vehicle Condition / Test Details Diagnostic Note Damper Step FR Changes damper step / min.: 1 step, max.: 17 step Damper step changes Damper Step FL Changes damper step / min.: 1 step, max.: 17 step Damper step changes Damper Step RR Changes damper step / min.: 1 step, max.: 17 step Damper step changes Damper Step RL Changes damper step / min.: 1 step, max.: 17 step Damper step changes 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-386964-S14361576342011022400000) . 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-386964-S15748959292011022400000) . Perform a road test. Check that the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 --> See step 6 A --> REPLACE ABSORBER CONTROL ECU
3. CHECK WIRE HARNESS (ABSORBER CONTROL ACTUATOR CIRCUIT) Disconnect the A37 or U2 absorber control ECU connector and the A12, A26, V28 or U24 absorber control actuator connector. for Front LH (C1725): Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A37-5 (FAL+) - A12-2 (A+) Below 1 ohms A37-14 (FAL-) - A12-5 (A-) Below 1 ohms A37-6 (FBL+) - A12-1 (B+) Below 1 ohms A37-16 (FBL-) - A12-4 (B-) Below 1 ohms A37-5 (FAL+) - Body ground 10 kohms or higher A37-6 (FBL+) - Body ground 10 kohms or higher A37-14 (FAL-) - Body ground 10 kohms or higher A37-16 (FBL-) - Body ground 10 kohms or higher A12-3 (E) - Body ground Below 1 ohms for Front RH (C1726): Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A37-1 (FAR+) - A26-2 (A+) Below 1 ohms A37-2 (FAR-) - A26-5 (A-) Below 1 ohms A37-3 (FBR+) - A26-1 (B+) Below 1 ohms A37-4 (FBR-) - A26-4 (B-) Below 1 ohms A37-1 (FAR+) - Body ground 10 kohms or higher A37-2 (FAR-) - Body ground 10 kohms or higher A37-3 (FBR+) - Body ground 10 kohms or higher A37-4 (FBR-) - Body ground 10 kohms or higher A26-3 (E) - Body ground Below 1 ohms for Rear LH (C1727): Measure the resistance of the wire harness side connectors. Standard resistance 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 for Rear RH (C1728): Measure the resistance of the wire harness side connectors. Standard resistance 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 OK: Go to next step
4. INSPECT ABSORBER CONTROL ACTUATOR (EACH ABSORBER CONTROL ACTUATOR) Check the shaft stop position. Remove the absorber control actuator. For the front, refer to the following procedures. Refer to «REMOVAL»(ref-387128-S18380472742011022400000) . For the rear, refer to the following procedures. Refer to «REMOVAL»(ref-387128-S09478747062011022400000) . Connect the connector to the absorber control actuator. Check absorber control actuator operation. Refer to «OPERATION CHECK»(ref-386964-S14361576342011022400000) . Enter the Test Mode and turn the power switch ON (READY). Check the shaft rotation when depressing the brake pedal. OK Every time the brake pedal is depressed, the absorber control actuator rotates in the hard to soft direction in 15° intervals up to a maximum angle of 120°. Check the actuator resistance. Disconnect the absorber control actuator connector. Measure the resistance of the actuator. Standard 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-386964-S15748959292011022400000) . Perform a road test. Check that the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 in accordance with the PROBLEM SYMPTOMS TABLE) B DTC is not output C C --> END B --> See next step A --> REPLACE ABSORBER CONTROL ECU
6. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)

Note. When replacing the absorber control ECU, check the acceleration sensor 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-386951-S41924473032011022400000) .
2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-386965-S34256678352011022400000) .

Note. When replacing the absorber control ECU, check the acceleration sensor 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 37

Scheme 38

1. INSPECT BATTERY VOLTAGE Check the battery voltage. Standard voltage 10 to 14 V NG --> CHECK CHARGING SYSTEM OK: Go to next step
2. INSPECT FUSE (AIR SUS) Remove the AIR SUS fuse from the main body ECU RH. Measure the resistance of the AIR SUS fuse. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
3. CHECK WIRE HARNESS (B CIRCUIT) Disconnect the K72 absorber control ECU connector. Turn the power switch ON (IG). Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition K72-1 (B) - Body ground Power switch ON (IG) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (B CIRCUIT) OK: Go to next step
4. CHECK WIRE HARNESS (GND CIRCUIT) Disconnect the K72 absorber control ECU connector. Measure the resistance of the wire harness side connector. Standard 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-386964-S15748959292011022400000) . Turn the power switch ON (READY). Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 --> See next step A --> REPLACE ABSORBER CONTROL ECU
6. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)

Note. When replacing the absorber control ECU, check the acceleration sensor 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-386951-S41924473032011022400000) .
2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-386965-S34256678352011022400000) .

HINT

1. Check the condition of each related circuit connector before troubleshooting. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-386951-S41924473032011022400000) .
2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-386965-S34256678352011022400000) .

Scheme 39

1. CHECK FOR DTC Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . Turn the power switch OFF. Turn the power switch ON (IG) again and check that no CAN communication system DTC is output. Turn the power switch ON (READY). Drive the vehicle and turn the steering wheel to the right and left at a speed of 24 mph (35 km/h), and check which DTC is output. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) and. Refer to «DTC CHECK / CLEAR»(ref-386974-S03953297302011022400000) ). 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 --> See step 5 B --> See step 3 A: Go to next step
2. CHECK WIRE HARNESS (STEERING ANGLE SENSOR INPUT VOLTAGE) Disconnect the K19 steering angle sensor connector. Turn the power switch ON (IG). Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition K19-1 (IG) - K19-2 (ESS) Power switch ON (IG) 10 to 14 V Turn the power switch OFF. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition K19-2 (ESS) - Body ground Below 1 ohms RESULT Result Proceed to OK A OK (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE) B NG C C --> REPAIR OR REPLACE HARNESS OR CONNECTOR B --> See step 4 A --> REPLACE STEERING ANGLE SENSOR
3. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-387091-S16670403232011022400000)
4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)
5. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-386974-S06384688152011022400000)

Note. When replacing the absorber control ECU, check the acceleration sensor 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-386951-S41924473032011022400000) .
2. When C1774 is output, inspect and repair the trouble areas indicated by C1774 first. Refer to «DTC C1774: Low Battery Positive Voltage»(ref-386965-S34256678352011022400000) .

Scheme 40

Scheme 41

1. READ VALUE USING TECHSTREAM (ABSORBER CONTROL SWITCH) Connect Techstream to the DLC3. Turn the power switch ON (IG) and turn the Techstream main switch ON. Select "DATA LIST" mode on Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-386964-S13571368592011022400000) . ABSORBER CONTROL ECU Item Measurement Item/ Range (Display) Normal Condition Diagnostic Note Damper Force Switch 1 Damping 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-386964-S15748959292011022400000) . Perform the Test Mode. Refer to «TEST MODE PROCEDURE»(ref-386964-S34760142652011022400000) . Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 --> See step 6 A --> REPLACE ABSORBER CONTROL ECU
3. INSPECT ABSORBER CONTROL SWITCH Remove the absorber control switch. Refer to «REMOVAL»(ref-387128-S27280407572011022400000) . Measure the resistance of the switch. Standard resistance Tester Connection Switch Position Specified Condition Switch terminal 4 - Switch terminal 3 NORM 10 kohms or higher Switch terminal 4 - Switch terminal 3 SPORT Below 1 ohms NG --> REPLACE ABSORBER CONTROL SWITCH OK: Go to next step
4. CHECK WIRE HARNESS (SWITCH - ECU AND BODY GROUND) Disconnect the K72 absorber control ECU connector. Disconnect the K41 absorber control switch connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K72-9 (SW1) - K41-4 Below 1 ohms K72-9 (SW1) - Body ground 10 kohms or higher 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-386964-S15748959292011022400000) . Perform Test Mode. Refer to «TEST MODE PROCEDURE»(ref-386964-S34760142652011022400000) . Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . 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 --> See next step A --> REPLACE ABSORBER CONTROL ECU
6. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)

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

HINT

1. Start the inspection from "CHECK FOR DTC (CAN COMMUNICATION SYSTEM)" when troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.

1. Check the condition of each related circuit connector before troubleshooting. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-386951-S41924473032011022400000) .

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

HINT

1. Start the inspection from "CHECK FOR DTC (CAN COMMUNICATION SYSTEM)" when troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.

1. Check the condition of each related circuit connector before troubleshooting. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-386951-S41924473032011022400000) .

Note. When replacing the absorber control ECU, check the acceleration sensor signal after replacement. Refer to TEST MODE PROCEDURE . If the hybrid control ECU has been replaced, it is necessary to register the ECU. Refer to REGISTRATION .

HINT

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

Scheme 42

Scheme 43

Scheme 44

1. CHECK DLC3 (TC VOLTAGE) Turn the power switch ON (IG). Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition K16-13 (TC) - K16-4 (CG) Power switch ON (IG) 10 to 14 V Turn the power switch OFF. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> See step 4 OK: Go to next step
2. CHECK WIRE HARNESS (DLC3 - HYBRID CONTROL ECU) Disconnect the A54 hybrid control ECU connector. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition A54-63 (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 FOR DTC (CAN COMMUNICATION SYSTEM) Check if the CAN communication system DTC is output. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . Result Result Proceed to DTC is not output A DTC is not output (when troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> See step 8 B --> See step 9 A --> REPLACE ABSORBER CONTROL ECU
4. CHECK WIRE HARNESS (DLC3 - HYBRID CONTROL ECU) Disconnect the A54 hybrid control ECU connector. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition A54-63 (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 WIRE HARNESS (DLC3 - BODY GROUND) Measure the resistance of the wire harness side connector. Standard 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 DLC3 (TC TERMINAL INPUT) Using SST, connect the terminals 13 (TC) and 4 (CG) of the DCL3. SST: 09843-18040 Check that the engine and ABS warning lights are blinking. Result Result Proceed to Warning lights are blinking A Warning lights are not blinking B B --> REPLACE HYBRID CONTROL ECU A: Go to next step
7. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check if the CAN communication system DTC is output. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . Result Result Proceed to DTC is not output A DTC is not output (when troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> See next step B --> See step 9 A --> REPLACE ABSORBER CONTROL ECU
8. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-387091-S16670403232011022400000)
9. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)

Note. When replacing the absorber control ECU, check the acceleration sensor 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 45

Scheme 46

1. INSPECT DLC3 TERMINAL VOLTAGE (TS TERMINAL) Turn the power switch ON (IG). Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition K16-12 (TS) - K16-4 (CG) Power switch ON (IG) 10 to 14 V Turn the power switch OFF. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> See step 3 OK: Go to next step
2. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . RESULT Result Proceed to DTC is not output A DTC is not output (when troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> See step 7 B --> See step 9 A --> REPLACE ABSORBER CONTROL ECU
3. CHECK WIRE HARNESS (SKID CONTROL ECU - DLC3) Disconnect the A13 skid control ECU connector. Measure the resistance of the wire harness side connector. Standard 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 OK: Go to next step
4. CHECK WIRE HARNESS (DLC3 - BODY GROUND) Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition K16-4 (CG) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK WARNING LIGHT (DLC3 TS INPUT) Using SST, connect the terminals 12 (TS) and 4 (CG) of the DLC3. SST: 09843-18040 Check that the engine and ABS warning lights are blinking. RESULT Result Proceed to Warning lights are blinking A Warning lights are not blinking B B --> See step 8 A: Go to next step
6. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output. Refer to «DTC CHECK / CLEAR»(ref-386964-S15748959292011022400000) . RESULT Result Proceed to DTC is not output A DTC is not output (when troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE) B DTC is output C C --> See next step B --> See step 9 A --> REPLACE ABSORBER CONTROL ECU
7. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-387091-S16670403232011022400000)
8. CHECK BRAKE CONTROL SYSTEM (TS TERMINAL CIRCUIT). Refer to «TS and CG Terminal Circuit»(ref-386952-S39582239602011022400000)
9. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-386964-S11539330432011022400000)