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Adaptive Variable Suspension System (Diagnostic Codes): Other Lexus GS IV

Electronic Suspension ~2393 words

PROCEDURE

  1. READ VALUE USING TECHSTREAM ((UP & DOWN) G SENSOR) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / Air suspension / Data List. AIR SUSPENSION Tester Display Measurement Item/Range Normal Condition Diagnostic Note (Up&Down)G Sensor FR Front acceleration sensor RH (up and down)/ Min.: -1045.29 m/s 2 Max.: 1045.26 m/s 2 -0.98 to 0.98 m/s 2 when stationary The value changes when the vehicle (front RH) is bounced. (Up&Down)G Sensor FL Front acceleration sensor LH (up and down)/ Min.: -1045.29 m/s 2 Max.: 1045.26 m/s 2 -0.98 to 0.98 m/s 2 when stationary The value changes when the vehicle (front LH) is bounced. (Up&Down)G Sensor Rear Rear acceleration sensor (up and down)/ Min.: -1045.29 m/s 2 Max.: 1045.26 m/s 2 -0.98 to 0.98 m/s 2 when stationary The value changes when the vehicle (rear) is bounced. OK Acceleration value changes. RESULT Result Proceed to OK A NG (front RH) B NG (front LH or rear) C B --> See step 5 C --> See step 3 A: Go to next step
  2. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . Turn the power switch off. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to DTC is output (front LH or rear) A DTC is output (front RH) B DTC is not output C B --> See step 5 C --> See step 7 A: Go to next step
  3. INSPECT ACCELERATION SENSOR (FRONT LH OR REAR) Turn the power switch off. Remove the front acceleration sensor LH. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S25314678922014022400000) or rear acceleration sensor. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S22700506882014022400000) . NOTE: Do not drop the acceleration sensor. If it is dropped, replace it with a new one. Inspect the front acceleration sensor LH. Refer to «INSPECTION [03/2012 - ]»(ref-600637-S01958725242014022400000) or rear acceleration sensor. Refer to «INSPECTION [03/2012 - ]»(ref-600637-S16718184692014022400000) . RESULT Result Proceed to OK A Front acceleration sensor LH malfunction B Rear acceleration sensor malfunction C B --> See step 6 C --> See step 8 A: Go to next step
  4. CHECK HARNESS AND CONNECTOR (ACCELERATION SENSOR - ABSORBER CONTROL ECU) Check the front acceleration sensor LH harness and connector (when DTC C1716 or C1797 is output). Disconnect the A37 absorber control ECU connector. Disconnect the A8 acceleration sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A8-1 (SGFL) - A37-18 (SGFL) Always Below 1 ohms A8-2 (SGG) - A37-10 (SGL3) Always Below 1 ohms A8-3 (SGB) - A37-9 (SBL3) Always Below 1 ohms A8-1 (SGFL) - Body ground Always 10 kohms or higher A8-2 (SGG) - Body ground Always 10 kohms or higher A8-3 (SGB) - Body ground Always 10 kohms or higher Check the rear acceleration sensor harness and connector (when DTC C1717 or C1798 is output). Disconnect the N105 absorber control ECU connector. Disconnect the T31 acceleration sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition T31-1 (SGRR) - N105-26 (SGRR) Always Below 1 ohms T31-2 (SGND) - N105-16 (SGR3) Always Below 1 ohms T31-3 (SGV) - N105-17 (SBR3) Always Below 1 ohms T31-1 (SGRR) - Body ground Always 10 kohms or higher T31-2 (SGND) - Body ground Always 10 kohms or higher T31-3 (SGV) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  5. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  6. REPLACE FRONT ACCELERATION SENSOR LH. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S25314678922014022400000)
  7. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  8. REPLACE REAR ACCELERATION SENSOR. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S22700506882014022400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . NEXT: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (DAMPER STEP) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / Air suspension /Active Test. AIR SUSPENSION Tester Display Test Part Control Range Diagnostic Note Damper Step FR Changes damper step (front RH) 1 to 17 step The shock absorber hardens as the damper step increases. Damper Step FL Changes damper step (front LH) 1 to 17 step The shock absorber hardens as the damper step increases. Damper Step RR Changes damper step (rear RH) 1 to 17 step The shock absorber hardens as the damper step increases. Damper Step RL Changes damper step (rear LH) 1 to 17 step The shock absorber hardens as the damper step increases. Check if the absorber control actuator operates to harden the suspension with the Techstream. OK The absorber control actuator operates. NG --> See step 4 OK: Go to next step
  3. RECONFIRM DTC Check that the same DTC is output. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to DTC is output A DTC is not output B B --> See step 8 A: Go to next step
  4. INSPECT ABSORBER CONTROL ACTUATOR OF WHEEL TO BE INSPECTED Turn the power switch off. Remove the absorber control actuator for the front side. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S34489023802014022400000) or rear side. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S22073111142014022400000) . Inspect the absorber control actuator for the front side. Refer to «INSPECTION [03/2012 - ]»(ref-600637-S05531848092014022400000) or rear side. Refer to «INSPECTION [03/2012 - ]»(ref-600637-S13189757732014022400000) . RESULT Result Proceed to OK A Front absorber control actuator RH malfunction B Front absorber control actuator LH malfunction C Rear absorber control actuator RH malfunction D Rear absorber control actuator LH malfunction E B --> See step 7 C --> See step 9 D --> See step 10 E --> See step 11 A: Go to next step
  5. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL ACTUATOR - ABSORBER CONTROL ECU) Check the front absorber control actuator harness and connector. Connect the A42 and/or A17 front absorber control actuator connector. Disconnect the absorber control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance FOR FRONT RH (FOR DTC C1731) Tester Connection Condition Specified Condition A37-1 (FBR+) - Body ground Always 12.0 to 12.8 ohms A37-2 (FBR-) - Body ground Always 12.0 to 12.8 ohms A37-7 (FAR+) - Body ground Always 12.0 to 12.8 ohms A37-8 (FAR-) - Body ground Always 12.0 to 12.8 ohms FOR FRONT LH (FOR DTC C1732) Tester Connection Condition Specified Condition A37-3 (FAL+) - Body ground Always 12.0 to 12.8 ohms A37-5 (FAL-) - Body ground Always 12.0 to 12.8 ohms A37-6 (FBL+) - Body ground Always 12.0 to 12.8 ohms A37-4 (FBL-) - Body ground Always 12.0 to 12.8 ohms TEXT IN ILLUSTRATION *A for Front RH *B for Front LH *a Front view of wire harness connector (to Absorber Control ECU) Check the rear absorber control actuator harness and connector. Connect the T29 and/or U31 rear absorber control actuator connector. Disconnect the absorber control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance FOR REAR RH (FOR DTC C1733) Tester Connection Condition Specified Condition T1-2 (RAR-) - Body ground Always 12.0 to 12.8 ohms T1-3 (RBR+) - Body ground Always 12.0 to 12.8 ohms T1-4 (RBR-) - Body ground Always 12.0 to 12.8 ohms T1-1 (RAR+) - Body ground Always 12.0 to 12.8 ohms FOR REAR LH (FOR DTC C1734) Tester Connection Condition Specified Condition T1-5 (RAL+) - Body ground Always 12.0 to 12.8 ohms T1-6 (RAL-) - Body ground Always 12.0 to 12.8 ohms T1-7 (RBL+) - Body ground Always 12.0 to 12.8 ohms T1-8 (RBL-) - Body ground Always 12.0 to 12.8 ohms TEXT IN ILLUSTRATION *A for Rear RH *B for Rear LH *a Front view of wire harness connector (to Absorber Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  6. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  7. REPLACE FRONT ABSORBER CONTROL ACTUATOR RH. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S34489023802014022400000)
  8. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  9. REPLACE FRONT ABSORBER CONTROL ACTUATOR LH. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S34489023802014022400000)
  10. REPLACE REAR ABSORBER CONTROL ACTUATOR RH. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S22073111142014022400000)
  11. REPLACE REAR ABSORBER CONTROL ACTUATOR LH. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S22073111142014022400000)
  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 2 A --> See step 3
  2. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  3. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 3 A: Go to next step
  2. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check if DTC C1783 and an electronically controlled brake system speed sensor malfunction DTC are output. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600441-S41685570292014022400000) . RESULT Result Proceed to DTC is not output A DTC is output B B --> See step 4 A --> See step 5
  3. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART [03/2012 - ]»(ref-600441-S14604054422014022400000)
  5. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 3 A: Go to next step
  2. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check for steering sensor malfunction DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600441-S41685570292014022400000) . RESULT Result Proceed to DTC is not output A DTC is output B B --> See step 4 A --> See step 5
  3. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART [03/2012 - ]»(ref-600441-S14604054422014022400000)
  5. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 5 A: Go to next step
  2. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check for yaw rate sensor malfunction DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600441-S41685570292014022400000) . RESULT Result Proceed to DTC is not output A DTC is output B B --> See step 3 A --> See step 4
  3. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART [03/2012 - ]»(ref-600441-S14604054422014022400000)
  4. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  5. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 5 A: Go to next step
  2. CHECK VEHICLE IDENTIFICATION INFORMATION STATUS Check that vehicle identification information has been stored. Refer to «TEST MODE PROCEDURE [03/2012 - ]»(ref-600439-S13383850182014022400000) . RESULT Result Proceed to Information stored A Information not stored B B --> See step 8 A: Go to next step
  3. CHECK RELATED PART If the DTC was output as a result of the replacement of a related part, replace the part with one that has a correct part number. Related Part Power management control ECU Steering sensor NOTE: When removing a related part to check it, be sure to follow the appropriate procedures and precautions. Refer to the following procedures to remove the power management control ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000) . Refer to the following procedures to remove the steering sensor. Refer to «REMOVAL [03/2012 - ]»(ref-600606-S27257986782014022400000) . HINT: If parts have not been replaced and DTC C1789 is output, there may be an internal malfunction in the absorber control ECU. Therefore, replace the absorber control ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000) . NEXT: Go to next step
  4. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . Turn the power switch off. Check if DTC C1789 is output. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . OK DTC C1789 is not output. NG --> See step 7 OK --> See step 6
  5. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  7. REPLACE ABSORBER CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600637-S30781892722014022400000)
  8. PERFORM VEHICLE IDENTIFICATION INFORMATION REGISTRATION. Refer to «TEST MODE PROCEDURE [03/2012 - ]»(ref-600439-S13383850182014022400000)
  1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . Turn the power switch off. Drive the vehicle at a speed of 30 km/h (19 mph) or more for 10 seconds or more. Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600439-S15340138032014022400000) . RESULT Result Proceed to DTC is not output A DTC is output B HINT: If a CAN communication malfunction DTC and a related sensor malfunction DTC are output at the same time, the CAN communication malfunction must be repaired before troubleshooting the sensor malfunction DTC. B --> See step 2 A --> See step 3
  2. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  3. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)

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