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

Electronic Suspension 1 illustration ~1706 words

INSPECTION PROCEDURE

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. Before performing troubleshooting, inspect the connectors of related circuits. Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] . Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 11

Scheme 11: PROCEDURE
Scheme 11: PROCEDURE
  1. READ VALUE USING TECHSTREAM (IG POWER SOURCE VOLTAGE) 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 IG Power Source Voltage ECU power supply voltage/ Min.: 0.0 V Max.: 25.5 V 11 to 14 V (Actual ECU power supply voltage): power switch on (IG) - OK The normal condition value is displayed on the Techstream. NG --> See step 3 OK: Go to next step
  2. CHECK FOR 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 not output A DTC is output B B --> See step 7 A --> See step 6
  3. INSPECT BATTERY Check the battery voltage. Standard voltage 11 to 14 V NG --> See step 8 OK: Go to next step
  4. CHECK TERMINAL VOLTAGE (B) Disconnect the absorber control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition N105-3 (B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Absorber Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (GND TERMINAL) Disconnect the absorber control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N105-5 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Absorber Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
  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. CHECK OR REPLACE CHARGING SYSTEM OR BATTERY. Refer to «ON-VEHICLE INSPECTION [03/2012 - ]»(ref-600604-S34252788122014022400000)

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. When replacing the steering sensor, confirm that the replacement part is of the correct specification. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1781 (Suspension Control ECU Malfunction) is output at the same time, perform troubleshooting for C1781 first. Refer to DTC C1781: Suspension Control ECU Malfunction . If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

Note. Before performing troubleshooting, inspect the connectors of related circuits. If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first. Refer to DTC C1782: Power Source Voltage Malfunction . Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] ; 2) DTC inspection. Refer to DTC CHECK / CLEAR [03/2012 - ] ; and 3) Techstream inspection (ECU Data List or Active Test. Refer to DATA LIST / ACTIVE TEST [03/2012 - ] ). If no malfunctions are found in other areas, replace the absorber control ECU. When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met. Refer to TEST MODE PROCEDURE [03/2012 - ] .

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