LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Adaptive Variable Suspension System - Diagnostics - Introduction >> Adaptive Variable Suspension System >> How To Proceed With Troubleshooting [10/2023 - ] >> Procedure

How To Proceed With Troubleshooting [10/2023 - ]: Procedure

  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. CUSTOMER PROBLEM ANALYSIS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. INSPECT BATTERY VOLTAGE 
    1. Measure the voltage of the battery.

      Standard voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK ECUS CONNECTED TO CAN BUS 
    1. Check the ECUs connected to the CAN bus.

      Refer to DIAGNOSIS SYSTEM [10/2023 - ]

      Result

      Result Proceed to
      No malfunction appears A
      Malfunction appears B

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    A 

    See step  5

  5. CHECK DTC, FREEZE FRAME DATA AND VEHICLE CONTROL HISTORY (RoB) 
    1. Check DTCs and freeze frame data.

      Chassis > Adaptive Variable Suspension System > Trouble Codes 

      1. Check and record DTCs.
      2. Check and record freeze frame data.
    2. Clear the DTCs and freeze frame data.

      Chassis > Adaptive Variable Suspension System > Clear DTCs 

    3. Recheck for DTCs.

      Chassis > Adaptive Variable Suspension System > Trouble Codes 

      1. Reproduce the problem symptoms based on the recorded DTCs and freeze frame data, and then check if the DTCs are output again.

        HINT: 

        • When DTCs indicating a CAN communication system malfunction are output, first troubleshoot and repair the CAN communication system.
        • If the GTS cannot communicate with the absorber control ECU, check CAN communication between the DLC3 and the absorber control ECU, and also check the IG circuit of the absorber control ECU.
    4. Check the vehicle control history (RoB).

      Refer to VEHICLE CONTROL HISTORY (RoB) [10/2023 - ]

      Chassis > Adaptive Variable Suspension System > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      DTC is not output and problem symptoms cannot be reproduced and confirmed A
      DTC is output B
      DTC is not output and vehicle control history (RoB) is output C

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    C 

    PERFORM TROUBLESHOOTING AND REPAIRS RELATED TO VEHICLE CONTROL HISTORY (RoB) 

    Refer to VEHICLE CONTROL HISTORY (RoB) [10/2023 - ]

    NOTE:

    After performing troubleshooting and repairs related to the vehicle control history (RoB), clear the vehicle control history (RoB).

    Result: 

    B 

    See step  6

  6. REFER TO DIAGNOSTIC TROUBLE CODE CHART, PERFORM TROUBLESHOOTING ACCORDING TO PROCEDURE FOR EACH DTC 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  7

  7. REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  8

  8. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END