AIR SUSPENSION SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips

Use these procedures to troubleshoot the air suspension system.

*: Use the intelligent tester.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    NEXT

  2. PROBLEM SYMPTOM CONFIRMATION

    Result
    Proceed to
    NEXT

    NEXT

  3. INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

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

    Result
    Proceed to
    NEXT

    NEXT

  4. CHECK FOR DTC (ELECTRICAL POWER CONTROL SYSTEM)*


    1. Using the intelligent tester, check if the electric power control system is functioning normally.

      Click here

      Result
      Result Proceed to
      DTC B22B3 is not output A
      DTC B22B3 is output B

    2. Using the intelligent tester, check the electric power control system's load control history.

      Click here


    B

    GO TO ELECTRIC POWER CONTROL SYSTEM

    A

  5. CHECK ECUS CONNECTED TO CAN BUS*


    1. Check ECUs connected to CAN bus, for LHD (Click here ) or for RHD Click here.

      Result
      Result Proceed to
      Malfunction appears A
      No malfunction appears B

    B

    GO TO CAN COMMUNICATION SYSTEM

    A

  6. CHECK DTC (CAN AND LIN COMMUNICATION SYSTEM)*


    1. Check for DTCs all.

      Result
      Result Proceed to
      DTC is not output A
      CAN system DTC is output B
      LIN system DTC is output C
      DTC is output D

    B

    GO TO CAN COMMUNICATION SYSTEM

    C

    GO TO LIN COMMUNICATION SYSTEM

    D

    GO TO DTC CHART

    A

  7. PROBLEM SYMPTOM CONFIRMATION

    Result
    Result Proceed to
    Fault is not listed in problem symptoms table A
    Fault is listed in problem symptoms table B

    B

    GO TO STEP 10 Click here

    A

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List / Active Test

      Click here

    2. Terminals of ECU

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT

  10. CONFIRMATION TEST

    Result
    Proceed to
    NEXT

    NEXT

    END