AIR SUSPENSION SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the air suspension system.

  • *: Use intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. PROBLEM SYMPTOM CONFIRMATION


    NEXT

  3. INSPECT AUXILIARY BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

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


    NEXT

  4. CHECK ECUS CONNECTED TO CAN BUS *


    1. Check ECUs connected to CAN bus Click here.

      Result
      Result Proceed to
      Malfunction appears A
      No malfunction appears B

      B

      Go to CAN COMMUNICATION SYSTEM
      A

  5. CHECK DTC (AIR SUSPENSION SYSTEM) *


    1. Check for DTCs Click here.

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

      B

      Go to DTC CHART
      A

  6. PROBLEM SYMPTOM TABLE

    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 8
    A

  7. OVERALL ANALYSIS AND TROUBLESHOOTING *


    1. Data List / Active Test Click here

    2. Terminals of ECU Click here


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  8. REPAIR OR REPLACE


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  9. CONFIRMATION TEST


    NEXT
    END