AIR SUSPENSION SYSTEM TEST MODE PROCEDURE


  1. SIGNAL CHECK

    Tech Tips


    • When entering test mode, the suspension control ECU first stores all the test mode DTCs. After completing test mode for each check item, the test mode DTCs that are determined to be normal by the suspension control ECU are cleared. The test mode DTCs for other check items may not be cleared when only a certain signal is inspected.

    • When the system returns to normal mode, all the test mode DTCs are cleared.


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Air suspension / Utility / Signal Check.

    6. Check the display of the multi-information display and confirm that the system is in test mode.

    7. Check each item in the table below by performing the corresponding operation.

      Test Mode (Input Signal Check) Table
      Check Item Operation
      Absorber control switch signal Slowly move absorber control switch from COMF to SPORT and then COMF
      Height control switch signal First press "up" on height control switch and then press "down"
      Height control OFF switch signal Turn height control OFF switch from on to off

    8. Read the test mode DTCs by following the prompts on the GTS screen.

    9. Check the malfunction using the Test Mode DTC Chart below. After completing test mode, disconnect the GTS and turn the ignition switch off.

  2. TEST MODE DTC CHART

    Tech Tips

    When entering test mode, the suspension control ECU stores all the test mode DTCs. If the clear conditions for a test mode DTC are met, it is cleared.


    1. If a trouble code is output during the test mode DTC check, check the trouble areas listed for that code. For details of each code, refer to "See page" for the respective "DTC Code" in the chart.

      DTC Code Diagnosis Trouble Area See page
      C1791* Absorber Control Switch Circuit

      • Absorber control switch

      • Absorber control switch circuit

      • Suspension control ECU

      Click here

      C1792 Height Control Switch Circuit

      • Height control switch

      • Height control switch circuit

      • Suspension control ECU

      Click here

      C1794 Height Control Off Switch Circuit

      • Height control mode select switch

      • Height control mode select switch circuit

      • Suspension control ECU

      Click here

      C1796 Front Acceleration Sensor RH Malfunction

      • Front acceleration sensor RH

      • Front acceleration sensor RH circuit

      • Suspension control ECU

      Click here

      C1797 Front Acceleration Sensor LH Malfunction

      • Front acceleration sensor LH (Suspension control ECU)

      Click here

      C1798 Rear Acceleration Sensor Malfunction

      • Rear acceleration sensor

      • Rear acceleration sensor circuit

      • Suspension control ECU

      Click here


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