AIR SUSPENSION SYSTEM TEST MODE PROCEDURE


  1. TEST MODE PROCEDURE

    Tech Tips


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

    • When the test mode returns back to the normal mode, all the test mode DTCs will be cleared.


    1. Turn the power switch OFF.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch ON (IG) and turn the tester ON.

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

    5. Confirm that the system is in test mode by checking that the "SPORT S+" indicator in the combination meter blinks at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).

      Tech Tips

      If the suspension control ECU does not store the vehicle identification information, the light blinks at 1 second intervals (1 second on and 1 second off). If the vehicle identification information is not stored, perform registration of the vehicle identification information Click here.

    6. Read the test mode DTCs by following the prompts on the tester screen.

    7. After completing the test mode, disconnect the tester and turn the power 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 deletion conditions for a test mode DTC are met, it is cleared.


    1. If a trouble code is displayed during the test mode DTC check, check the circuit listed for that code. For details of each code, refer to "See page" for the respective "DTC No." in the chart.

      DTC No. Detection Item Trouble Area Deletion Condition See page
      C1796 Suspension control ECU (houses acceleration sensor) circuit malfunction Suspension control ECU (houses acceleration sensor)

      On a level surface, G sensor input is +/-1.96 m/s2or less

      Click here

      C1797 Acceleration sensor (for Front) circuit malfunction

      • Acceleration sensor (for Front)

      • Acceleration sensor (for Front) circuit

      • Suspension control ECU
      C1798 Acceleration sensor (for Rear) circuit malfunction

      • Acceleration sensor (for Rear)

      • Acceleration sensor (for Rear) circuit

      • Suspension control ECU