Click here

ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1781

Click here
Click here
DTC Code DTC Name
C1781 Suspension Control ECU Malfunction
Click here

DESCRIPTION

If a malfunction in the absorber control ECU is detected, DTC C1781 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
C1781 Suspension Control ECU Malfunction

Any conditions is met:


  • A nonvolatile memory write or read error occurs.

  • A CAN communication register is stuck.

  • An overheat protection function malfunction occurs.

  • Absorber control ECU

  • CAN communication system

 Does not come on
Click here

CAUTION / NOTICE / HINT

Note:

  • Before performing troubleshooting, inspect the connectors of related circuits.

  • If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first.

    Click here

  • Before replacing the absorber control ECU, perform all of the following:


    • Symptom simulation.

      Click here

    • DTC inspection.

      Click here

    • GTS inspection.

      Click here


      • If no malfunctions are found in other areas, replace the absorber control ECU.

  • When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met.

    Click here

Click here

PROCEDURE


  1. Click here

    CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs.

      Click here


      1. Chassis > Air suspension > Trouble Codes


      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output B

    • A

      REPLACE ABSORBER CONTROL ECUClick here

    • B

      GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here