ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1781

DTC Code DTC Name
C1781 Suspension Control ECU Malfunction

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 Memory
C1781 Suspension Control ECU Malfunction

One of the following 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 Yes

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.

  • After replacing the absorber control ECU with a new one, perform registration of vehicle identification information.

    Click here

PROCEDURE


  1. CHECK FOR DTCS (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs.

      Click here


      Chassis > Adaptive Variable Suspension System > Trouble Codes
      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output B

    A

    REPLACE ABSORBER CONTROL ECU Click here

    B

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