ACTIVE HEIGHT CONTROL SUSPENSION, Diagnostic DTC:C1785

DTC Code DTC Name
C1785 Steering Control ECU Communication Error

DESCRIPTION

The suspension control ECU receives signals from the steering control ECU via CAN communication.

DTC Code Detection Condition Trouble Area
C1785 While the engine switch is on (IG), the steering control ECU malfunction signal is received for 5 seconds.

  • Variable gear ratio steering system (VGRS system)

  • Suspension control ECU

INSPECTION PROCEDURE

Note


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

  • If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed Click here.

PROCEDURE


  1. CHECK DTC (VARIABLE GEAR RATIO STEERING SYSTEM)


    1. Check if a DTC is output from the variable gear ratio steering system Click here.

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

    B

    GO TO VARIABLE GEAR RATIO STEERING SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  2. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  3. CHECK DTC


    1. Check for DTCs.

      Result
      Result Proceed to
      DTC C1785 is output A
      DTC C1785 is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

    REPLACE SUSPENSION CONTROL ECU Click here