ACTIVE HEIGHT CONTROL SUSPENSION, Diagnostic DTC:C1783

DTC Code DTC Name
C1783 Speed Signal Communication Error

DESCRIPTION

The speed sensors monitor the speed of the wheels, and send appropriate speed signals to the suspension control ECU through the skid control ECU (master cylinder solenoid). If trouble occurs in either the front speed sensor or rear speed sensor, DTC (C1783) is output.

DTC Code Detection Condition Trouble Area
C1783 A speed sensor circuit malfunction for 1 second or more.

  • Vehicle stability control system

  • Suspension control ECU

CAUTION / NOTICE / HINT

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 FOR DTC (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check if a speed sensor malfunction DTC is output under the vehicle stability control system Click here.

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

    B

    GO TO VEHICLE STABILITY CONTROL 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 C1783 is output A
      DTC C1783 is not output B

    A

    REPLACE SUSPENSION CONTROL ECU Click here

    B

    USE SIMULATION METHOD TO CHECK Click here