ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1783

DTC Code DTC Name
C1783 Speed Signal Communication Error

DESCRIPTION

The speed sensors monitor the speed of the wheels and send an appropriate speed signal to the absorber control ECU through the skid control ECU (brake actuator assembly). If trouble occurs in either a front speed sensor or rear speed sensor, DTC C1783 is stored.

DTC Code Detection Condition Trouble Area
C1783 A speed sensor malfunction signal from the skid control ECU (brake actuator assembly) is detected for 1 second or more.

  • CAN communication system

  • Brake control system (speed sensor circuit)

  • Absorber control ECU

INSPECTION PROCEDURE

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 again: 1) symptom simulation Click here; 2) DTC inspection Click here; and 3) GTS inspection (ECU Data List or Active Test 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.

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (for LHD) B
      CAN DTC is output (for RHD) C

    B

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

    C

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

    A

  2. CHECK FOR DTC (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check if DTC C1783 and a vehicle stability control system speed sensor malfunction DTC are output 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

    REPLACE ABSORBER CONTROL ECU Click here