ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1784

DTC Code DTC Name
C1784 Steering Angle Sensor Communication Error

DESCRIPTION

The steering sensor signal is sent to the absorber control ECU using the CAN communication system. When there is a communication malfunction, the malfunction will be detected by the diagnosis function.

DTC Code Detection Condition Trouble Area
C1784 A steering sensor signal malfunction is detected, or a steering sensor power malfunction signal is detected for 5 seconds or more.

  • CAN communication system

  • Brake control system (steering sensor circuit)

  • Absorber control ECU

INSPECTION PROCEDURE

Note


  • When replacing the steering sensor, confirm that the replacement part is of the correct specification.

  • 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 for steering sensor malfunction DTCs 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