ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1784

DTC Code DTC Name
C1784 Steering Angle Sensor Communication Error

DESCRIPTION

Steering angle sensor signals are sent to the absorber control ECU (rear acceleration sensor) via CAN communication.

If a communication error is detected, DTC C1784 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1784 Steering Angle Sensor Communication Error A steering angle sensor communication error is detected, or a steering angle sensor power malfunction is detected for 5 seconds or more.

  • CAN communication system

  • Brake control system (steering angle sensor circuit)

  • Absorber control ECU (rear acceleration sensor)

 Does not come on -

CAUTION / NOTICE / HINT

Note


  • When replacing the steering angle 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.

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  • Before replacing the absorber control ECU (rear acceleration sensor), perform all of the following:


    • Symptom simulation.

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    • DTC inspection.

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    • GTS inspection.

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      • If no malfunctions are found in other areas, replace the absorber control ECU (rear acceleration sensor).

  • When the absorber control ECU (rear acceleration sensor) is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met.

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PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs.

      Click here


      Chassis > Air suspension > Trouble Codes
      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output B

    B

    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 angle sensor malfunction DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    A

    REPLACE ABSORBER CONTROL ECU (REAR ACCELERATION SENSOR) Click here

    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here