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 (rear acceleration sensor) through the skid control ECU (brake actuator assembly).

If a malfunction occurs in either a front speed sensor or rear speed sensor, DTC C1783 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1783 Speed Signal Communication Error 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 (rear acceleration sensor)

 Does not come on -

CAUTION / NOTICE / HINT

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.

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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.

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

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      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is 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