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ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1783

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DTC Code DTC Name
C1783 Speed Signal Communication Error
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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 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
C1783 Speed Signal Communication Error A speed sensor malfunction signal from the skid control ECU assembly is detected for 1 second or more.

  • CAN communication system

  • Brake control system (speed sensor circuit)

  • Absorber control ECU

 Does not come on
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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, perform all of the following again: 1) symptom simulation ; 2) DTC inspection; and 3) GTS inspection (ECU Data List or Active TestClick 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.

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PROCEDURE


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    CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs.

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      1. Chassis > Air suspension > Trouble Codes


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

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    CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Check if DTC C1783 and a electronically controlled brake system speed sensor malfunction DTC are output.

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      1. Chassis > ABS/VSC/TRAC > Trouble Codes


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

    • A

      REPLACE ABSORBER CONTROL ECUClick here

    • B

      GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)Click here