ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1787

DTC Code DTC Name
C1787 Forward/Rearward/Sideways G Sensor Communication Error

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1787 Forward/Rearward/Sideways G Sensor Communication Error While the engine switch is on (IG), an airbag sensor assembly (acceleration sensor)*1 or yaw rate sensor (acceleration sensor)*2 malfunction signal is detected for 1 second or more.

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

  • Airbag sensor assembly (acceleration sensor)*1

  • Yaw rate sensor (acceleration sensor)*2

 Does not come on -

*1: for Optitron Meter Type

*2: for TFT Meter Type

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.

    Click here

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


    • Symptom simulation.

      Click here

    • DTC inspection.

      Click here

    • GTS inspection.

      Click here


      • 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.

    Click here

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 yaw rate sensor malfunction DTCs.

      Click here


      Chassis > ABS/VSC/TRAC > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for TFT Meter Type) B
      DTC is output (for Optitron Meter Type) C

    A

    REPLACE ABSORBER CONTROL ECU (REAR ACCELERATION SENSOR) Click here

    B

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

    C

    GO TO AIRBAG SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here