ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1785

DTC Code DTC Name
C1785 Steering Control ECU Communication Error

DESCRIPTION

The absorber control ECU receives signals from the VGRS ECU (front steering control ECU) via CAN communication.

When there is a communication malfunction, the malfunction will be detected by the diagnosis function.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1785 Steering Control ECU Communication Error While the engine switch is on (IG), the VGRS ECU (front steering control ECU) malfunction signal is received for 5 seconds or more.

  • CAN communication system

  • VGRS system

 Does not come on w/ VGRS System

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, perform all of the following again: 1) symptom simulation ; 2) DTC inspection; 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


      Chassis > Air suspension > Trouble Codes
      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output B

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. CHECK FOR DTC (VGRS SYSTEM)


    1. Check for VGRS system malfunction DTCs.

      Click here


      Chassis > VGRS > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

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