AIR SUSPENSION SYSTEM, Diagnostic DTC:C1781

DTC Code DTC Name
C1781 Suspension Control ECU Malfunction

DESCRIPTION

If a malfunction in the suspension control ECU is detected, DTC C1781 is stored.

DTC Code DTC Detection Condition Trouble Area
C1781

One of the following conditions is met:


  • A nonvolatile memory malfunction

  • A CAN communication resistor malfunction

  • A main relay lock-up malfunction

 Suspension control ECU

CAUTION / NOTICE / HINT

Note

When replacing the suspension control ECU, perform registration Click here.

Tech Tips

If DTC C1782 is output at the same time as C1781, perform the inspection necessary for DTC C1782 first Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Perform a road test.

    3. Check for DTC Click here.

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

    A

    REPLACE SUSPENSION CONTROL ECU Click here

    B

    USE SIMULATION METHOD TO CHECK Click here