AIR SUSPENSION SYSTEM, Diagnostic DTC:C1781/81

DTC Code DTC Name
C1781/81 Suspension Control ECU Malfunction

DESCRIPTION

If a malfunction in the suspension control ECU is detected, DTC C1781/81 is stored.

DTC Code DTC Detection Condition Trouble Area
C1781/81

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

INSPECTION PROCEDURE

Note

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

Tech Tips

If DTC C1782/82 is output at the same time as C1781/81, perform the inspection necessary for DTC C1782/82 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

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

    REPLACE SUSPENSION CONTROL ECU Click here