DTC

U0402:00

Signal error from TCM

DETECTION CONDITION

• Error detected in signal from TCM via CAN communication.

FAIL-SAFE FUNCTION

• Refer to “Fail-safe function table”. (See DTC TABLE [DSC HU/CM].)

POSSIBLE CAUSE

• TCM malfunction

SYSTEM WIRING DIAGRAM

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Step

Inspection

Action

1

• Using the M-MDS, perform the TCM DTC inspection.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

DTC troubleshooting completed, then go to the next step.

No

Go to the next step.

2

• Using the M-MDS, clear the DTC from the DSC HU/CM.

  (See CLEARING DTC [DSC HU/CM].)

• Using the M-MDS, perform the DSC HU/CM DTC inspection.

  (See DTC INSPECTION [DSC HU/CM].)

• Is the same DTC present?

Yes

Repeat the inspection from Step1

If the malfunction recurs, replace the TCM, then go to the next step.

(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)

No

Go to the next step.

3

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [DSC HU/CM].)

No

DTC troubleshooting completed.