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DTC U0402:00 [DSC HU/CM]

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2016 – MX-5 – Brakes

DTC U0402:00 [DSC HU/CM]

DTC

U0402:00

Signal error from TCM

DETECTION CONDITION

  • Error detected in signal from TCM via CAN communication.

FAIL-SAFE FUNCTION

POSSIBLE CAUSE

  • TCM malfunction

SYSTEM WIRING DIAGRAM

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY TCM DTC

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

VERIFY DTC TROUBLESHOOTING COMPLETED

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

VERIFY NO DTC IS PRESENT

  • Are any DTCs present?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.

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