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DTC U0074:00 [TCM (SJ6A-EL)]

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2016 – MX-5 – Transmission/Transaxle

DTC U0074:00 [TCM (SJ6A-EL)]

DTC U0074:00

CAN communication: Module communication error (local CAN between TCM and PCM)

DETECTION CONDITION

  • Vehicle condition: TCM communication normal

  • Status: Detects CAN BUS OFF malfunction

  • Period: After CAN controller reset, confirmed by re-detection

FAIL-SAFE FUNCTION

  • Inhibits learning control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

POSSIBLE CAUSE

  • CAN bus communication line malfunction

  • PCM malfunction

  • TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

NOTE:

  • Recording can be facilitated using the screen capture of the PC function.

  • Record the freeze frame data/snap shot data.

Go to the next step.

2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

  • Verify related Service Bulletins and/or on-line repair information availability.

  • Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

  • If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

VERIFY OTHER RELATED DTCs

Yes

Follow the applicable DTC inspection procedure, then go to the next step.

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

No

Go to the next step.

4

VERIFY PCM DTC

Yes

DTC U0074:00 or U0302:00 is displayed:

  • CAN communication line can be considered the cause.

    • Repair or replace the wiring harness between PCM and TCM, then go to the next step.

DTC other than U0074:00 and U0302:00 is displayed:

No

PCM can be considered the cause.

5

VERIFY SAME DTC IS NOT PRESENT

Yes

Replace the TCM, then go to the next step.

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

No

Go to the next step.

6

VERIFY DTC TROUBLESHOOTING COMPLETED

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.

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