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2008 - MX-5 - Transmission/Transaxle

DTC P0882 [SJ6A-EL]



DTC P0882

TCM B+ low (less than 9 V)

DETECTION CONDITION

  • Voltage of less than 9 V detected at TCM terminal 1AD when engine is running.

    Diagnostic support note:
  • The MIL does not illuminate if the TCM detects the above malfunction condition during the first drive cycle.

  • A PENDING CODE is not available.

  • FREEZE FRAME DATA is available.

  • The AT warning light not illuminates.

  • The DTC is stored in the TCM memory.

POSSIBLE CAUSE

  • Melted ROOM 15 A fuse

  • Open circuit in wiring harness between ROOM 15 A fuse and TCM terminal 1AD

  • Short to ground in wiring harness between ROOM 15 A fuse and TCM terminal 1AD

  • Poor connection of TCM connector

  • Alternator malfunction

  • TCM malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
  • Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, then 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

INSPECT FUSE
  • Turn the ignition switch to the LOCK position.

  • Inspect ROOM 15 A fuse for malfunction.

  • Is it normal?

Yes

Go to the next step.

No

  • If fuse has been melted, go to the next step.

  • If fuse is not installed correctly, install it correctly, then go to Step 8.

4

INSPECT VOLTAGE OF POWER SUPPLY CIRCUIT
  • Inspect for voltage TCM terminal 1AD (wiring harness-side).

  • Is the voltage B+?

Yes

Go to the next step.

No

Go to Step 6.

5

INSPECT TCM CONNECTOR FOR POOR CONNECTION
  • Turn the ignition switch to the LOCK position.

  • Disconnect the TCM connector.

  • Inspect for poor connection at TCM terminals 1AD (such as damaged/pulled-out pins, corrosion).

  • Is terminal normal?

Yes

Go to Step 8.

No

Repair or replace the connector and/or terminal, then go to Step 8.

6

INSPECT POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
  • Disconnect the positive battery cable.

  • Inspect for continuity between the fuse terminals and body ground.

    • ROOM 15 A fuse terminal and body ground

  • Is there continuity?

Yes

Repair or replace the wiring harness and install new fuse, then go to Step 8.

No

Go to the next step.

7

INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
  • Inspect for continuity between TCM terminal and fuse terminals (wiring harness-side).

    • Terminal 1AD and ROOM IG 15 A fuse

  • Is there continuity?

Yes

Go to the next step.

No

Repair or replace the harness, then go to the next step.

8

VERIFY TROUBLESHOOTING OF DTC P0882 COMPLETED
  • Make sure to reconnect all the disconnected connectors.

  • Clear the DTC from the memory using the M-MDS.

  • Start the engine and warm it up completely.

  • Is same DTC present?

Yes

Replace the TCM, then go to the next step.

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

No

Go to the next step.

9

VERIFY AFTER REPAIR PROCEDURE
  • Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SJ6A-EL].)

No

Troubleshooting completed.




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