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2008 - MX-5 - Engine

DTC P2089 [LF]



DTC P2089

Oil control valve (OCV) circuit high

DETECTION CONDITION

  • The PCM monitors the OCV voltage. If the PCM detects that the OCV control voltage (calculated from the OCV) is above the threshold voltage (calculated from battery positive voltage), the PCM determines that the OCV circuit has a malfunction.

    Diagnostic support note
  • This is a continuous monitor (CCM).

  • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.

  • PENDING CODE is available if the PCM detects the above malfunction condition.

  • FREEZE FRAME DATA is available.

  • The DTC is stored in the PCM memory.

POSSIBLE CAUSE

  • Poor connection at the PCM or OCV connector

  • Short to power circuit in wiring between OCV terminal A and PCM terminal 2E

  • OCV malfunction

  • PCM malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
  • Has 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 OCV CONNECTOR FOR POOR CONNECTION
  • Turn the ignition switch off.

  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

  • Is there any malfunction?

Yes

Repair or replace the terminal, then go to Step 7.

No

Go to the next step.

4

INSPECT OCV

Yes

Go to the next step.

No

Replace the OCV, then go to Step 7.

(SeeOIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [LF].)

5

INSPECT PCM CONNECTOR FOR POOR CONNECTION
  • Turn the ignition switch off.

  • Disconnect the PCM connector.

  • Inspect for poor connection at PCM terminal 2E (such as damaged, pulled-out pins, corrosion).

  • Is there malfunction?

Yes

Repair the terminal, then go to Step 7.

No

Go to the next step.

6

INSPECT OCV CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY
  • Remove the OCV.

  • Turn the ignition switch to the ON position (Engine off).

  • Measure the voltage between PCM terminal 2E and body ground.

  • Is the voltage B+?

Yes

Repair or replace the wiring harness for short to power supply, then go to the next step.

No

Go to the next step.

7

VERIFY TROUBLESHOOTING OF DTC P2089 COMPLETED
  • Make sure to reconnect all disconnected connectors.

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

  • Turn the ignition switch off.

  • Start the engine and warm it up completely.

  • Is the same DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [LF].)

No

Go to the next step.

8

VERIFY AFTER REPAIR PROCEDURE

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [LF].)

No

Troubleshooting completed.




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