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Home >> Mazda >> 2007 >> 5 Sport, 2.3 L, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3) >> DTC P2088 >> Diagnostic Procedure
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Diagnostic Procedure

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 9.
No Go to the next step.
4 INSPECT OCV  Yes Go to the next step.
No Replace the OCV, then go to Step 9.
5 INSPECT OCV POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT 
  • Disconnect the OCV connector.
  • Turn the ignition switch to the ON position (Engine off).
  • Measure the voltage between variable tumble control solenoid valve terminal B and body ground.
  • Is the voltage B+  ?
 Yes Go to the next step.
No Repair or replace the wiring harness for open circuit, then go to Step 9.
6 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the PCM connector.
  • Inspect for poor connection at PCM terminal 2AF (such as damaged, pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair the terminal, then go to Step 9.
No Go to the next step.
7 INSPECT OCV CONTROL CIRCUIT FOR SHORT TO GROUND 
  • Inspect for continuity between OCV terminal A and body ground.
  • Is there continuity?
 Yes Repair or replace the wiring harness for short to ground, then go to Step 9.
No Go to the next step.
8 INSPECT OCV CONTROL CIRCUIT FOR OPEN CIRCUIT 
  • Connect the OCV connector.
  • Turn the ignition switch to the ON position (Engine off).
  • Inspect for continuity between OCV terminal A and PCM terminal 2AF.
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness for open or short circuit to ground, then go to the next step.
9 VERIFY TROUBLESHOOTING OF DTC P2088 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS or equivalent.
  • 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 ).
No Go to the next step.
10 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Troubleshooting completed.
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