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Home >> Mazda >> 2007 >> 6 Mazdaspeed >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3 With TC] >> DTC P0108 >> Diagnostic procedure
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Diagnostic procedure

DTC P0108 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 FREEZE FRAME DATA on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or online repair information availability.
  • Is any related repair information available?
 Yes Perform the 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 CONNECTION OF MAP SENSOR CONNECTOR 
  • Turn the ignition switch off.
  • Verify that the MAP sensor connector is connected securely.
  • Is the connection normal?
 Yes Go to the next step.
No Reconnect the connector, then go to Step 9.
4 INSPECT MAP SENSOR CONNECTOR FOR POOR CONNECTION 
  • Disconnect the MAP sensor connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the suspected terminal, then go to Step 9.
No Go to the next step.
5 VERIFY MAP SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between MAP sensor terminal A (harness-side) and body ground.
  • Is there continuity?
 Yes Go to the next step.
No Inspect for an open circuit between PCM terminal 2H (harness-side) and MAP sensor terminal A (harness-side). Repair or replace the suspected wiring harness, then go to Step 9.
6 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged, pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair terminal, then go to Step 9.
No Go to the next step.
7 VERIFY MAP SENSOR SIGNAL CIRCUIT FOR SHORT TO CONSTANT VOLTAGE CIRCUIT 
  • Inspect for continuity between MAP sensor terminal D and C (harness-side).
  • Is there continuity?
 Yes Repair or replace the suspected wiring harness, then go to Step 9.
No Go to the next step.
8 VERIFY MAP SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between MAP sensor terminal D (harness-side) and PCM terminal 1J (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the suspected wiring harness, then go to the next step.
9 VERIFY TROUBLESHOOTING OF DTC P0108 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn ignition switch to the ON position (Engine off).
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start the engine and warm it up completely.
  • Is same DTC present?
 Yes Replace 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 applicable inspection.
(See DTC TABLE ).
No Troubleshooting completed.
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