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Home >> Mazda >> 2010 >> 5 Touring, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3] >> DTC P0108 >> Diagnostic procedure
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Diagnostic procedure

DTC P0108 [L3] DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA (MODE 12) HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA (Mode 12) been recorded?
Yes Go to the next step.
No Record the FREEZE FRAME DATA (Mode 12) 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 CONNECTION OF MAP SENSOR CONNECTOR 
  • Turn the ignition switch off.
  • Verify that the MAP sensor connector is connected securely.
  • Is connection normal?
Yes Go to the next step.
No Reconnect the connector, then go to Step 9.
4 INSPECT POOR CONNECTION OF MAP SENSOR CONNECTOR 
  • 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 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 the MAP sensor terminal A (wiring-harness-side) and body ground.
  • Is there continuity?
Yes Go to the next step.
No Inspect for open circuit in wiring harness between PCM terminal 2AV (wiring-harness-side) and MAP sensor terminal A (wiring-harness-side). Repair or replace suspected harness, then go to Step 9.
6 INSPECT PCM CONNECTOR 
  • Disconnect the PCM connector.
  • Inspect for poor connection at terminals (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 VERIFY MAP SENSOR SIGNAL CIRCUIT FOR SHORT TO CONSTANT VOLTAGE CIRCUIT 
  • Inspect for continuity between MAP sensor terminal D and C (wiring-harness-side).
  • Is there continuity?
Yes Repair or replace the 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 following:
    • MAP sensor terminal D (wiring-harness-side) and PCM terminal 2AG (wiring-harness-side)
    • MAP sensor terminal C (wiring-harness-side) and PCM terminal 2AU (wiring-harness-side)
  • Is there continuity?
Yes Replace the MAP sensor.
(See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL/INSTALLATION .)
Go to the next step.
No Repair or replace the wiring harness, then go to the next step.
9 VERIFY TROUBLESHOOTING OF DTC P0108 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS.

    (See AFTER REPAIR PROCEDURE .)

  • Perform the KOEO/KOER self test.

    (See KOEO/KOER SELF TEST .)

  • 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 troubleshooting.
(See DTC TABLE .)
No Troubleshooting completed.