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Home >> Mazda >> 2006 >> 5 Touring, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3) >> DTC P0103 >> Diagnostic Procedure

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 POOR CONNECTION OF MAF SENSOR CONNECTOR 
  • Turn the ignition switch off.
  • Disconnect the MAF/IAT sensor connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminals, then go to Step 7.
No Go to the next step.
4 INSPECT MAF SIGNAL CIRCUIT FOR SHORT TO POWER CIRCUIT 
  • Turn the ignition switch to the ON position. (Engine off)
  • Measure the voltage between MAF/IAT sensor terminal C and body ground.
  • Is the voltage 0 V  ?
 Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 7.
5 INSPECT POOR CONNECTION OF PCM CONNECTOR 
  • Turn the ignition switch off.
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair the terminal, then go to Step 7.
No Go to the next step.
6 INSPECT MAF SENSOR GROUND FOR OPEN CIRCUIT 
  • Remove the PCM with the PCM connector connected.
  • Inspect for continuity between MAF/IAT sensor terminal B and body ground.
  • Is there continuity?
 Yes Replace MAF/IAT sensor, then go to the next step.
(See INTAKE AIR SYSTEM REMOVAL/INSTALLATION ).0
No Go to the next step.
7 VERIFY TROUBLESHOOTING OF DTC P0103 COMPLETED 
  • Make sure to reconnect all the disconnected connectors.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start the engine.
  • 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.
8 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC troubleshooting.
(See DTC TABLE ).
No Troubleshooting completed.
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