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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 P0103 >> Diagnostic procedure
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Diagnostic procedure

DTC P0103 [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 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 (wiring-harness-side) 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 (wiring-harness-side) and body ground.
  • Is there continuity?
 Yes Replace MAF/IAT sensor, then go to the next step.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
No Repair or replace the wiring harness, then 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 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.
8 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC troubleshooting.
(See DTC TABLE .)
No Troubleshooting completed.
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