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Diagnostic procedure

DTC P0103 [L3] 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 FREEZE FRAME DATA on 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 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 MAF SENSOR CONNECTOR FOR POOR CONNECTION 
  • 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 terminals, then go to Step 7.
No Go to the next step.
4 INSPECT MAF SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage between MAF/IAT sensor terminal C (harness-side) and body ground.
  • Is voltage 0 V  ?
 Yes Go to the next step.
No Repair or replace suspected harness, then go to Step 7.
5 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair terminal, then go to Step 7.
No Go to the next step.
6 INSPECT MAF SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT 
  • Remove PCM with PCM connector connected.
  • Inspect for continuity between MAF/IAT sensor terminal B (harness-side) and GND.
  • Is there continuity?
 Yes Replace MAF/IAT sensor, then go to the next step.
No Repair or replace suspected harness, then go to the next step.
7 VERIFY TROUBLESHOOTING OF DTC P0103 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn ignition switch to ON (Engine off).
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start 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.
8 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection. (See DTC TABLE .)
No Troubleshooting completed.
(1) California emission regulation applicable ATX model
(2) Except for California emission regulation applicable ATX model
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