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DTC P0103 [MZR-CD (RF Turbo)]

BME010200100W23

DTC P0103 | MAF sensor circuit high input
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DETECTION CONDITION | • PCM monitors input voltage from MAF sensor while engine is running. If input voltage from MAF sensor is above 4.9 V, PCM determines MAF sensor circuit high input.
POSSIBLE CAUSE | • MAF sensor malfunction • Connector or terminal malfunction • Short to power circuit in wiring between MAF/IAT sensor terminal C and PCM terminal 9 • MAF sensor power and signal circuits short each other • Open circuit in wiring between MAF/IAT sensor terminal B and PCM terminal 14
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform "DTC Confirmation Procedure". (See DTC CONFIRMATION PROCEDURE [MZR-CD (RF Turbo)].) • Is same DTC present during KOEO or KOER self-test? | Yes | Go to next step.
No | Intermittent concern exists. Go to "Intermittent Concern Troubleshooting". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
2 | INSPECT POOR CONNECTION OF MAF SENSOR CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 8.
No | Go to next step.
3 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER • Turn engine switch to ON. (Engine OFF) • Inspect voltage between MAF/IAT sensor terminal C and body GND. • Is voltage below 1.0 V? | Yes | Go to next step.
No | Repair or replace harness for short to power, go to Step 8.
4 | INSPECT MAF SENSOR CIRCUIT FOR SHORT WITH EACH OTHER • Turn engine switch to OFF. • Inspect continuity between MAF/IAT sensor terminals A and C. • Is there continuity? | Yes | Repair or replace harness for short with each other, go to Step 8.
No | Go to next step.
5 | INSPECT MAF SENSOR • Inspect MAF sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace MAF/IAT sensor, go to Step 8. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
6 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 8.
No | Go to next step.
7 | INSPECT MAF SENSOR GND CIRCUIT FOR OPEN • Turn engine switch to OFF. • Inspect continuity between MAF/IAT sensor terminal B and PCM terminal 14. • Is there continuity? | Yes | Go to next step.
No | Repair or replace harness for open, go to next step.
8 | VERIFY TROUBLESHOOTING OF DTC P0103 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from PCM memory using WDS or equivalent. • Perform KOEO/KOER self-test. (See KOEO/KOER SELF-TEST PROCEDURE [MZR-CD (RF Turbo)].)
• Is same DTC present?
Yes
Replace PCM, go to next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is there any DTC present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.