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DTC P0102 [MZR-CD (RF Turbo)]

BME010200102244

DTC P0102 | Mass air flow (MAF) sensor circuit low input
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DETECTION CONDITION | • The PCM monitors the input signal from the air flow sensor. If the voltage from the air flow sensor is less than 0.15 V, the PCM determines that there is a malfunction in the air flow sensor circuit. Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • MAF sensor malfunction • Connector or terminal malfunction • Open circuit in wiring harness between PCM control relay terminal C and MAF/IAT sensor terminal A • Open circuit in wiring harness between MAF/IAT sensor terminal C and PCM terminal 9
• Short to GND in wiring harness between MAF/IAT sensor terminal C and PCM terminal 9
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 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 | VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the WDS or equivalent to the DLC-2. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the same DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Perform the "INTERMITTENT CONCERN TROUBLESHOOTING". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
4 | INSPECT MAF/IAT SENSOR CONNECTOR FOR POOR CONNECTION • Turn the engine 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 terminal, then go to Step 10.
No | Go to the next step.
5 | INSPECT MAF SENSOR POWER CIRCUIT FOR OPEN CIRCUIT • Turn the engine switch to the ON position (Engine off). • Measure the voltage between MAF/IAT sensor terminal A (wiring harness-side) and body GND. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit or short to GND, then go to Step 10.
6 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO GND • Turn the engine switch off. • Inspect for continuity between MAF/IAT sensor terminal C (wiring harness-side) and body GND. • Is there continuity? | Yes | Repair or replace the wiring harness for a possible short to GND, then go to Step 10.
No | Go to the next step.
7 | INSPECT MAF SENSOR • Inspect the MAF sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace the MAF/IAT sensor, then go to Step 10.
No | Go to the next step.
8 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the PCM 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 10.
No | Go to the next step.
9 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Turn the engine switch off. • Inspect for continuity between MAF/IAT sensor terminal C (wiring harness-side) and PCM terminal 9 (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0102 COMPLETED • Make sure to reconnect all 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.
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the Repair Verification Drive Mode. (See OBD DRIVE MODE [MZR-CD (RF Turbo)].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | DTC troubleshooting completed.