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DTC P0102 [L3 Turbo]

id0102b7803200

DTC P0102 | MAF circuit low input
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DETECTION CONDITION | • PCM monitors input voltage from the MAF sensor when engine is running. If the input voltage is below 0.21 V, the PCM determines that the MAF circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if the PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE | • MAF sensor malfunction • Connector or terminal malfunction • Short to ground in the wiring harness between MAF/IAT sensor terminal C and PCM terminal 1P • Open circuit in the wiring harness between MAF/IAT sensor terminal C and PCM terminal 1P • Open circuit in the wiring harness between main relay and MAF/IAT sensor terminal A

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS 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 Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service 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 8.
No | Go to the next step.
4 | INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Turn ignition switch to the ON position (Engine off). • Inspect voltage at MAF/IAT sensor terminal A (harness-side). • Is voltage B+? | Yes | Go to the next step.
No | Inspect for an open circuit in the wiring harness between MAF/IAT sensor terminal A (harness-side) and the main relay. Repair or replace the wiring harness, then go to Step 8.
5 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • 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 terminal, then go to Step 8.
No | Go to the next step.
6 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Remove the PCM with the PCM connector connected. • Inspect for continuity between MAF/IAT sensor terminal C (harness-side) and PCM terminal 1P (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or the replace suspected wiring harness, then go to Step 8.
7 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT CIRCUIT • Inspect for continuity between the MAF/IAT sensor terminal C (harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the suspected harness, then go to the next step.
No | Replace the MAF/IAT sensor, then go to the next step.
8 | VERIFY TROUBLESHOOTING OF DTC P0102 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine and warm it up completely. • Is the same DTC present? | Yes | Replace PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No | Troubleshooting completed.