DTC P0102:00 [MZI-3.7]

id0102d2700900

DTC P0102:00 | MAF circuit low input
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DETECTION CONDITION | • The MAF sensor circuit is monitored by the PCM for low air flow (or voltage) input through the CCM. If during KOER the air flow (or voltage) changes below a minimum calibrated limit, the test fails.
POSSIBLE CAUSE | • Connector or terminal malfunction • Open circuit wiring harness between MAF sensor terminal A and main relay No.1 terminal D • Open circuit wiring harness between MAF sensor terminal C and PCM terminal 1AN • Open circuit wiring harness between MAF sensor terminal D and PCM terminal 1AR • Short to ground circuit between MAF sensor terminal D and PCM terminal 1AR • Open circuit wiring harness between MAF sensor terminal B and body ground • Intake air leak (near the MAF sensor) • A closed throttle indication • MAF sensor 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 FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED SERVICE 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). • Are there any malfunction? | Yes | Repair or replace suspected part, then go to Step 10.
No | Go to the next step.
4 | INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • MAF/IAT sensor connector is disconnected. • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between MAF sensor terminal A (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 10.
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). • Are there any malfunction? | Yes | Repair or replace suspected part, then go to Step 10.
No | Go to the next step.
6 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Remove PCM with PCM connector connected. • Inspect for continuity between the following circuits: ― MAF sensor terminal C (wiring harness-side) and PCM terminal 1AN (wiring harness-side) ― MAF sensor terminal D (wiring harness-side) and PCM terminal 1AR (wiring harness-side) • Are there continuity? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 10.
7 | INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND • MAF/IAT sensor connector is disconnected. • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect continuity between following circuits: ― MAF sensor connector terminal D (wiring harness-side) and body ground • Are there continuity? | Yes | Repair or replace suspected part, then go to the Step 10.
No | Go to the next step.
8 | INSPECT MAF SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • MAF/IAT sensor and PCM connectors are disconnected. • Inspect continuity between MAF sensor terminal B (wiring harness-side) and body ground. • Are there continuity? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 10.
9 | INSPECT THE MAF SENSOR • Inspect the MAF sensor (See MASS AIR FLOW (MAF) SENSOR INSPECTION [MZI-3.7].) • Are there any malfunction? | Yes | Replace the MAF/IAT sensor, then go to the next step. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [MZI-3.7].)
No | Go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0102:00 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Turn the ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start engine and warm it up completely. • Is same DTC present? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Troubleshooting completed.