DTC P0104:00 [MZI-3.7]

id0102d2146600

DTC P0104:00 | MAF circuit intermittent/erratic
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DETECTION CONDITION | • A concern exists in the MAF sensor circuit, or the air tube containing the sensor, causing an incorrect air flow reading.
POSSIBLE CAUSE | • Air leaks in the tube from the MAF to the throttle body • Connector or terminal malfunction • Short to power supply in wiring harness between MAF sensor terminal C and PCM terminal 1AN • Short to power supply in wiring harness between MAF sensor terminal D and PCM terminal 1AR • Short to ground circuit between MAF sensor terminal C and PCM terminal 1AN • Short to ground circuit between MAF sensor terminal D and PCM terminal 1AR • 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

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 | VERIFY RELATED PENDING CODE OR STORED DTC • Verify the related PENDING CODE or stored DTCs. • Are other DTCs present? | Yes | Go to appropriate DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Go to the next step.
4 | INSPECT AIR SUCTIONING BETWEEN MAF SENSOR AND TP SENSOR • Inspect for major leaks, cracks and openings between MAF sensor and throttle body. • Are there any malfunction? | Yes | Repair or replace the malfunctioning part, then go to Step 10.
No | Go to the next step.
5 | 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 the malfunctioning part, then go to Step 10.
No | Go to the next step.
6 | INSPECT MAF SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • MAF/IAT sensor connector is disconnected. • Turn the ignition switch to the ON position (Engine off). • Measure voltage between the following terminals: ― MAF sensor terminal C (wiring harness-side) and body ground ― MAF sensor terminal D (wiring harness-side) and body ground • Are there voltage B+? | Yes | Repair or replace the malfunctioning part, then go to Step 10.
No | Go to the next step.
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 for continuity between the following circuits: ― MAF sensor terminal C (wiring harness-side) and body ground ― MAF sensor terminal D (wiring harness-side) and body ground • Are there continuity? | Yes | Repair or replace the malfunctioning part, then go to Step 10.
No | Go to the next step.
8 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are there any malfunction? | Yes | Repair or replace the malfunctioning part, then go to Step 10.
No | Go to the next step.
9 | INSPECT MAF SENSOR CIRCUIT FOR OPEN CIRCUIT • MAF/IAT sensor and PCM connectors are disconnected. • Turn the ignition switch off. • Inspect for continuity between the following terminals: ― 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 the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0104:00 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Clear DTC from memory using M-MDS. • Start the engine. • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [MZI-3.7].) • 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.