DTC P0112:00 [MZI-3.7]

id0102d2701400

DTC P0112:00 | IAT sensor circuit low input
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DETECTION CONDITION | • Indicates that the sensor signal is less than the self-test minimum. The IAT sensor minimum is 0.2 V or 121 °C {250 °F}.
POSSIBLE CAUSE | • IAT sensor malfunction • Connector or terminal malfunction • Short to ground circuit between MAF/IAT sensor terminal F and PCM terminal 1P

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 IAT SENSOR TERMINAL • Turn the ignition switch off. • Disconnect MAF/IAT sensor connector. • Inspect for bent terminal of MAF/IAT sensor terminals E and F (part-side). • Is there any malfunction? | Yes | Repair or replace suspected part, then go to Step 6.
No | Go to the next step.
4 | CLASSIFY IAT SENSOR MALFUNCTION OR HARNESS MALFUNCTION • Connect M–MDS to DLC-2. • Access IAT PID. • Verify IAT value when disconnecting MAF/IAT sensor connector. • Does IAT value change? | Yes | Replace MAF/IAT sensor or harness, then go to Step 6.
No | Go to the next step.
5 | INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO GROUND • MAF/IAT sensor connector is disconnected. • Turn the ignition switch off. • Disconnect PCM connector. • Inspect continuity between MAF/IAT sensor terminal F (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace suspected part, then go to the next step.
No | Go to the next step.
6 | VERIFY TROUBLESHOOTING OF DTC P0112:00 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.
7 | 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.