DTC P0112[L3 Turbo]

id0102b7803700

DTC P0112

IAT circuit low input

DETECTION CONDITION

•  The PCM monitors the IAT sensor signal. If the PCM detects on IAT sensor voltage is below 0.06 V, the PCM determines that the IAT sensor circuit has a malfunction.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA is available.

•  DTCs are stored in the PCM memory.

POSSIBLE CAUSE

•  IAT sensor malfunction

•  Poor connection at the MAF/IAT sensor or PCM connector

•  Short to ground between MAF/IAT sensor terminal D and PCM terminal 1M

•  Short to each harness IAT signal circuit and IAT ground circuit.

•  PCM malfunction

DTC P0112	IAT circuit low input
DETECTION CONDITION	• The PCM monitors the IAT sensor signal. If the PCM detects on IAT sensor voltage is below 0.06 V, the PCM determines that the IAT sensor circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• IAT sensor malfunction • Poor connection at the MAF/IAT sensor or PCM connector • Short to ground between MAF/IAT sensor terminal D and PCM terminal 1M • Short to each harness IAT signal circuit and IAT ground circuit. • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		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 the repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT IAT SENSOR TERMINAL • Turn the ignition switch off. • Disconnect the MAF/IAT sensor connector. • Inspect for bent terminal of MAF/IAT sensor terminals D and E (part-side). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 7.
3		No	Go to the next step.
4	CLASSIFY IAT SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION • Connect the M-MDS to DLC-2. • Access the IAT PID. • Verify the IAT value when disconnecting the MAF/IAT sensor connector. • Does the IAT value change?	Yes	Replace the MAF/IAT sensor, then go to Step 7.
4		No	Go to the next step.
5	INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for continuity between MAF/IAT sensor terminal D (harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for a short to ground, then go to Step 7.
5		No	Go to the next step.
6	INSPECT IAT CIRCUITS FOR SHORT • Inspect for continuity between MAF/IAT sensor terminals D and E (harness-side). • Is there continuity?	Yes	Repair or the replace harness for a short, then go to the next step.
6		No	Go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P0112 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 M-MDS. • Start the engine and warm it up completely. • Is same DTC present?	Yes	Replace PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[L3 Turbo].)
7		No	Go to the next step.
8	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].)
8		No	Troubleshooting completed.