DTC P0112:00

DTC P0112:00	IAT sensor circuit low input
DETECTION CONDITION	The PCM monitors the IAT sensor signal. If the PCM detects that the IAT sensor voltage is below 0.1 V for 5 s , the PCM determines that the IAT sensor circuit has a malfunction. Diagnostic support note This is a continuous monitor (CCM). The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	MAF/IAT sensor connector or terminals malfunction Short to ground in wiring harness between MAF/IAT sensor terminal D and PCM terminal 1 AC PCM connector or terminals malfunction IAT sensor malfunction IAT sensor signal circuit and ground circuit are shorted to each other PCM malfunction

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT MAF/IAT SENSOR CONNECTOR CONDITION Switch the ignition to 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 the terminal and/or connector, then go to Step 8.
3		No	Go to the next step.
4	INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO GROUND MAF/IAT sensor connector is disconnected. Inspect for continuity between MAF/IAT sensor terminal D (wiring harness-side) and body ground. Is there continuity?	Yes	Repair or replace the wiring harness for a short to ground, then go to Step 8.
4		No	Go to the next step.
5	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 8.
5		No	Go to the next step.
6	VERIFY PID DATA FOR IAT SENSOR MALFUNCTION Reconnect the MAF/IAT sensor and PCM connectors. Access the IAT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST ). Verify the IAT value when disconnect the MAF/IAT sensor connector. Is the IAT value normal? (See PCM INSPECTION ).	Yes	Go to the next step.
6		No	Replace the MAF/IAT sensor, then go to Step 8. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION ).
7	INSPECT IAT SENSOR SIGNAL AND GROUND CIRCUITS FOR SHORT TO EACH OTHER Disconnect the MAF/IAT sensor and PCM connectors. Inspect for continuity between MAF/IAT sensor terminals D and E (wiring harness-side). Is there continuity?	Yes	Repair or replace the malfunctioning wiring harness, then go to the next step.
7		No	Go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE ). Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST ). Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION ). Go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ). Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE ).
9		No	DTC troubleshooting completed.