That it is not an A/C issue you are having issues with the air intake temperature sensor for the engine.
P0113
DTC P0113 IAT Sensor Circuit High Voltage (1 Of 2)
DTC P0113 IAT Sensor Circuit High Voltage (2 Of 2)
IAT Sensor Circuit
CIRCUIT DESCRIPTION
The Intake Air Temperature
(IAT) sensor is a thermistor located in the fresh air duct to the
throttle body in order to monitor the temperature of the air entering the throttle body. The Vehicle Control Module
(VCM) applies 5 volts to the sensor on 5 volt reference circuit. When the air is cool, the resistance in the sensor measures high and the VCM senses a high voltage signal. If the air is warm, the sensor resistance measures low and the VCM senses a low voltage signal. This DTC is a type A DTC.
CONDITIONS FOR SETTING THE DTC
The following items will set the DTC:
- No Engine Coolant Temperature (ECT) sensor DTCs.
- No Vehicle Speed (VS) sensor DTCs.
- No Mass Air Flow (MAF) sensor DTCs.
- The vehicle speed less than 2 mph.
- The MAF is less than 250 grams per second.
- The engine coolant temperature greater than 84.7°C.
- The engine run time is greater than 100 seconds.
- The intake air temperature voltage greater than 4.9.
ACTION TAKEN WHEN THE DTC SETS
The
VCM sets the DTC P0113 and turns ON the
Malfunction Indicator Lamp (MIL) when P0113 is reported and 1 failure has occurred.
CONDITIONS FOR CLEARING THE MIL/DTC
The
VCM turns the MIL off after 3 consecutive driving trips without a fault condition present. A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 40°F from the start-up coolant temperature and the engine coolant temperature exceeds 160°F during that same ignition cycle) or the scan tool clearing feature has been used.
DIAGNOSTIC AIDS
A scan tool indicates the temperature of the ambient air entering the
throttle body. The air temperature should read very close to the temperature of the outside air. The air temperature should rise gradually as the engine warms up and the underhood temperature increases. If DTC P1111 is set, the problem is intermittent. Check for poor connections at the
VCM and IAT sensor by wiggling the connector gently and monitoring the
IAT temperature or the IAT voltage on the scan tool. If the voltage waivers, repair the connector that caused the waiver. Also, a sensor may become skewed or mis-scaled. The Temperature vs. Resistance Value Table will help to detect a skewed sensor. Refer to Temperature vs Resistance
TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
Important: Use the same diagnostic test equipment for all the measurements.
- If the IAT sensor circuit voltage measures greater than 4.9 volts, the conditions for the DTC are still present, and the problem is not intermittent.
- This test will bypass the IAT sensor and will confirm that the IAT signal circuit and the sensor ground circuit to the VCM are sound. Grounding the signal circuit will provide a low voltage input to the VCM. The VCM should recognize this low voltage and indicate a high IAT temperature.
- This test determines if the IAT sensor signal circuit is okay. If the scan tool does not indicate a high temperature, the IAT signal circuit is open.
---------- Post added at 02:44 PM ---------- Previous post was at 02:40 PM ----------
At what speeds does your fan blow?
