P0113

DTC's P0110, P0112, P0113:

DIAGNOSTIC TROUBLE CODES PO11O, PO112, PO113
INTAKE AIR TEMPERATURE SENSOR, MALFUNCTIONING OR NOT WORKING AT ALL

Fault symptom
The malfunction indicator lamp is on.

Conditions.
If there is a short circuit/open circuit, a DTC will be generated after 5 seconds.

Diagnostic procedure
1. Check the operation of the temperature sensor using an ISAT scan tool.

- Ignition switched ON.
- Connect the ISAT scan tool and select the "INTAKE AIR TEMP" command on the "READ FUNCTIONS" menu.

The ISAT scan tool must show the intake manifold temperature.

Note that the ECM adopts the substitute value of 8°C in the event of an internal temperature sensor fault. This value is shown on the ISAT where appropriate.

- If the measured value is correct, continue with step 5.
- If the measured value is incorrect, continue with step 2.

DTC's P0110, P0112, P0113:

2. Check the electrical interface in the temperature sensor connector.

- Unplug the 2-pole connector.
- Measure the voltage in the female connector.
^ Pin 2 to Batt - _______ approx. 5 V.
^ Batt + to pin 1 _______ approx. 12 V.

Measure the current (mA) in the female connector.

- Pin 2 to pin 1 ______ approx. 1.8 mA.

The measurements above are to show whether ECM including wiring up to the temperature sensor are operating correctly.

- If all the measured values are correct, continue with step 3.
- If any measured value is incorrect, continue with step 4.

3. Check the resistance of the temperature sensor.

- Carry out resistance measurement in the temperature sensor connector.

The nominal resistance value is:

°C °F Resistance (kOhms)

-30 -22 20 - 30
-10 14 7.0 - 11.4
20 68 2.1 - 2.9
40 104 1.0 - 1.3
60 140 0.565 - 0.670
80 176 0.295 - 0.365
90 194 0.24 - 0.26

For more detailed values, see "Intake Air Temperature Sensor, Electrical Specifications".

- If the measured value is incorrect, install a new the temperature sensor.
- If the measured value is correct, continue with step 5.

DTC's P0110, P0112, P0113:

4. Check the continuity of the wiring between the ECM and the 2-pole connector of the temperature sensor.

- Check the leads for open circuits, short circuits and any stray current.
- If the measured values are correct, continue with step 5.

5. Erase the diagnostic trouble code and drive the car to see whether the DTC is generated again.

- If the diagnostic trouble code is registered, continue at "Procedure before replacing ECM".
- If the diagnostic trouble code is not registered, the action taken is correct. Otherwise the fault is intermittent in nature.