P0110

INTAKE AIR TEMPERATURE SENSOR





Symptom Of Fault.
The CHECK ENGINE lamp (MIL) is on.

Conditions.
P0110: All-embracing DTC.
P0112: Ignition switch in the ON position: <0.06 V for 5 seconds.
P0113: Ignition switch in the ON position: >4.96 V for 5 seconds.

Diagnostic Help.
The temperature sensor reading can be obtained on an ISAT scan tool.
- Turn the ignition switch to the ON position and then back to the OFF position.
- Connect an ISAT scan tool.
- Select "READ FUNCTIONS".
- Select "INTAKE AIR TEMP". If the temperature sensor is in perfect working order the ISAT scan tool should show the current intake air temperature.





Diagnostic Procedure.
1. Check the temperature sensor's grounding
- Unplug the temperature sensor's 2-pin connector.
- Connect the test lamp to: Battery positive (B+) and pin 2.

Is the test lamp on?
YES:
^ Continue with point 2.
NO:
^ Rectify the lead in question and proceed to point 3.






2. Check the electronic control module's temperature sensor input
- Turn the ignition switch to the ON position and then back to the OFF position.
- Unplug the temperature sensor's 2-pin connector.
- Connect an ISAT scan tool.
- Select "READ FUNCTIONS".
- Select"INTAKE AIR TEMP".
The reading obtained on the ISAT scan tool should be about -40°C (-40°F).
- Connect a jumper lead between pins 1 and 2 of the temperature sensor connector.
The reading obtained on the ISAT scan tool should be about +123°C (+253°F).

Are all readings OK?
YES:
^ Change the temperature sensor and continue with point 3.
NO:
^ Rectify, the lead in question and proceed to point 3.





3. Final check:
- Clear the diagnostic trouble code.
- Implementation of driving cycle: Drive the car at varying loads and engine rpm for 5 minutes.
- Evaluation of driving cycle: Check whether the diagnostic trouble code has recurred.

Has the diagnostic trouble code recurred?
YES:
^ Proceed at "Before Replacing a Control Module". Component Tests and General Diagnostics
NO:
^ The remedial measure taken was correct.