Notes On Fault Tree
If Code P080 does not change to history following the completion of the TP Sensor/Idle Learn Procedure, this may be due to incorrect or erratic signals from the following sensors:
- Throttle Position Sensor
- TP Sensor
- Vehicle Speed Sensor
- Transaxle Range Switch (Park/Neutral Input)
- Power Steering Pressure Switch
- Brake Switch
High electrical loads may disable TP Sensor/Idle Learn. Components that may produce a high electrical load are the headlamps, rear defogger, high HVAC blower and the high speed cooling fans. If difficulty is encountered learning TP Sensor Idle Values (i.e. Code P080 remains current), turn off these high electrical loads, and then momentarily increase engine speed to above 1000 RPM to clear high electrical load. Since the engine cooling fans can not be manually controlled, engine coolant temperature must be below 105 degrees C and the A/C temperature set below 51 degrees C in order to turn "OFF" the high speed cooling fans and their high electrical load.
Code P080 may also remain current if the idle is rough or unstable. Correct problems with these sensor's signals or the idle before attempting to perform the TP Sensor/Idle Learn procedure.