Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - CHECKING THE ACCELERATOR PEDAL POSITION SENSOR CALIBRATION
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 |
NOTE:
The APP Sensor is a device that contains 2 separate potentiometer type sensors. Each sensor has its own 5-volt supply circuit, sensor ground circuit and signal circuit.
NOTE:
The APP Sensor 2 signal should always be approximately 1/2 the voltage of the APP Sensor 1 signal. Inspect the APP Sensor for proper travel from the rest position to the fully depressed position.Turn the ignition on.Using a voltmeter, backprobe the APP Sensor 1 and APP Sensor 2 Signal circuits at the APP Sensor harness connector with the accelerator pedal in the at rest position.Is the voltage between 0.42 and 0.51 volt for sensor 1 and 0.19 and 0.28 volt for sensor 2?Yes --> Go To 2No --> Check the wiring and connectors related to the APP Sensor. If OK., replace the APP Sensor.Perform ROAD TEST VERIFICATION - VER-2 . |
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| 2 | Turn the ignition on. While back probing, measure the voltage of the APP Sensor Signal 1 and APP Sensor Signal 2 circuits at the ECM. Monitor the voltmeter while slowly pressing the accelerator pedal completely down. Did the voltage for both sensors increase smoothly with pedal travel? Yes --> Go To 3 No --> Replace the Accelerator Pedal Position Sensor in accordance with the Service Information. Perform ROAD TEST VERIFICATION - VER-2 . |
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| 3 | Turn the ignition on. Using a voltmeter backprobe the APP Sensor harness connector and read the voltage for APP Sensor 1 and APP Sensor 2 Signal circuits. Fully depress the accelerator pedal. Is the voltage between 4.45 and 4.75 volts for #1 and 2.15 and 2.45 volts for #2? Yes --> Test Complete. No --> Check the wiring and connectors related to the APP Sensor. If OK., replace the APP Sensor. Perform ROAD TEST VERIFICATION - VER-2 . |
All |