Accelerator Pedal Position Sensor: Testing and Inspection

CHECKING THE ACCELERATOR PEDAL SENSOR CALIBRATION






1. MIS-WIRED APPS
1. Turn the ignition off.
2. Remove the APPS cover.
3. Inspect both APPS connector and ECM for proper wiring.

Are both connectors wired correctly?

Yes

- Go To 2

No

- Repair mis-wired APPS connector at APPS or ECM.
- Perform the ECM VERIFICATION TEST. Powertrain Verification Test

2. THROTTLE PEDAL NOT MOVING FREELY
1. Ignition on, engine not running.
2. Look for proper Throttle operation.

Does the Throttle Pedal move freely between the upper and lower stops?

Yes

- Replace the APPS.
- Perform the ECM VERIFICATION TEST. Powertrain Verification Test

No

- Repair as necessary.
- Perform the ECM VERIFICATION TEST. Powertrain Verification Test