Checking the Accelerator Pedal Position Sensor Calibration

*CHECKING THE ACCELERATOR PEDAL SENSOR CALIBRATION







Diagnostic Test


1. MIS-WIRED APPS
Turn the ignition off.
Remove the APPS cover.
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 POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test



2. THROTTLE PEDAL NOT MOVING FREELY
Ignition on, engine not running.
Look for proper Throttle operation.
Does the Throttle Pedal move freely between the upper and lower stops?

Yes


- Replace the APPS.
- Perform POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test


No


- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test