Connect scantool to Data Link Cable (DLC).
Warm up engine to normal operating temperature.
Monitor "Acceleration Position Sensor & Engine Speed" parameter on the scantool .
Fig 1) APS signal and engine speed increase when depressing accel pedal.
4. Is the Current data displayed correctly ?
YES
Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
▶ Go to "W/Harness Inspection" procedure.