W/Harness Inspection

Engine

Engine Control - P0121 Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance - W/Harness Inspection

Terminal and Connector Inspection

NOTE:
Check for open or short circuit in harness. Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?