W/Harness Inspection

Engine Control
P2123 Accelerator Position Sensor 1 Signal Circuit High Input - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness 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?






Signal Circuit Inspection

Check short to battery in harness
1. IG "OFF" and disconnect APS connector and PCM connector.
2. Measure resistance between APS1 signal and APS1 power terminals of APS harness connector.
3. Measure resistance between APS1 signal and APS2 power terminals of APS harness connector.

Specification :Infinite




4. Is the measured resistance within specification ?






Ground Circuit Inspection

Check open in harness
1. IG "OFF" and disconnect APS connector.
2. Measure voltage between APS1 power terminal of APS harness connector and chassis ground.(Measurement "A")
3. Measure voltage between APS1 power and APS1 ground terminals of APS harness connector.(Measurement "B")

Specification :Voltage difference between measurement "A" and "B" is below 200mV.








4. Is the measured voltage within specification ?