W/Harness Inspection

P2127 Accelerator Position Sensor 2 Signal Circuit Low 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?






Power Circuit Inspection

Check voltage
1. IG "OFF" and disconnect APS connector.
2. IG "ON"
3. Measure voltage between APS2 power terminal of APS harness connector and chassis ground.

Specification : Approx. 5 V




4. Is the measured voltage within specification?






Signal Circuit Inspection

Check short to ground in harness
1. IG "OFF".
2. Disconnect APS connector and PCM connector.
3. Measure resistance between APS2 signal terminal of APS harness connector and chassis ground. (Measurement "A")
4. Measure resistance between APS2 signal and APS1 (2) ground terminals of APS harness connector. (Measurement "B")

Specification : Infinite








5. Is the measured resistance within specification?





Check open in harness
1. Disconnect APS connector and PCM connector.
2. Measure resistance between APS2 signal terminal of APS harness connector and APS2 signal terminal of PCM harness connector.

Specification : Approx. below 1 Ohms.




3. Is the measured resistance within specification?