W/Harness Inspection

Engine Control

P2021 Intake Manifold Runner Valve Position Sensor Circuit Low - 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 VPS connector.
2. IG "ON".
3. Measure voltage between VPS power terminal of VPS 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 VPS connector and ECM connector.
3. Measure resistance between VPS signal terminal of VPS harness connector and chassis ground. (Measurement "A")
4. Measure resistance between VPS signal and VPS ground terminals of VPS harness connector. (Measurement "B")

Specification : Infinite
















5. Is the measured resistance within specification?





Check open in harness
1. IG "OFF" and disconnect VPS connector and ECM connector.
2. Measure resistance between VPS signal terminal of VPS harness connector and VPS signal terminal of ECM harness connector.

Specification : Approx. below 1 Ohms.








3. Is the measured resistance within specification?