W/Harness Inspection

Engine Control
P0660 Intake Manifold Tuning Valve Control Circuit/Open (Bank 1) - 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 VIS1 connector.
2. IG "ON".
3. Measure voltage between power terminal of VIS1 harness connector and chassis ground.

Specification :Approx. B+




4. Is the measured voltage within specification ?






Control Circuit Inspection

Check short to ground in harness
1. IG "OFF" and disconnect VIS1 connector and PCM connector.
2. Measure resistance between control terminal of VIS1 harness connector and chassis ground.

Specification :Infinite




3. Is the measured resistance within specification ?





Check open in harness
1. IG "OFF" and disconnect VIS1 connector and PCM connector.
2. Measure resistance between control terminal of VIS1 harness connector and VIS1 control terminal of PCM harness connector.

Specification :Below 1Ohms




3. Is the measured resistance within specification ?