W/Harness Inspection

Engine Control
P0558 Brake Booster Pressure Sensor Circuit High - Inspection/Repair:_:W/Harness Inspection

Terminal & 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 Open or Short in power circuit
1. IG KEY "OFF".
2. Disconnect BVS connector.
3. IG KEY "ON"
4. Measure the voltage between power terminal of BVS harness connector and chassis ground.

Specification :Approx 5V




5. Is the measured voltage within specification ?






Signal Circuit Inspection

Check Open in signal circuit
1. IG KEY "OFF".
2. Disconnect BVS connector.
3. IG KEY "ON" & ENG "OFF"
4. Measure the voltage between signal terminal of BVS harness connector and chassis ground.

Specification :Approx 5V




5. Is the measured voltage within specification ?






Ground Circuit Inspection

Check open in ground circuit
1. IG KEY "OFF".
2. Disconnect BVS connector.
3. Measure the resistance between sensor terminal of BVS harness connector and chassis ground.

Specification :Below 1Ohms




4. Is the measured resistance within specification ?