W/Harness Inspection

Engine Control
P2228 Barometric Pressure 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 BPS connector.
2. IG "ON".
3. Measure the voltage between power terminal of BPS harness connector and ground.

Specification :Approx. 5V




4. Is the measured voltage within specification?






Signal Circuit Inspection

Check short to ground in harness
1. IG "OFF".
2. Disconnect BPS and PCM connector.
3. Measure the resistance between signal terminal of BPS harness connector and ground.

Specification :Infinite




4. Is the measured resistance within specification?





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

Specification :Approx. below 1Ohms.




3. Is the measured resistance within specification?