W/Harness Inspection

Engine Control
P2501 AMS Voltage Rationality - 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 of ECM
1. Engine starts.
2. Measure the voltage between on/start input terminal of ECM and B terminal of alternator.

Specification :Below 1.0V




3. Is the measured voltage within specification?





Check Battery Voltage
1. Engine starts.
2. Measure the voltage between + terminal of battery and B terminal of alternator.

Specification :Below 1.0V




3. Is the measured voltage within specification?