B Terminal Circuit

B TERMINAL CIRCUIT

Description

"B" terminal circuit supplies power to charge the battery and to operate the vehicles electrical system.


Diagnosis Procedure


1. CHECK "B" TERMINAL CONNECTION

1.Turn ignition switch OFF.
2.Check if "B" terminal is clean and tight.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair "B" terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.

2. CHECK "B" TERMINAL CIRCUIT

Check voltage between alternator "B" terminal and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Check harness for open between alternator and fusible link.

3. CHECK "B" TERMINAL CONNECTION (VOLTAGE DROP TEST)

1.Start engine, then engine running at idle and warm.
2.Check voltage between battery positive terminal and alternator "B" terminal.





Is the inspection result normal?
YES- "B" terminal circuit is normal. Work Flow.
NO- Check harness between battery and alternator for poor continuity.