B Terminal Circuit Check

B Terminal Circuit Check

Description

The terminal "1" (B) circuit supplies power to charge the battery and operate the vehicles electrical system.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Charging System: Wiring Diagram] [1][2]Charging System.

1. CHECK TERMINAL "1" CONNECTION

1 Turn ignition switch OFF.
2 Verify terminal "1" is clean and tight.

Is the inspection result normal?
YES
GO TO 2
NO
Repair terminal "1" connection. Confirm repair by performing complete Starting/Charging system test. Refer to diagnostic station instruction manual.

2. CHECK TERMINAL "1" CIRCUIT

Check voltage between generator connector E206 terminal 1 and ground.











Is voltage reading as specified?
YES
GO TO 3.
NO
Check harness for open between generator and fusible link.

3. CHECK TERMINAL "1" CONNECTION (VOLTAGE DROP TEST)

1 Start engine, then engine running at idle and warm.





2 Check voltage between battery positive terminal and generator connector E206 terminal 1.






Is the voltage reading as specified?
YES
Terminal "1" circuit is normal. Refer to [Diagnosis and Repair Workflow] Diagnosis and Repair Workflow.
NO
Check harness between battery and generator for high resistance.