Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure

Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Charging System :: Dtc/circuit Diagnosis / B Terminal Circuit / Diagnosis Procedure

Diagnosis Procedure

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

CHECK “B” TERMINAL CONNECTION
1. 1. Ignition switch OFF.
  2. Check if “B” terminal is clean and tight.
Is the inspection result normal?
YES >>
GO TO 2.
NO >>
Repair terminal “B” connection. Confirm repair by performing system test using the 165-DSS-5000P. Refer to applicable Instruction Manual for proper testing procedures.

CHECK “B” TERMINAL CIRCUIT

Check voltage between generator “B” terminal and ground.

(+)	(-)	Voltage (Approx.)
F14	1	Ground	Battery voltage

(+)

(-)

Voltage

(Approx.)

Generator

Connector

Terminal

F14

Ground

Battery voltage

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Check harness for open between generator and fusible link.

CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)

Start engine, then engine running at idle and warm.

Check voltage between battery positive terminal and generator connector “B” terminal.

(+)	(-)	Voltage (Approx.)
F14	1	Battery positive terminal	Less than 0.2 V

(+)

(-)

Voltage

(Approx.)

Generator

Connector

Terminal

F14

Battery positive terminal

Less than 0.2 V

Is the inspection result normal?

YES>>

“B” terminal circuit is normal. Refer to Work Flow (With 165-DSS-5000P) or Work Flow (Without 165-DSS-5000P).

NO>>

Check harness between battery and generator for continuity.

B Terminal Circuit

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