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

Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Charging System :: Dtc/circuit Diagnosis / B20bd-96 Battery Current Sensor / Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK BATTERY CURRENT SENSOR POWER

Ignition switch OFF.
Disconnect battery current sensor connector.
Ignition switch ON.

Check the voltage between battery current sensor harness connector and ground.

(+)	(-)	Voltage (Approx.)
E39	4	Ground	4 – 6 V

(+)

(-)

Voltage

(Approx.)

Battery current sensor

Connector

Terminal

E39

Ground

4 – 6 V

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

GO TO 2.

CHECK BATTERY CURRENT SENSOR POWER CIRCUIT

Ignition switch OFF.
Disconnect IPDM E/R connector.

Check the continuity between battery current sensor harness connector and IPDM E/R harness connector.

Battery current sensor		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E39	4	F98	95	Yes

Check the continuity between battery current sensor harness connector and ground.

Battery current sensor		—	Continuity
Connector	Terminal	—	Continuity
E39	4	Ground	No

Is the inspection result normal?

YES >>

Replace IPDM E/R. Refer to Removal and Installation.

NO >>

Repair or replace harness.

CHECK BATTERY CURRENT SENSOR GROUND

Ignition switch OFF.

Check the continuity between battery current sensor harness connector and ground.

Battery current sensor		—	Continuity
Connector	Terminal	—	Continuity
E39	2	Ground	Yes

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

GO TO 4.

CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT

Disconnect IPDM E/R connector.

Check the continuity between battery current sensor harness connector and IPDM E/R harness connector.

Battery current sensor		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E39	2	F98	96	Yes

Check the continuity between battery current sensor harness connector and ground.

Battery current sensor		—	Continuity
Connector	Terminal	—	Continuity
E39	2	Ground	No

Is the inspection result normal?

YES >>

Replace IPDM E/R. Refer to Removal and Installation.

NO >>

Repair or replace harness.

CHECK BATTERY NEGATIVE TERMINAL CONNECTION
1. Check if battery negative terminal is clean and tight.
Is the inspection result normal?
YES>>
GO TO 6.
NO>>
Repair battery negative terminal connection.
CHECK BATTERY CURRENT SENSOR
1. Refer to Component Inspection.
Is the inspection result normal?
YES >>
Refer to Intermittent Incident. If the inspection result of the connector is normal then replace IPDM E/R. Refer to Removal and Installation.
NO >>
Replace battery current sensor. Refer to Removal and Installation.

Confirmation Procedure

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