Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit

Nissan Sentra B18 (2020-2025) Service Manual / Cruise Control & Driver Assistance / Driver Assistance System :: Driver Assistance System / Dtc/circuit Diagnosis / Power Supply and Ground Circuit

Side Radar Lh

Diagnosis Procedure

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown:

Signal name	Fuse No.
Ignition power supply	49 (10 A)

Is the fuse blown?

YES >>

Replace the blown fuse after repairing the affected circuit.

NO >>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect the side radar LH connector.
Check voltage between side radar LH harness connector and ground.

Terminal			Condition	Voltage (Approx.)
(+)		(−)
Side radar LH		Ground	Ignition switch
Connector	Terminal
B253	7		OFF	0 V
			ON	Battery voltage

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair the side radar LH power supply circuit.

CHECK GROUND CIRCUIT

Check continuity between side radar LH harness connector and ground.

Side radar LH		Ground	Continuity
Connector	Terminal
B253	9		Yes

Is the inspection result normal?

YES >>

Inspection End.

NO >>

Repair the side radar LH ground circuit.

Side Radar Rh

Diagnosis Procedure

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown:

Signal name	Fuse No.
Ignition power supply	49 (10 A)

Is the fuse blown?

YES >>

Replace the blown fuse after repairing the affected circuit.

NO >>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect the side radar RH connector.
Check voltage between side radar RH harness connector and ground.

Terminal			Condition	Voltage (Approx.)
(+)		(−)
Side radar RH		Ground	Ignition switch
Connector	Terminal
B254	7		OFF	0 V
			ON	Battery voltage

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair the side radar RH power supply circuit.

CHECK GROUND CIRCUIT

Check continuity between side radar RH harness connector and ground.

Side radar RH		Ground	Continuity
Connector	Terminal
B254	9		Yes

Is the inspection result normal?

YES >>

Inspection End.

NO >>

Repair the side radar RH ground circuit.

Distance Sensor

Diagnosis Procedure

Diagnosis Procedure

CHECK DISTANCE SENSOR POWER SUPPLY CIRCUIT

Check voltage between distance sensor harness connector and ground.

(+)		(–)	Condition	Standard voltage	Voltage (Approx.)
Distance sensor			Ignition switch
Connector	Terminal
E304	8	Ground	OFF	0 - 0.1 V	0 V
			ON	9.5 - 16 V	Battery voltage

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

Repair the distance sensor power supply circuit.

CHECK DISTANCE SENSOR GROUND CIRCUIT

Turn the ignition switch OFF.
Disconnect the distance sensor connector.

Check for continuity between distance sensor harness connector and ground.

Distance sensor		Ground	Continuity
Connector	Terminal
E304	1		Yes

Is the inspection result normal?

YES >>

Inspection End.

NO >>

Repair the distance sensor ground circuit.

Front Camera Unit

Diagnosis Procedure

Diagnosis Procedure

CHECK FUSES

Check if any of the following fuses are blown:

Signal name	Fuse No.
Ignition power supply	49(10A)

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

Replace the blown fuse after repairing the affected circuit if a fuse is blown.

CHECK FRONT CAMERA UNIT POWER SUPPLY CIRCUIT

Check voltage between front camera unit harness connector and ground.

Terminal			Condition	Voltage (Approx.)
(+)		(–)
Front camera unit		Ground	Ignition switch
Connector	Terminal
R9	1		OFF	0 V
			ON	Battery voltage

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair the front camera unit power supply circuit.

CHECK FRONT CAMERA UNIT GROUND CIRCUIT

Turn the ignition switch OFF.
Disconnect the front camera unit connector.

Check for continuity between front camera unit harness connector and ground.

Front camera unit		Ground	Continuity
Connector	Terminal
R9	10		Existed

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

Repair the front camera unit ground circuit.

Side Radar Right (side Radar Rh)

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