Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Automatic Air Conditioner / Dtc/circuit Diagnosis / Sunload Sensor

Nissan Sentra B18 (2020-2025) Service Manual: Sunload Sensor

Diagnosis Procedure

Diagnosis Procedure

CHECK SUNLOAD SENSOR SIGNAL

Ignition switch ON.

Check voltage between A/C auto amp. harness connector.

A/C auto amp.	Voltage (Approx.)
M34	47	78

A/C auto amp.

Voltage

(Approx.)

Connector

Terminals

M34

Is the inspection result normal?

YES >>

Inspection End.

NO >>

GO TO 2.

CHECK SUNLOAD SENSOR POWER SUPPLY

Ignition switch OFF.
Disconnect sunload sensor connector.
Ignition switch ON.

Check voltage between sunload sensor harness connector and ground.

+	−	Voltage (Approx.)
M70	1	Ground	5 V

−

Voltage

(Approx.)

Sunload sensor

Connector

Terminal

M70

Ground

5 V

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

GO TO 5.

CHECK SUNLOAD SENSOR GROUND CIRCUIT FOR OPEN

Ignition switch OFF.
Disconnect A/C auto amp. connector.

Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.

Sunload sensor		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M70	2	M34	78	Yes

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

Repair harness or connector.

REPLACE SUNLOAD SENSOR
1. Replace sunload sensor. Refer to Removal and Installation.
Is the inspection result normal?
YES >>
Inspection End.
NO >>
Replace A/C auto amp. Refer to Removal and Installation.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN

Ignition switch OFF.
Disconnect A/C auto amp. connector.

Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.

Sunload sensor		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M70	1	M34	47	Yes

Is the inspection result normal?

YES >>

GO TO 6.

NO >>

Repair harness or connector.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between sunload sensor harness connector and ground.

Sunload sensor		—	Continuity
Connector	Terminal	—	Continuity
M70	1	Ground	No

Check voltage between sunload sensor harness connector and ground.

+	−	Voltage (Approx.)
M70	1	Ground	0 V

−

Voltage

(Approx.)

Sunload sensor

Connector

Terminal

M70

Ground

0 V

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

Repair harness or connector.

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