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

Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Manual Air Conditioner / Dtc/circuit Diagnosis / Power Supply and Ground Circuit

A/c Amp.

Diagnosis Procedure

Diagnosis Procedure

CHECK A/C AMP. GROUND CIRCUIT FOR OPEN

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

Check continuity between A/C amp. harness connector and ground.

A/C amp.		—	Continuity
Connector	Terminal	—	Continuity
M82	58	Ground	Yes

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK FUSE

Check that the following fuse is not blown (open):

Component	Location	Fuse No.	Capacity
A/C amp.	Fuse block (J/B)	6	10 A

Is the fuse blown (open)?

YES>>

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

NO>>

GO TO 3.

CHECK A/C AMP. POWER SUPPLY

Connect A/C amp. connector.
Ignition switch ON.

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

+	–	Voltage (Approx.)
M82	60	Ground	Battery voltage

–

Voltage

(Approx.)

A/C amp.

Connector

Terminal

M82

Ground

Battery voltage

Is the inspection result normal?

YES>>

Replace A/C amp. Refer to Removal and Installation.

NO>>

Repair the A/C amp. accessory power supply circuit.

A/c Switch Assembly

Diagnosis Procedure

Diagnosis Procedure

CHECK FUSE

Ignition switch OFF.

Check that the following fuse is not blown (open):

Component	Location	Fuse No.	Capacity
A/C switch assembly	Fuse block (J/B)	6	10 A

Is the fuse blown (open)?

YES >>

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

NO >>

GO TO 2.

CHECK A/C SWITCH ASSEMBLY POWER SUPPLY

Disconnect A/C switch assembly connector.
Ignition switch ON.

Check voltage between A/C switch assembly harness connector and ground.

+	−	Voltage (Approx.)
M59	5	Ground	Battery voltage

−

Voltage

(Approx.)

A/C switch assembly

Connector

Terminal

M59

Ground

Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector between A/C switch assembly and fuse.

CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT FOR OPEN

Ignition switch OFF.

Check continuity between A/C switch assembly harness connector and ground.

A/C switch assembly		—	Continuity
Connector	Terminal	—	Continuity
M59	7	Ground	Yes

Is the inspection result normal?

YES >>

Replace A/C switch assembly. Refer to Removal and Installation.

NO >>

Repair harness or connector.

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