Nissan Versa

 Sedan Service Manual

Ventilation, heater & air conditioner » Heater & air conditioning control system (HAC) » Front blower motor
Diagnosis Procedure

Regarding Wiring Diagram information, refer to HAC "Wiring Diagram" or HAC "Wiring Diagram".

1.CHECK SYMPTOM

Check symptom (A or B).                                               

Which symptom is detected?

A >>GO TO 2.

B >>GO TO 7.

2.CHECK FUSE

1. Turn ignition switch OFF.
2. Check 15A fuses (Nos. 20 and 22, located in fuse block (J/B)].

NOTE: Refer to PG "Terminal Arrangement".

Is the inspection result normal?

YES >> GO TO 3.

NO >> Replace the blown fuse after repairing the affected circuit.

3.CHECK FRONT BLOWER MOTOR POWER SUPPLY

1. Disconnect front blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between front blower motor harness connector and ground. 

Is the inspection result normal?

YES >> GO TO 5.

NO >> GO TO 4.

4.CHECK BLOWER RELAY

1. Turn ignition switch OFF.
2. Check blower relay. Refer to HAC "Component Inspection (Blower Relay)".

Is the inspection result normal?

YES >> Repair harness or connector between front blower motor and fuse.

NO >> Replace blower relay.

5.CHECK FAN SWITCH GROUND CIRCUIT FOR OPEN

1. Turn ignition switch OFF
2. Disconnect front air control connector.
3. Check continuity between front air control harness connector and ground.

Is the inspection result normal?

YES >> GO TO 6.

NO >> Repair harness or connector.

6.CHECK FAN SWITCH 4TH POSITION CIRCUIT FOR OPEN

Check continuity between front air control harness connector and front blower motor harness connector.

Is the inspection result normal?

YES >> GO TO 10.

NO >> Repair the harness or connector.

7.CHECK FRONT BLOWER MOTOR RESISTOR POWER SUPPLY

1. Turn ignition switch OFF.
2. Disconnect front blower motor resistor connector.
3. Turn ignition switch ON.
4. Check voltage between front blower motor resistor harness connector and ground. 

Is the inspection result normal?

YES >> GO TO 8.

NO >> Repair harness or connector between front blower motor resistor and front blower motor.

8.CHECK FAN SWITCH 1ST, 2ND, AND 3RD POSITION CIRCUIT FOR OPEN

1. Turn ignition switch OFF.
2. Disconnect front air control.
3. Check continuity between front air control harness connector and front blower motor resistor. 

Is the inspection result normal?

YES >> GO TO 9.

NO >> Repair harness or connector.

9.CHECK FRONT BLOWER MOTOR RESISTOR

Check front blower motor resistor. Refer to HAC "Component Inspection (Front Blower Motor Resistor)".

Is the inspection result normal?

YES >> GO TO 10.

NO >> Replace front blower motor resistor. Refer to HAC "Removal and Installation".

10.CHECK FAN SWITCH

Check fan switch. Refer to HAC "Component Inspection (Fan Switch)".

Is the inspection result normal?

YES >> Replace front blower motor. Refer to VTL "Removal and Installation".

NO >> Replace front air control. Refer to HAC "Removal and Installation".

Component Inspection (Front Blower Motor)

1.CHECK FRONT BLOWER MOTOR

1. Connect battery voltage to terminal 1 of front blower motor.
2. Connect ground to terminal 2 of front blower motor.

Does the front blower motor operate?

YES >> Intermittent incident. Refer to GI"Intermittent Incident".

NO >> Replace front blower motor. Refer to VTL "Removal and Installation".

Diagnosis Procedure

Component Inspection (Blower Relay)