Nissan Pathfinder (2011 year). Manual - part 461

INTAKE DOOR MOTOR

HAC-151

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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2. Turn mode dial to vent mode (

).

3. Press REC (

) switch. 

4. Press REC (

) switch again.

5. Listen for intake door position change (you should hear blower sound change slightly).
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-151, "Intake Door Motor Diagnosis Procedure"

.

Intake Door Motor Diagnosis Procedure

INFOID:0000000006243713

Regarding Wiring Diagram information, refer to 

HAC-172, "Wiring Diagram - Manual"

.

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR

1.

CHECK INTAKE DOOR MOTOR CIRCUIT VOLTAGE

1. Turn ignition switch OFF.

2. Disconnect intake door motor connector.

3. Turn ignition switch ON.

4. Rotate the temperature control dial counterclockwise.

5. Check voltage between intake door motor harness connector

M58 terminal 6 and ground.

Is inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK INTAKE DOOR MOTOR CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Check continuity between front air control harness connector

M52 (A) terminal 5 and intake door motor harness connector

M58 (B) terminal 6.

Is inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

3.

CHECK INTAKE DOOR MOTOR CIRCUIT VOLTAGE

1. Rotate the temperature control dial clockwise.

2. Check voltage between intake door motor harness connector

M58 terminal 1 and ground.

Is inspection result normal?

YES

>> Replace intake door motor. Refer to 

VTL-26, "Removal

and Installation"

.

NO

>> GO TO 4.

4.

CHECK INTAKE DOOR MOTOR CIRCUIT FOR OPEN

6 - Ground

: Battery voltage

AWIIA0853ZZ

5 - 6

: Continuity should exist.

AWIIA0854ZZ

1 - Ground

:Battery voltage

AWIIA0848ZZ

2011 Pathfinder

HAC-152

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INTAKE DOOR MOTOR

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Check continuity between front air control harness connector

M52 (A) terminal 4 and intake door motor harness connector

M58 (B) terminal 1.

Is inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-7, "Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

A

B

Connector

Terminal Connector

Terminal 

Continuity

Front air control: 

M52

4 

Intake door motor: 

M58

1

Yes

AWIIA0855ZZ

2011 Pathfinder

BLOWER MOTOR

HAC-153

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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BLOWER MOTOR

System Description

INFOID:0000000006243714

Component Parts

Blower speed control system components are:

• Front air control

• Front blower motor resistor

• Front blower motor

• Front blower relay

System Operation

COMPONENT DESCRIPTION

Blower Motor Resistor

The front blower motor resistor (1) is located on the heater and cool-

ing unit assembly. The front blower motor resistor grounds the front

blower motor through a series of 1, 2, or 3 resistors, depending upon

speed selected. For high speed operation the front blower motor

resistor is circumvented and the front blower motor grounds directly

(

⇒

: Front).

Front Blower Motor Component Function Check

INFOID:0000000006243715

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - FRONT BLOWER

1. Rotate the blower control dial clockwise. Blower should operate.

2. Rotate the blower control dial clockwise, and continue checking blower speed until all speeds are

checked.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-154, "Front Blower Motor Diagnosis Procedure"

.

AWIIA0272GB

AWIIA1196ZZ

2011 Pathfinder

HAC-154

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

BLOWER MOTOR

Front Blower Motor Diagnosis Procedure

INFOID:0000000006243716

Regarding Wiring Diagram information, refer to 

HAC-172, "Wiring Diagram - Manual"

.

SYMPTOM: Blower motor operation is malfunctioning under starting

blower speed control.

1.

DIAGNOSTIC PROCEDURE

1. Turn ignition switch ON.

2. Turn the front blower switch to each of its four speeds.

Does blower motor rotate normally at each speed?

YES or NO

YES

>> Inspection End.

NO

>> 1. Does not rotate at any speed, GO TO 2.

2. Does not rotate at 1 - 3 speed, GO TO 13.

3. Does not rotate at 4 speed, GO TO 16.

2.

CHECK FUSES

1. Check 15A fuses (Nos. 24 and 27, located in the fuse and fusible link box). Refer to 

PG-73, "Terminal

Arrangement"

.

2. Check 10A fuse [No. 8, located in the fuse block (JB)]. Refer to 

PG-72, "Terminal Arrangement"

.

Is inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 8.

3.

CHECK FRONT BLOWER MOTOR POWER SUPPLY

WJIA1503E

2011 Pathfinder

BLOWER MOTOR

HAC-155

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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1. Turn ignition switch OFF.

2. Disconnect front blower motor harness connector.

3. Turn ignition switch ON.

4. Select any front blower speed except OFF.

5. Check voltage between front blower motor harness connector

M62 terminal 2 and ground.

Is inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 4.

4.

CHECK FRONT BLOWER MOTOR RELAY

1. Turn Ignition switch OFF.

2. Check front blower motor relay. Refer to 

HAC-157, "Front Blower Motor Component Inspection"

.

Is inspection result normal?

YES

>> GO TO 5.

NO

>> Replace front blower motor relay.

5.

CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY (SWITCH SIDE)

Check voltage between front blower motor relay harness connector

E54 terminals 7 and 5 and ground.

Is inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY (COIL SIDE)

1. Turn ignition switch ON.

2. Check voltage between front blower motor relay harness con-

nector E54 terminal 1 and ground.

Is inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace harness as necessary.

7.

CHECK FRONT BLOWER MOTOR POWER FROM RELAY TO FRONT BLOWER MOTOR

2 - Ground

: Battery voltage

WJIA1331E

A

Condition

Voltage (Ap-

prox.)

(+)

Front air control 

connector

Terminal 

(-)

M54

5 Ground

Blower motor 

relay power 

supply

Battery voltage

M54

7 Ground

Blower motor 

relay power 

supply

Battery voltage

WJIA1634E

A

Condition

Voltage (Ap-

prox.)

(+)

Front air control 

connector

Terminal 

(-)

M54

1 Ground

Blower motor 

relay power 

supply (coil 

side)

Battery voltage

WJIA0504E

2011 Pathfinder

HAC-156

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

BLOWER MOTOR

1. Turn ignition switch OFF.

2. Check continuity between front blower motor relay harness con-

nector E54 terminals 6 and 3 and front blower motor harness

connector M62 terminal 2.

Is inspection result normal?

YES

>> Repair open front blower motor relay ground circuit.

NO

>> Repair harness or connector between the front blower

motor relay and the front blower motor.

8.

REPLACE FUSE

Refer to 

PG-74, "Terminal Arrangement"

.

Does fuse No. 24 or 27 open when the front blower motor is turned on?
YES or NO

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

REPLACE FUSE

Refer to 

PG-74, "Terminal Arrangement"

.

Does fuse No. 8 open when the ignition switch is turned ON?
YES or NO

YES

>> Repair or replace harness as necessary.

NO

>> Inspection End.

10.

CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT

1. Turn ignition switch OFF.

2. Disconnect front blower motor connector.

3. Check continuity between front blower motor harness connector

M62 terminal 2 and ground.

Is inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace harness as necessary.

11.

CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT FOR SHORT

1. Disconnect front blower motor relay connector.

2. Check continuity between the front blower motor relay harness

connector E54 terminal 7 and terminal 5 and ground.

Is inspection result normal?

YES

>> Check front blower motor. Refer to 

HAC-154, "Front

Blower Motor Diagnosis Procedure"

.

NO

>> Repair harness or connector.

12.

CHECK FRONT BLOWER MOTOR

1. Turn ignition switch OFF.

2. Check front blower motor. Refer to 

HAC-157, "Front Blower Motor Component Inspection"

.

Is inspection result normal?

3, 6 - 2

: Continuity should exist.

WJIA1333E

2 - Ground

: Continuity should not exist.

WJIA0649E

7, 5 - Ground

: Continuity should not exist.

WJIA1334E

2011 Pathfinder

BLOWER MOTOR

HAC-157

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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YES

>> GO TO 13.

NO

>> Replace front blower motor. Refer to 

PG-74, "Terminal Arrangement"

.

13.

CHECK FRONT BLOWER MOTOR RESISTOR

Check front blower motor resistor. Refer to 

HAC-157, "Front Blower Motor Component Inspection"

.

Is inspection result normal?

YES

>> GO TO 14.

NO

>> Replace front blower motor resistor. Refer to 

VTL-16, "Removal and Installation"

.

14.

CHECK FRONT BLOWER SWITCH

Check front blower switch. Refer to 

HAC-157, "Front Blower Motor Component Inspection"

.

Is inspection result normal?

YES

>> GO TO 15.

NO

>> Replace front blower switch. Refer to 

VTL-7, "Removal and Installation"

.

15.

CHECK FRONT BLOWER MOTOR GROUND CIRCUIT TO FRONT BLOWER MOTOR RESISTOR

1. Disconnect front blower motor resistor harness connector.

2. Check continuity between front blower motor connector M62 (A)

terminal 1 and front blower motor resistor harness connector

M121 (B) terminal 3.

Is inspection result normal?

YES

>> Repair harness or connector between front blower

switch connector M51 terminal 8 and ground.

NO

>> Repair harness or connector between front blower motor resistor and front blower motor.

16.

CHECK FRONT BLOWER SWITCH

Check front blower switch. Refer to 

HAC-157, "Front Blower Motor Component Inspection"

.

Is inspection result normal?

YES

>> Repair harness or connector between front blower motor switch connector M51 terminal 8 and

front blower motor resistor connector M121 terminal 3.

NO

>> Replace front blower switch. Refer to 

VTL-7, "Removal and Installation"

.

Front Blower Motor Component Inspection

INFOID:0000000006243717

COMPONENT INSPECTION

Front Blower Motor Relay

A

B

Connector

Terminal Connector

Terminal 

Continuity

Front blower motor: 

M62

1 

Front blower mo-

tor resistor: M121

3

Yes

WJIA1676E

2011 Pathfinder

HAC-158

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

BLOWER MOTOR

Check continuity between terminals by supplying 12 volts and

ground to coil side terminals of relay.

Front Blower Motor

Confirm smooth rotation of the blower motor.

• Ensure that there are no foreign particles inside the blower unit.

• Apply 12 volts to terminal 2 and ground to terminal 1 and verify that

the motor operates freely and quietly.

Front Blower Switch

Check continuity between the terminals at each front blower switch

position.

Blower Motor Resistor

LJIA0068E

WJIA1508E

WJIA0508E

2011 Pathfinder