Nissan Pathfinder (2011 year). Manual - part 448

 

  Index      Manuals     Nissan Pathfinder (2011 year) - Service and Repair Manual

 

Search            copyright infringement  

 

 

 

 

 

 

 

 

Content      ..     446      447      448      449     ..

 

 

Nissan Pathfinder (2011 year). Manual - part 448

 

 

BLOWER MOTOR CONTROL SYSTEM

HAC-47

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Check continuity between terminals 6-7 and 3-5 by supplying 12

volts to terminal 1 and ground to terminal 2 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.

Rear Blower Motor Description

INFOID:0000000006243647

SYSTEM DESCRIPTION

Component Parts

Rear blower speed control system components are:

• A/C auto amp.

• A/C and AV switch assembly

• Rear air control (front)

• Rear air control (rear)

• Variable blower control (rear)

• Rear blower motor

• Rear blower motor relay

LJIA0068E

WJIA1508E

2011 Pathfinder

HAC-48

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

System Operation

Rear Blower Control

When the rear blower control dial (front) REAR CTRL switch is pressed (indicator on), it allows the rear air

control (rear) to control the rear blower motor speed. If the REAR CTRL switch is off (indicator off), the rear air

control (front) controls the rear blower motor speed regardless of the rear air control (rear) position.

Rear Blower Motor Component Function Check

INFOID:0000000006243648

SYMPTOM:

• Rear blower motor does not operate from the rear air control (front) and the rear air control (rear).

• Rear blower motor operates from rear air control (front) only.

• Rear blower motor operates from rear air control (rear) only.

• Rear blower motor speed does not match the rear air control (front) speed selected.

• Rear blower motor speed does not match the rear air control (rear) speed selected.

• Rear blower motor operates in high all the time when controlled from the rear air control (front).

• Rear blower motor operates in high all the time when controlled from the rear air control (rear).

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (FRONT)

1. Press AUTO switch.

2. Turn the rear air control (front) blower control dial to the lowest speed and check for rear blower operation

(REAR CTRL indicator off).

3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (REAR)

1. Press the REAR CTRL switch (indicator on) on the rear air control (front) to send control of the rear blower

motor back the rear air control (rear).

2. Turn the rear air control (rear) blower control dial to the lowest speed and check for rear blower operation.

3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?

YES

>> • Rear blower motor does not operate at any speed from the rear air control (front). Refer to 

HAC-

49, "Rear Air Control (Front) Diagnosis Procedure #1"

.

• Rear blower motor operates in high speed all the time or does not match the rear air control

(front) speed selected. Refer to 

HAC-50, "Rear Air Control (Rear) Diagnosis Procedure #2"

.

NO

>> • Rear blower motor does not operate from the rear air control (front) and the rear air control

(rear). Refer to 

HAC-51, "Rear Air Control (Rear) Diagnosis Procedure #3"

3.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (REAR)

AWIIA0181GB

2011 Pathfinder

BLOWER MOTOR CONTROL SYSTEM

HAC-49

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Press the REAR CTRL switch (indicator on) on the rear air control (front) to send control of the rear blower

motor back the rear air control (rear).

2. Turn the rear air control (rear) blower control dial to the lowest speed and check for rear blower operation.

3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?

YES

>> GO TO 4.

NO

>> Check rear air control (rear). Refer to 

HAC-54, "Rear Air Control (Rear) Diagnosis Procedure #4"

.

4.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 5.

5.

RECHECK FOR ANY SYMPTOMS 

Perform a complete operational check for any symptoms. Refer to 

HAC-5, "Operational Check (Front)"

.

Does another symptom exist?

YES

>> Refer to 

HAC-4, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

. 

NO

>> Inspection End.

Rear Air Control (Front) Diagnosis Procedure #1

INFOID:0000000006243649

Regarding Wiring Diagram information, refer to 

HAC-95, "Wiring Diagram - Automatic"

.

TROUBLE DIAGNOSIS PROCEDURE

1.

CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY

1. Disconnect rear air control (front) harness connector.

2. Turn ignition switch ON.

3. Check voltage between rear air control (front) harness connec-

tor R2 terminal 10 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK REAR AIR CONTROL (FRONT) FRONT AUX BLOWER POT REFERENCE VOLTAGE

1. Disconnect rear air control (front) harness connector.

2. Turn ignition switch ON.

3. Check voltage between rear air control (front) harness connec-

tor R2 terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK REAR AIR CONTROL (FRONT) GROUND CIRCUIT

Battery voltage should exist.

AWIIA0253ZZ

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

Rear air control (front): R2

6

Ground

5V

AWIIA0252ZZ

2011 Pathfinder

HAC-50

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

Check continuity between rear air control (front) harness connector

R2 terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair harness or connector.

Rear Air Control (Rear) Diagnosis Procedure #2

INFOID:0000000006243650

Regarding Wiring Diagram information, refer to 

HAC-95, "Wiring Diagram - Automatic"

.

TROUBLE DIAGNOSIS PROCEDURE 

1.

CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY

1. Disconnect rear air control (front) harness connector.

2. Turn ignition switch ON.

3. Check voltage between rear air control (front) harness connec-

tor R2 terminal 10 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK REAR AIR CONTROL (FRONT) FRONT AUX BLOWER POT REFERENCE VOLTAGE

1. Disconnect rear air control (front) harness connector.

2. Check voltage between rear air control (front) harness connec-

tor R2 terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK REAR AIR CONTROL (FRONT) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between rear air control (front) harness con-

nector R2 terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace rear air control (front). Refer to 

VTL-7,

"Removal and Installation"

.

NO

>> Repair harness or connector.

4.

CHECK REAR AIR CONTROL (FRONT) BLOWER POT CIRCUIT FOR OPEN

Continuity should exist.

AWIIA0254ZZ

Battery voltage should exist.

AWIIA0253ZZ

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

Rear air control (front): R2

6

Ground

5V

AWIIA0252ZZ

Continuity should exist.

AWIIA0254ZZ

2011 Pathfinder

BLOWER MOTOR CONTROL SYSTEM

HAC-51

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between A/C auto amp. harness connector

M50 (A) terminal 38 and rear air control (front) harness connec-

tor R2 (B) terminal 6.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair harness or connector.

Rear Air Control (Rear) Diagnosis Procedure #3

INFOID:0000000006243651

Regarding Wiring Diagram information, refer to 

HAC-95, "Wiring Diagram - Automatic"

.

TROUBLE DIAGNOSIS PROCEDURE

1.

CHECK REAR AIR CONTROL (FRONT)

1. Disconnect rear air control (front) connector.

2. Turn ignition switch ON.

3. Press AUTO switch.
Does rear blower motor operate in high speed?

YES

>> GO TO 17.

NO

>> GO TO 2.

2.

CHECK REAR BLOWER MOTOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect rear blower motor harness connector.

3. Turn ignition switch ON.

4. Press AUTO switch.

5. Rotate rear air control (front) blower speed control dial to maxi-

mum speed (REAR CTRL indicator off).

6. Check voltage between rear blower motor harness connector

B501 terminal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 9.

3.

CHECK VARIABLE BLOWER CONTROL (REAR) POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect variable blower control (rear) connector.

3. Turn ignition switch ON.

4. Check voltage between variable blower control connector B133

terminal 4 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK VARIABLE BLOWER CONTROL (REAR) AUX BLOWER SPEED SIGNAL CIRCUIT FOR SHORT

Continuity should exist.

AWIIA0244ZZ

Battery voltage should exist.

AWIIA0255ZZ

Battery voltage should exist.

AWIIA1296ZZ

2011 Pathfinder

HAC-52

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

Check voltage between variable blower control (rear) harness con-

nector B133 terminal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 8.

5.

CHECK VARIABLE BLOWER CONTROL (REAR) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between variable blower control (rear) harness

connector B133 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK REAR BLOWER MOTOR

Check rear blower motor. Refer to 

HAC-55, "Rear Blower Motor And Relay Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace rear blower motor. Refer to 

VTL-12, "Removal and Installation"

.

7.

CHECK VARIABLE BLOWER CONTROL (REAR) BLOWER MOTOR GROUND CIRCUIT

Check continuity between rear blower motor connector B501 (B) ter-

minal 1 and variable blower control (rear) connector B133 (A) termi-

nal 2.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair harness or connector.

8.

CHECK VARIABLE BLOWER CONTROL (REAR) AUX BLOWER SPEED CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between A/C auto amp. harness connector

M49 (A) terminal 12 and variable blower control (rear) harness

connector B133 (B) terminal 3.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair harness or connector.

9.

CHECK FUSES

Check 15A fuses [Nos. 10 and 11, located in the fuse block (J/B)].

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

Variable blower control: B133

3

Ground

4.5 V

AWIIA1297ZZ

Continuity should exist.

AWIIA1298ZZ

Continuity should exist.

AWIIA1299ZZ

Continuity should exist.

AWIIA1300ZZ

2011 Pathfinder

BLOWER MOTOR CONTROL SYSTEM

HAC-53

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 14.

10.

CHECK REAR BLOWER MOTOR RELAY

Check rear blower motor relay. Refer to 

HAC-55, "Rear Blower Motor And Relay Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 11. 

NO

>> Replace rear blower motor relay.

11.

CHECK REAR BLOWER MOTOR CIRCUIT BETWEEN REAR BLOWER MOTOR AND FUSE BLOCK (J/

B)

1. Turn ignition switch OFF.

2. Disconnect fuse block (J/B) M3 harness connector.

3. Check continuity between fuse block (J/B) harness connector

M3 (A) terminal 3N and 8N and rear blower motor harness con-

nector B501 (B) terminal 2.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Repair harness or connector.

12.

CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT

Check continuity between fuse block (J/B) harness connector M3

terminal 7N and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair harness or connector.

13.

CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT FOR OPEN

1. Turn ignition switch ON.

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

nector J-1 terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace fuse block (J/B). 

NO

>> Repair harness or connector.

14.

REPLACE FUSE

1. Turn ignition switch OFF.

2. Replace fuses.

3. Reconnect all disconnected parts.

4. Turn ignition switch ON.

5. Activate the rear blower motor from the rear air control (front).
Does the fuse blow?

YES

>> GO TO 15.

Continuity should exist.

AWIIA0250ZZ

Continuity should exist.

LJIA0102E

Battery voltage should exist.

AWIIA1192ZZ

2011 Pathfinder

HAC-54

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

NO

>> Inspection End.

15.

CHECK REAR BLOWER MOTOR

Check rear blower motor. Refer to 

HAC-55, "Rear Blower Motor And Relay Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace rear blower motor. Refer to 

VTL-12, "Removal and Installation"

.

16.

CHECK REAR BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT

1. Turn ignition switch OFF.

2. Disconnect fuse block (J/B) M3 harness connector and variable

blower control (rear).

3. Check continuity between rear blower motor harness connector

B501 terminal 2 and ground.

Is the inspection result normal?

YES

>> Replace variable blower control (rear). Refer to 

VTL-14,

"Removal and Installation"

.

NO

>> Repair harness or connector.

17.

CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY

Check voltage between rear air control (front) harness connector R2

terminal 10 and ground.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair harness or connector.

18.

CHECK A/C AUTO AMP. FRONT AUX BLOWER POT CIRCUIT FOR SHORT

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. harness connector M50.

3. Check continuity between rear air control (front) harness con-

nector R2 terminal 6 and ground.

Is the inspection result normal?

YES

>> Replace rear air control (front) Refer to 

VTL-7,

"Removal and Installation"

.

NO

>> Repair harness or connector.

Rear Air Control (Rear) Diagnosis Procedure #4

INFOID:0000000006243652

Regarding Wiring Diagram information, refer to 

HAC-95, "Wiring Diagram - Automatic"

.

TROUBLE DIAGNOSIS PROCEDURE

1.

CHECK REAR AIR CONTROL (REAR) REAR AUX BLOWER POT REFERENCE VOLTAGE

1. Turn ignition switch OFF.

Continuity should not exist.

AWIIA0251ZZ

Battery voltage should exist.

AWIIA0253ZZ

Continuity should not exist.

AWIIA0913ZZ

2011 Pathfinder

 

 

 

 

 

 

 

Content      ..     446      447      448      449     ..