Nissan Pathfinder (2010 year). Manual - part 447

HAC-52

< COMPONENT 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:0000000005256934

Regarding Wiring Diagram information, refer to 

HAC-90, "Wiring Diagram"

.

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

2010 Pathfinder

BLOWER MOTOR CONTROL SYSTEM

HAC-53

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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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:0000000005256935

Regarding Wiring Diagram information, refer to 

HAC-90, "Wiring Diagram"

.

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

2010 Pathfinder

HAC-54

< COMPONENT 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-57, "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

2010 Pathfinder

BLOWER MOTOR CONTROL SYSTEM

HAC-55

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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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-57, "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

2010 Pathfinder

HAC-56

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

NO

>> Inspection End.

15.

CHECK REAR BLOWER MOTOR

Check rear blower motor. Refer to 

HAC-57, "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:0000000005256936

Regarding Wiring Diagram information, refer to 

HAC-90, "Wiring Diagram"

.

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

2010 Pathfinder

BLOWER MOTOR CONTROL SYSTEM

HAC-57

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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2. Disconnect rear air control (rear) harness connector.

3. Turn ignition switch ON.

4. Check voltage between rear air control (rear) harness connector

M208 terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK REAR AIR CONTROL (REAR) GROUND CIRCUIT

1. Turn ignition switch OFF.

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

tor M208 terminal 1 and ground.

Is the inspection result normal?

YES

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

VTL-7,

"Removal and Installation"

.

NO

>> Repair harness or connector.

3.

CHECK REAR AIR CONTROL (REAR) REAR AUX BLOWER POT FOR SHORT

1. Turn ignition switch OFF.

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

tor M208 terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK REAR AIR CONTROL (REAR) REAR AUX BLOWER POT BETWEEN A/C AUTO AMP. AND REAR

AIR CONTROL REAR

1. Disconnect A/C auto amp. harness connector.

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

M50 (A) terminal 52 and rear air control (rear) harness connec-

tor M208 (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 Blower Motor And Relay Component Inspection

INFOID:0000000005256937

COMPONENT INSPECTION

Rear Blower Motor Relay

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

Rear air control (rear): M208

6 

Ground

5V

AWIIA0252ZZ

Continuity should exist.

AWIIA0254ZZ

Continuity should not exist.

AWIIA0913ZZ

Continuity should exist.

AWIIA0256ZZ

2010 Pathfinder

HAC-58

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

Check circuit continuity between terminals by supplying 12 volts and

ground to coil side terminals of relays.

Rear Blower Motor

Check that there are no foreign particles inside the intake unit.

Apply 12 volts to terminal 2 and ground to terminal 1 and ensure that

the blower motor rotates freely and quietly.

WJIA0973E

LJIA0115E

2010 Pathfinder

REAR AIR CONTROL SYSTEM

HAC-59

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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REAR AIR CONTROL SYSTEM

Rear Air Control System Description

INFOID:0000000005256938

SYSTEM DESCRIPTION

Component Parts

Rear air control system components are:

• A/C auto amp.

• Rear air control (front)

• Rear air control (rear)

• Air mix door motor (rear)

System Operation

Rear Air Control

When the REAR CTRL indicator is off the rear air control (front) will control all rear blower motor speeds and

the rear temperature/mode operations. When the REAR CTRL switch is pressed (indicator on), the rear air

control (rear) will control all the rear blower motor speeds and the rear temperature/mode operations.

Rear Air Control Component Function Check

INFOID:0000000005256939

SYMPTOM:

• Temperature cannot be adjusted from the rear air control.

INSPECTION FLOW

1.

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

1. Press AUTO switch (rear air controls only operate when front blower is on).

2. Turn the rear blower motor to maximum speed from the rear air control (front).

3. Turn rear air control (front) temperature/mode control dial clockwise and then counterclockwise (REAR

CTRL indicator off).

4. Check for hot air at rear floor discharge air outlets in the maximum heat position and cold air at rear roof

discharge air outlets in the maximum cold position.

 Does the rear air control (front) operate properly?

YES

>> GO TO 2.

NO

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

HAC-60, "Rear Air Control (Front) Diagnosis Procedure"

.

2.

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

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

2. Turn the rear blower motor to maximum speed from the rear air control (rear).

3. Turn rear air control (rear) temperature/mode control dial slowly clockwise and then counterclockwise

(REAR CTRL indicator on).

WJIA2102E

2010 Pathfinder