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Nissan Pathfinder (2010 year). Manual - part 458

HAC-140

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

AIR MIX DOOR MOTOR

The air mix door motor (1) is attached to the front heater and cooling

unit assembly. This motor rotates so that the air mix door is opened

or closed to a position set by the front air control. Motor rotation is

then conveyed through a shaft and the air mix door position is then

fed back to the front air control by the PBR built into the air mix door

motor (

⇒

: Front).

↓

Air Mix Door Motor Component Function Check

INFOID:0000000005256993

INSPECTION FLOW

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1. Blower must be on (1, 2, 3, 4).

2. Turn the temperature control dial clockwise to maximum heat.

3. Check for hot air at discharge air outlets.

>> GO TO 2.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE

1. Turn the temperature control dial counterclockwise to maximum cold.

2. Check for cold air at discharge air outlets.
Can a symptom be duplicated?

YES

>> Inspection End.

>> Go to diagnosis procedure. Refer to

HAC-140, "Air Mix Door Motor Diagnosis Procedure"

Air Mix Door Motor Diagnosis Procedure

INFOID:0000000005256994

Regarding Wiring Diagram information, refer to

HAC-165, "Wiring Diagram"

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR

CHECK POWER SUPPLY CIRCUITS FOR AIR MIX DOOR MOTOR

1. Turn ignition switch OFF.

2. Disconnect front air control connector and air mix door motor

connector.

3. Check continuity between front air control harness connector

M52 terminal 2 and 3 and air mix door motor harness connector

M149 terminal 6 and 5.

Is inspection result normal?

YES

>> GO TO 2.

>> Repair or replace harness as necessary.

CHECK PBR REFERENCE SIGNAL VOLTAGE

AWIIA1195ZZ

2 - 6

: Continuity should exist.

3 - 5

: Continuity should exist.

WJIA1318E

2010 Pathfinder

AIR MIX DOOR MOTOR

HAC-141

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

HAC

1. Reconnect the front air control connector.

2. Turn ignition switch ON.

3. Check voltage between air mix door motor harness connector

M149 terminal 1 and ground.

Is inspection result normal?

YES

>> GO TO 4.

>> GO TO 3.

CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR AND FRONT AIR

CONTROL

1. Turn ignition switch OFF.

2. Disconnect the front air control connector.

3. Check continuity between air mix door motor harness connector

M149 (B) terminal 1 and front air control harness connector M52

(A) terminal 23.

Is inspection result normal?

YES

>> Replace front air control. Refer to

VTL-7, "Removal and Installation"

>> Repair or replace harness as necessary.

CHECK PBR GROUND REFERENCE CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect the front air control connector.

3. Check continuity between air mix door motor harness connector

M149 terminal 3 and front air control harness connector M52 ter-

minal 26.

Is inspection result normal?

YES

>> GO TO 5.

>> Repair or replace harness as necessary.

CHECK PBR FEEDBACK SIGNAL

1. Reconnect the front air control connector and air mix door motor

connector.

2. Turn ignition switch ON.

3. Check voltage between front air control harness connector M52

terminal 22 and ground.

4. Rotate temperature control dial through complete range.

Is inspection result normal?

YES

>> Replace front air control. Refer to

VTL-7, "Removal and

Installation"

>> GO TO 6.

CHECK PBR FEEDBACK CIRCUIT

1 - Ground

: Approx. 5V

WJIA1319E

Connector

Terminal Connector

Terminal

Continuity

Front air control:

M52

Air mix door motor

: M143

Yes

WJIA1656E

3 - 26

: Continuity should exist.

WJIA1320E

22 - Ground

: Approx. 0V - 5V

WJIA1096E

2010 Pathfinder

HAC-142

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

AIR MIX DOOR MOTOR

1. Turn ignition switch OFF.

2. Disconnect the air mix door motor connector and front air control

connector.

3. Check continuity between air mix door motor harness connector

M149 terminal 2 and front air control harness connector M52 ter-

minal 22.

Is inspection result normal?

YES

>> Replace air mix door motor. Refer to

VTL-30, "Removal

and Installation"

>> Repair or replace harness as necessary.

2 - 22

: Continuity should exist.

WJIA1321E

2010 Pathfinder

INTAKE DOOR MOTOR

HAC-143

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

HAC

INTAKE DOOR MOTOR

System Description

INFOID:0000000005256995

SYSTEM DESCRIPTION

Component Parts

Intake door control system components are:

• Front air control

• Intake door motor

• Intake sensor

System Operation

The intake door control determines the intake door position based on the position of the recirculation switch.

When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and

recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the

opposite direction, again allowing fresh air into the cabin.

COMPONENT DESCRIPTION

Intake door motor

The intake door motor is attached to the intake unit. It rotates so that

air is drawn from inlets set by the front air control. Motor rotation is

conveyed to a lever which activates the intake door.

Intake Door Motor Component Function Check

INFOID:0000000005256996

SYMPTOM:

• Intake door does not change.

• Intake door motor does not operate normally.

INSPECTION FLOW

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (

)

1. Turn blower control dial to 4.

WJIA1478E

WJIA1486E

2010 Pathfinder

HAC-144

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INTAKE DOOR MOTOR

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).
Can a symptom be duplicated?

YES

>> Inspection End.

>> Go to diagnosis procedure. Refer to

HAC-144, "Intake Door Motor Diagnosis Procedure"

Intake Door Motor Diagnosis Procedure

INFOID:0000000005256997

Regarding Wiring Diagram information, refer to

HAC-165, "Wiring Diagram"

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR

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.

>> GO TO 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"

>> Repair or replace harness as necessary.

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-27, "Removal

and Installation"

>> GO TO 4.

CHECK INTAKE DOOR MOTOR CIRCUIT FOR OPEN

6 - Ground

: Battery voltage

AWIIA0853ZZ

5 - 6

: Continuity should exist.

AWIIA0854ZZ

1 - Ground

:Battery voltage

AWIIA0848ZZ

2010 Pathfinder

INTAKE DOOR MOTOR

HAC-145

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

HAC

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"

>> Repair or replace harness as necessary.

Connector

Terminal Connector

Terminal

Continuity

Front air control:

M52

Intake door motor:

M58

Yes

AWIIA0855ZZ

2010 Pathfinder

HAC-146

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

BLOWER MOTOR

BLOWER MOTOR

System Description

INFOID:0000000005256998

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:0000000005256999

INSPECTION FLOW

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.

Can the symptom be duplicated?

YES

>> Inspection End.

>> Go to diagnosis procedure. Refer to

HAC-147, "Front Blower Motor Diagnosis Procedure"

AWIIA0272GB

AWIIA1196ZZ

2010 Pathfinder

BLOWER MOTOR

HAC-147

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

HAC

Front Blower Motor Diagnosis Procedure

INFOID:0000000005257000

Regarding Wiring Diagram information, refer to

HAC-165, "Wiring Diagram"

SYMPTOM: Blower motor operation is malfunctioning under starting

blower speed control.

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.

>> 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.

CHECK FUSES

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

PG-74, "Terminal

Arrangement"

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

PG-73, "Terminal Arrangement"

Is inspection result normal?

YES

>> GO TO 3.

>> GO TO 8.

CHECK FRONT BLOWER MOTOR POWER SUPPLY

WJIA1503E

2010 Pathfinder

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