Nissan Xterra. Manual - part 456

 

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Nissan Xterra. Manual - part 456

 

 

HAC-22

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

AIR MIX DOOR MOTOR

The air mix door motor is attached to the 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.

Air Mix Door Motor Component Function Check

INFOID:0000000009482472

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1. Blower must be ON.

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

3. Check for hot air at discharge air outlets.

>> GO TO 2.

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.
Is the inspection results normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-22, "Air Mix Door Motor Diagnosis Procedure"

.

Air Mix Door Motor Diagnosis Procedure

INFOID:0000000009482473

Regarding Wiring Diagram information, refer to 

HAC-45, "Wiring Diagram"

.

SYMPTOM:

• Discharge air temperature does not change.

• Air mix door motor does not operate.

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR

1.

CHECK AIR MIX DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND 

1. Turn ignition switch OFF.

2. Disconnect the front air control harness connector M50 and the air mix door motor harness connector

M147.

3. Check continuity between front air control harness connector M50 terminals 17, 18 and the air mix door

motor harness connector M147 terminals 5, 6.

WJIA1636E

Connector

Terminal

Connector

Terminal

Continuity

M50

18

M147

6

Yes

17

5

AIR MIX DOOR MOTOR

HAC-23

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

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HAC

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4. Check continuity between front air control harness connector

M50 terminals 17, 18 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness as necessary.

2.

CHECK FRONT AIR CONTROL FOR AIR MIX DOOR MOTOR POWER AND GROUND 

1. Reconnect front air control harness connector.

2. Turn ignition switch ON.
3. Press the mode switch D/F (

) mode. 

4. Check voltage between front air control harness connector M50

terminal 17 and terminal 18 while pressing the mode switch to
VENT (

), and then to B/L (

) mode. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace front air control. Refer to 

VTL-19, "Removal and Installation"

.

3.

CHECK AIR MIX DOOR MOTOR PBR CIRCUITS FOR OPEN AND SHORT TO GROUND 

1. Turn ignition switch OFF.

2. Disconnect the front air control harness connectors M50 and M2.

3. Check continuity between front air control harness connectors M50 terminal 3 and M2 terminal 28, and

the air mix door motor harness connector M147 terminals 1, 3.

4. Check continuity between front air control harness connectors M50 terminal 3 and M2 terminal 28, and

ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness as necessary.

4.

CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND 

1. Check continuity between front air control harness connector M50 terminal 6 and air mix door motor har-

ness connector M147 terminal 2.

Connector

Terminal

—

Continuity

M50

17

Ground

No

18

AWIIA0374ZZ

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M50

18

17

Pressing the mode switch from D/F 

(

) mode to VENT (

) mode

Battery voltage

17

18

Pressing the mode switch from VENT 

(

)  mode  to  B/L  (

)  mode

Battery voltage

AWIIA0373ZZ

Connector

Terminal

Connector

Terminal

Continuity

M50

3

M147

3

Yes

M2

28

1

Connector

Terminal

—

Continuity

M50

3

Ground

No

M2

28

HAC-24

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

AIR MIX DOOR MOTOR

2. Check continuity between front air control harness connector

M50 terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness as necessary.

5.

CHECK FRONT AIR CONTROL FOR 5 VOLT REFERENCE (VREF), VREF RETURN, AND FEEDBACK

SIGNAL 
1. Reconnect front air control harness connectors.

2. Turn ignition switch ON.

3. Check voltage between front air control harness connector M50 terminal 3 and M2 terminal 28.

4. Check voltage between front air control harness connector M50

terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace front air control. Refer to 

VTL-19, "Removal

and Installation"

.

6.

CHECK FRONT AIR CONTROL FOR FEEDBACK SIGNAL 

1. Reconnect the air mix door motor harness connector M147.

2. Check voltage between front air control harness connector M50

terminal 6 and ground.

Is the inspection result normal?

YES

>> Inspect air mix door for binding or mechanical failure. If

air mix door moves freely, replace front air control. Refer

to 

VTL-19, "Removal and Installation"

.

NO

>> Replace the air mix door motor. Refer to 

VTL-20,

"Removal and Installation"

.

Connector

Terminal

Connector

Terminal

Continuity

M50

6

M147

2

Yes

Connector

Terminal

—

Continuity

M50

6

Ground

No

AWIIA0383ZZ

Connector

Terminal

Connector

Terminal

Voltage (Approx.)

(+)

(-) 

M2

28

M50

3

5V

Connector

Terminal

—

Voltage (Approx.)

M50

6

Ground

0V

AWIIA0382ZZ

Connector

Terminal

—

Voltage (Approx.)

M50

6

Ground

0.2V to 4.8V

AWIIA0382ZZ

INTAKE DOOR MOTOR

HAC-25

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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INTAKE DOOR MOTOR

System Description

INFOID:0000000009482474

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:0000000009482475

SYMPTOM:

• Intake door does not change.

• Intake door motor does not operate normally.

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (

)

1. Turn blower control dial to any speed.

WJIA1478E

WJIA1486E

 

 

 

 

 

 

 

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