Nissan Titan. Manual - part 382

 

  Index      Nissan     Nissan Titan (2014 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

  

 

Content   ..  380  381  382  383   ..

 

 

Nissan Titan. Manual - part 382

 

 

AIR MIX DOOR MOTOR

HAC-33

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Reconnect front air control harness connector.

2. Turn ignition switch ON.

3. Rotate temperature control dial (passenger) to 32

°C (90°F).

4. Check voltage between front air control harness connector M49

terminal 2 and terminal 14 while rotating temperature control dial

(passenger) to 18

°C (60°F) and back to 32°C (90°F).

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace front air control Refer to 

VTL-8, "Removal and Installation"

.

4.

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

1. Turn ignition switch OFF.

2. Disconnect the front air control harness connectors.

3. Check continuity between front air control harness connector

M49 (C) terminal 3 and M50 (A) terminal 28 and air mix door

motor (passenger) harness connector M143 (B) terminals 2, 3.

4. Check continuity between front air control harness connector

M49 (C) terminal 3, M50 (A) terminal 28 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness as necessary.

5.

CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND 

1. Check continuity between front air control harness connector

M50 (A) terminal 29 and air mix door motor (passenger) harness

connector M143 (B) terminal 4.

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M49

2

14

While rotating temperature control dial 
(passenger) from 32

°C (90°F) to 18°C 

(60

°F)

Battery voltage

14

2

While rotating temperature control dial 
(passenger) from 18

°C (60°F) to 32°C 

(90

°F)

Battery voltage

AWIIA0385ZZ

A and C

B

Continuity

Connector

Terminal

Connector

Terminal

M49 (C)

3

M143

2

Yes

M50 (A)

28

3

Connector

Terminal

—

Continuity

M49 (C)

3

Ground

No

M50 (A)

28

AWIIA0393ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M50

29

M143

4

Yes

AWIIA0133ZZ

HAC-34

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

2. Check continuity between front air control harness connector

M50 terminal 29 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness as necessary.

6.

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 M49

(B) terminal 3, and M50 (A) terminal 28.

4. Check voltage between front air control harness connector M50

terminal 29 and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace front air control. Refer to 

VTL-8, "Removal and

Installation"

.

7.

CHECK FRONT AIR CONTROL FOR FEEDBACK SIGNAL 

1. Reconnect the air mix door motor (passenger) harness connec-

tor M143.

2. Check voltage between front air control harness connector M50

terminal 29 and ground.

Is the inspection result normal?

YES

>> Inspect air mix door (passenger) for binding or mechani-

cal failure. If air mix door (passenger) moves freely,

replace front air control. Refer to 

VTL-8, "Removal and

Installation"

.

NO

>> Replace the air mix door motor (passenger). Refer to 

VTL-20, "Removal and Installation"

.

Connector

Terminal

—

Continuity

M50

29

Ground

No

AWIIA0132ZZ

A

B

Connector

Terminals

Connector

Terminals

Voltage (Approx.)

(+)

(-) 

M50

28

M49

3

5 Volts

AWIIA0813ZZ

Connector

Terminal

—

Voltage (Approx.)

M50

29

Ground

0 Volts

AWIIA0131ZZ

Connector

Terminal

—

Voltage (Approx.)

M50

29

Ground

0.2 to 4.8 Volts

AWIIA0131ZZ

INTAKE DOOR MOTOR

HAC-35

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INTAKE DOOR MOTOR

System Description

INFOID:0000000009882456

SYSTEM DESCRIPTION

SYMPTOM:

• Intake door motor does not operate normally.

• Intake door does not change.

SYSTEM DESCRIPTION

Component Parts

Intake door control system components are:

• Front air control

• Intake door motor (PRB built into the intake door motor)

• In-vehicle sensor

• Ambient sensor

• Optical sensor

• 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.

In the AUTO mode, the front air control determines the intake door position based on the ambient tempera-

ture, the intake air temperature and the in-vehicle temperature. When the DEF, D/F, FOOT or OFF switches

are pushed, the front air control sets the intake door at the fresh position.

Intake Door Control Specification

COMPONENT DESCRIPTION

WJIA1915E

WJIA0436E

HAC-36

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE DOOR MOTOR

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:0000000009882457

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (

)

1. Press the mode switch to vent mode(

).

2. Press REC (

) switch. The REC (

)indicator should illuminate.

3. Press REC (

) switch again. The REC (

) indicator should go out.

4. 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-36, "Intake Door Motor Diagnosis Procedure"

.

Intake Door Motor Diagnosis Procedure

INFOID:0000000009882458

Regarding Wiring Diagram information, refer to 

HAC-71, "Wiring Diagram - Automatic Air Conditioner"

.

SYMPTOM:

• Intake door does not change.

• Intake door motor does not operate normally.

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR

1.

CHECK INTAKE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND 

1. Turn ignition switch OFF.

2. Disconnect the front air control harness connector M49 (A) and

the intake door motor harness connector M58 (B).

3. Check continuity between front air control harness connector

M49 (A) terminals 21, 22 and the intake door motor harness

connector M58 (B) terminals 1, 6.

WJIA0552E

A

B

Continuity

Connector

Terminal

Connector

Terminal

M49

21

M58

6

Yes

22

1

AWIIA0401ZZ

 

 

 

 

 

 

 

Content   ..  380  381  382  383   ..