Nissan Titan A60. Manual - part 587

 

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Nissan Titan A60. Manual - part 587

 

 

AIR MIX DOOR MOTOR

HAC-31

< 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 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 M49

terminal 6 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 (driver) harness connector

M147.

2. Check voltage between front air control harness connector M49

terminal 6 and ground.

Is the inspection result normal?

YES

>> Inspect air mix door (driver) for binding or mechanical

failure. If air mix door (driver) moves freely, replace front

air control. Refer to 

VTL-8, "Removal and Installation"

.

NO

>> Replace air mix door motor (driver). Refer to 

VTL-20, "Removal and Installation"

.

Air Mix Door Motor (Passenger) Component Function Check

INFOID:0000000006164691

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1. Turn the temperature control dial (passenger) clockwise until 32

°C (90°F) is displayed.

2. 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 (passenger) counterclockwise until 18

°C (60°F) is displayed.

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

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-32, "Air Mix Door Motor (Passenger) Diagnosis Proce-

dure"

.

A

B

Connector

Terminals

Connector

Terminals

Voltage (Approx.)

(+)

(-) 

M50

28

M49

3

5 Volts

AWIIA0813ZZ

Connector

Terminal

Voltage (Approx.)

M49

6

Ground

0 Volts

AWIIA0382ZZ

Connector

Terminal

Voltage (Approx.)

M49

6

Ground

0.2 to 4.8 Volts

AWIIA0382ZZ

HAC-32

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

Air Mix Door Motor (Passenger) Diagnosis Procedure

INFOID:0000000006708576

Regarding Wiring Diagram information, refer to 

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

.

SYMPTOM:

• Discharge air temperature does not change.

• Air mix door motor does not operate.

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (PASSENGER)

1.

CHECK AIR MIX DOOR MOTOR (PASSENGER) POSITION BALANCED RESISTOR (PBR) FEEDBACK

VOLTAGE
1. Turn ignition switch ON.

2. Using CONSULT-III, check "PAS MIX FDBCK" in "DATA MONITOR" mode in "HVAC". Refer to 

HAC-17,

"CONSULT-III Function (HVAC)"

.

3. Observe "PAS MIX FDBCK" voltage while rotating temperature control dial (passenger) between 32

°C

(90

°F) and 18°C (60°F).

Is the inspection result normal?

YES

>> • Air mix door motor (passenger) is OK.

• Inspect air mix door (passenger) for mechanical failure and repair if necessary. If air mix door

(passenger) is OK, refer to 

HAC-83, "Component Function Check"

 for insufficient cooling or

HAC-91, "Component Function Check"

 for insufficient heating.

NO

>> GO TO 2.

2.

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

1. Turn ignition switch OFF.

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

the air mix door motor (passenger) harness connector M143 (B).

3. Check continuity between front air control harness connector

M49 (A) terminals 2, 14 and the air mix door motor (passenger)

harness connector M143 (B) terminals 1, 6.

4. Check continuity between front air control harness connector

M49 terminals 2, 14 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness as necessary.

3.

CHECK FRONT AIR CONTROL FOR AIR MIX DOOR MOTOR (PASSENGER) POWER AND GROUND 

Monitor Item

Condition

Results

PAS MIX FDBCK

Rotate temperature control dial (passenger) be-

tween 32

°C (90°F) and 18°C (60°F)

Voltage varies between 0.2 and 4.8 volts.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M49

14

M143

1

Yes

2

6

Connector

Terminal

Continuity

M49

14

Ground

No

2

AWIIA0389ZZ

AWIIA0386ZZ

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

 

 

 

 

 

 

 

Content   ..  585  586  587  588   ..