Nissan Titan A60. Manual - part 609

 

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Nissan Titan A60. Manual - part 609

 

 

MODE DOOR MOTOR

HAC-119

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

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

M180   (B) terminal 3, and M181 (A) terminal 28.

4. Check voltage between front air control harness connector

M180 terminal 7 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 mode door motor harness connector M142.

2. Check voltage between front air control harness connector

M180 terminal 7 and ground.

Is the inspection result normal?

YES

>> Inspect mode door for binding or mechanical failure. If

mode door moves freely, replace front air control. Refer

to 

VTL-8, "Removal and Installation"

.

NO

>> Replace the mode door motor. Refer to 

VTL-19,

"Removal and Installation"

.

A

B

Connector

Terminals

Connector

Terminals

Voltage (Approx.)

(+)

(-) 

M181

28

M180

3

5 Volts

Connector

Terminal

Voltage (Approx.)

M180

7

Ground

0 Volts

AWIIA0813ZZ

AWIIA0369ZZ

Connector

Terminal

Voltage (Approx.)

M180

7

Ground

0.2 to 4.8 Volts

AWIIA0369ZZ

HAC-120

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

AIR MIX DOOR MOTOR

AIR MIX DOOR MOTOR

System Description

INFOID:0000000006164757

SYSTEM DESCRIPTION

SYMPTOM:

• Discharge air temperature does not change.

• Air mix door motor does not operate.

SYSTEM DESCRIPTION

Component Parts

Air mix door control system components are:

• Front air control

• Air mix door motor

• Position balanced resistor (PBR) (built-into air mix door motors)

• Intake sensor

System Operation

The front air control receives data from the temperature selected by the driver side, passenger side, and rear.

The front air control then applies a voltage to one circuit of the appropriate air mix door motor, while ground is

applied to the other circuit, causing the appropriate air mix door motor to rotate. The direction of rotation is

determined by which circuit has voltage applied to it, and which one has ground applied to it. The front air con-

trol monitors the air mix door positions by measuring the voltage signal on the PBR circuits of each door.

Air Mix Door Control Specification

COMPONENT DESCRIPTION

Air Mix Door Motors

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

unit assembly. The 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:0000000006164758

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1. Turn the temperature control dial clockwise to maximum hot.

2. Check for hot air at discharge air outlets.

WJIA0435E

AWIIA1391ZZ

AIR MIX DOOR MOTOR

HAC-121

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

>> 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 result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-121, "Air Mix Door Motor Diagnosis Procedure"

.

Air Mix Door Motor Diagnosis Procedure

INFOID:0000000006164759

Regarding Wiring Diagram information, refer to 

HAC-155, "Wiring Diagram - Manual With 2 Control Dial Sys-

tem"

.

SYMPTOM:

• Discharge air temperature does not change.

• Air mix door motor does not operate.

1.

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

1. Turn ignition switch ON.

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

HAC-111,

"CONSULT-III Function (HVAC)"

.

3. Observe "DVR MIX FDBACK" voltage while rotating temperature control dial between 32

°C (90°F) and

18

°C (60°F).

Is the inspection result normal?

YES

>> • Air mix door motor is OK.

• Inspect air mix door for mechanical failure and repair if necessary. If air mix door is OK, refer to

HAC-167, "Component Function Check"

 for insufficient cooling or 

HAC-175, "Component Func-

tion Check"

 for insufficient heating.

NO

>> GO TO 2.

2.

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 M180 (A) and

the air mix door motor harness connector M147 (B).

3. Check continuity between front air control harness connector

M180 (A) terminals 17, 18 and the air mix door motor harness

connector M147 (B) terminals 1, 6.

Monitor Item

Condition

Results

DVR MIX FDBCK

Rotate temperature control dial between 32

°C 

(90

°F) and 18°C (60°F)

Voltage varies with dial rotation between 0.2 and 4.8 

volts.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M180

17

M147

1

Yes

18

6

AWIIA0377ZZ

HAC-122

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

AIR MIX DOOR MOTOR

4. Check continuity between front air control harness connector

M180 terminals 17, 18 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 POWER AND GROUND 

1. Reconnect front air control harness connector.

2. Turn ignition switch ON.

3. Rotate temperature control dial to 32

°C (90°F).

4. Check voltage between front air control harness connector

M180 terminal 17 and terminal 18 while rotating temperature

control dial 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 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

M180 (C) terminal 3, connector M181 (A) terminal 28 and air mix

door motor harness connector M147 (B) terminals 3, 2.

4. Check continuity between front air control harness connector

M180 (C) terminal 3, M181 (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 

Connector

Terminal

Continuity

M180

17

Ground

No

18

AWIIA0374ZZ

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M180

17

18

While rotating temperature control 

dial from 32

°C (90°F) to 18°C (60°F)

Battery voltage

18

17

While rotating temperature control 

dial from 18

°C (60°F) to 32°C (90°F)

Battery voltage

AWIIA0373ZZ

A and C

B

Continuity

Connector

Terminal

Connector

Terminal

M180 (C)

3

M147

2

Yes

M181 (A)

28

3

Connector

Terminal

Continuity

M180 (C)

3

Ground

No

M181 (A)

28

AWIIA0393ZZ

 

 

 

 

 

 

 

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