Nissan Titan A60. Manual - part 630

 

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Nissan Titan A60. Manual - part 630

 

 

AIR MIX DOOR MOTOR

HAC-203

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

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G

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A

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HAC

N

O

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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

M176 terminal 3 and terminal 4 while rotating temperature con-

trol 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"

.

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 connector M176 (A).

3. Check continuity between front air control harness connector

M176 (A) terminals 2, 15 and air mix door motor harness con-

nector M147 (B) terminals 2, 3.

4. Check continuity between front air control harness connector

M176 terminals 2, 15 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

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

M176 (A) terminal 18 and air mix door motor harness connector

M147 (B) terminal 4.

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M176

3

4

While rotating temperature control 

dial from 32

°C (90°F) to 18°C (60°F)

Battery voltage

4

3

While rotating temperature control 

dial from 18

°C (60°F) to 32°C (90°F)

Battery voltage

AWIIA0504ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M176

15

M147

2

Yes

2

3

Connector

Terminal

Continuity

M176

15

Ground

No

2

AWIIA0955ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M176

18

M147

4

Yes

AWIIA0515ZZ

HAC-204

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

AIR MIX DOOR MOTOR

2. Check continuity between front air control harness connector

M176 terminal 18 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

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

M176 terminal 2 and terminal 15.

4. Check voltage between front air control harness connector

M176 terminal 18 and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace front air control. Refer to 

VTL-8, "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

M176 terminal 18 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-8, "Removal and Installation"

.

NO

>> Replace air mix door motor. Refer to 

VTL-20, "Removal

and Installation"

.

Connector

Terminal

Continuity

M176

18

Ground

No

AWIIA0514ZZ

Connector

Terminal

Connector

Terminal

Voltage (Approx.)

(+)

(-) 

M176

2

M176

15

5 Volts

AWIIA0511ZZ

Connector

Terminal

Voltage (Approx.)

M176

18

Ground

0 Volts

AWIIA0513ZZ

Connector

Terminal

Voltage (Approx.)

M176

18

Ground

0.2 to 4.8 Volts

AWIIA0513ZZ

INTAKE DOOR MOTOR

HAC-205

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

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INTAKE DOOR MOTOR

System Description

INFOID:0000000006164819

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 (PBR built into the 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.

Intake Door Control Specification

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:0000000006164820

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (

)

1. Press the vent mode switch (

).

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).

WJIA0436E

WJIA0552E

HAC-206

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

INTAKE DOOR MOTOR

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-206, "Intake Door Motor Diagnosis Procedure"

Intake Door Motor Diagnosis Procedure

INFOID:0000000006164821

Regarding Wiring Diagram information, refer to 

HAC-232, "Wiring Diagram - Manual With 3 Control Dial Sys-

tem"

.

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR

SYMPTOM:

• Intake door does not change.

• Intake door motor does not operate normally.

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 M176 (A) and

the intake door motor harness connector M58 (B).

3. Check continuity between front air control harness connector

M176 (A) terminals 8, 7 and the intake door motor harness con-

nector M58 (B) terminals 1, 6.

4. Check continuity between front air control harness connector

M176 terminals 8, 7 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness as necessary.

2.

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

1. Reconnect front air control harness connector.

2. Turn ignition switch ON.

3. Check voltage between front air control harness connector

M176 terminal 8 and terminal 7 while placing the HVAC system

into self-diagnostic mode.

Is the inspection result normal?

YES

>> Inspect intake air door for binding or mechanical failure. If intake air door moves freely, replace the

intake air door motor. Refer to 

VTL-18, "Removal and Installation"

.

NO

>> Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M176

8

M58

6

Yes

7

1

Connector

Terminal

Continuity

M176

8

Ground

No

7

AWIIA0520ZZ

AWIIA0517ZZ

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M176

8

7

Self-diagnostic mode (opening)

Battery voltage

7

8

Self-diagnostic mode (closing)

Battery voltage

AWIIA0516ZZ

 

 

 

 

 

 

 

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