Nissan Frontier. Manual - part 906

 

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

 

Search            

 

 

 

 

 

 

 

  

 

Content   ..  904  905  906  907   ..

 

 

Nissan Frontier. Manual - part 906

 

 

HAC-178

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

AIR MIX DOOR MOTOR

Is the inspection result normal?

YES

>> GO TO 3.

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. Rotate the mode switch to the D/F (

) mode. 

4. Check voltage between front air control harness connector M49 terminal 3 and terminal 2 while rotating

the mode control dial to the VENT (

), and then the B/L (

) mode. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace front air control. Refer to 

VTL-7, "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 M49.

3. Check continuity between front air control harness connector M49 terminals 23, 26 and the air mix door

motor harness connector M147 terminals 1, 3.

4. Check continuity between front air control harness connector M49 terminals 23, 26 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 M49 terminal 22 and air mix door motor har-

ness connector M147 terminal 2.

2. Check continuity between front air control harness connector M49 terminal 22 and ground.

Connector

Terminal

—

Continuity

M49

3

Ground

No

2

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M49

2

3

Rotating the mode control dial from 

D/F (

) mode to VENT (

) mode

Battery voltage

3

2

Rotating the mode control dial from 

VENT (

) mode to B/L (

) mode

Battery voltage

Connector

Terminal

Connector

Terminal

Continuity

M49

26

M147

3

Yes

23

1

Connector

Terminal

—

Continuity

M49

23

Ground

No

26

Connector

Terminal

Connector

Terminal

Continuity

M49

22

M147

2

Yes

AIR MIX DOOR MOTOR

HAC-179

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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 M49 terminal 23 and terminal 26.

4. Check voltage between front air control harness connector M49 terminal 22 and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace front air control. Refer to 

VTL-7, "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 M49 terminal 22 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-7, "Removal and Installation"

.

NO

>> Replace the air mix door motor. Refer to 

VTL-23, "Removal and Installation"

.

Connector

Terminal

—

Continuity

M49

22

Ground

No

Connector

Terminals

Connector

Terminals

Voltage (Approx.)

(+)

(-) 

M49

23

M49

26

5 Volts

Connector

Terminal

—

Voltage (Approx.)

M49

22

Ground

0 Volts

Connector

Terminal

—

Voltage (Approx.)

M49

22

Ground

0.2 to 4.8 Volts

HAC-180

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

INTAKE DOOR MOTOR

INTAKE DOOR MOTOR

System Description

INFOID:0000000009478391

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:0000000009478392

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 4.

WJIA1478E

WJIA1486E

INTAKE DOOR MOTOR

HAC-181

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

2. Turn mode dial to vent mode (

).

3. Press REC (

) switch. 

4. Press REC (

) switch again.

5. 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-181, "Intake Door Motor Diagnosis Procedure"

.

Intake Door Motor Diagnosis Procedure

INFOID:0000000009478393

Regarding Wiring Diagram information, refer to 

HAC-200, "Wiring Diagram - With Type 2"

.

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 M49 and the intake door motor harness connector

M58.

3. Check continuity between front air control harness connector M49 terminals 4, 5 and the intake door

motor harness connector M58 terminals 1, 6.

4. Check continuity between front air control harness connector M49 terminals 4, 5 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 M49 terminal 4 and terminal 5 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-20, "Removal and Installation"

.

NO

>> Replace front air control. Refer to 

VTL-7, "Removal and Installation"

.

Connector

Terminal

Connector

Terminal

Continuity

M49

4

M58

1

Yes

5

6

Connector

Terminal

—

Continuity

M49

4

Ground

No

5

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M49

5

4

Self-diagnostic mode (opening)

Battery voltage

4

5

Self-diagnostic mode (closing)

Battery voltage

 

 

 

 

 

 

 

Content   ..  904  905  906  907   ..