Nissan Frontier D40. Manual - part 750

 

  Index      Nissan     Nissan Frontier D40 (2010 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  748  749  750  751   ..

 

 

Nissan Frontier D40. Manual - part 750

 

 

BLOWER MOTOR

HAC-103

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.

Front Blower Motor

Confirm smooth rotation of the blower motor.
• Ensure that there are no foreign particles inside the blower unit.
• Apply 12 volts to terminal 2 and ground to terminal 1 and verify that

the motor operates freely and quietly.

Front Blower Switch

Check continuity between terminals at each front blower speed posi-
tion.

Front Blower Motor Resistor

LJIA0068E

WJIA1508E

WJIA0508E

HAC-104

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

BLOWER MOTOR

Check continuity between terminals. There will be resistance, but
there should not be an open or short between any two terminals.

WJIA0971E

MAGNET CLUTCH

HAC-105

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

MAGNET CLUTCH

System Description

INFOID:0000000005275938

SYSTEM DESCRIPTION

The front air control controls compressor operation based on intake temperature and a signal from ECM.

Low Temperature Protection Control

The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-
sor.
When intake air temperature is higher than 3.5

°

C (38.3

°

F), the compressor turns ON. The compressor turns

OFF when intake air temperature is lower than 2.5

°

C (36.5

°

F).

Magnet Clutch Component Function Check

INFOID:0000000005275939

SYMPTOM: Magnet clutch does not engage.

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH

1.

Rotate blower control dial clockwise. 

2.

Rotate mode dial to vent (

) position.

3.

Press A/C switch. Confirm that the compressor clutch engages (sound or visual inspection). 

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-105, "Magnet Clutch Diagnosis Procedure"

.

Magnet Clutch Diagnosis Procedure

INFOID:0000000005275940

Regarding Wiring Diagram information, refer to 

HAC-117, "Wiring Diagram - Air Conditioner Control - Without

VBC"

.

DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH

SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

1.

PERFORM IPDM E/R AUTO ACTIVE TEST

Refer to 

PCS-15, "CONSULT - III Function (IPDM E/R)"

.

Does magnet clutch operate?

YES

>> •

WITH CONSULT-III

GO TO 2.

WJIA1490E

HAC-106

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

MAGNET CLUTCH

WITHOUT CONSULT-III

GO TO 8.

NO

>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 12.

2.

CHECK BCM INPUT (A/C COMPRESSOR ON) SIGNAL

Check A/C compressor ON/OFF signal. Refer to 

HAC-85, "CONSULT-III Function (BCM - AIR CONDI-

TIONER)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 8.

3.

CHECK REFRIGERANT PRESSURE SENSOR

Check refrigerant pressure sensor. Refer to 

EC-394, "Diagnosis Procedure"

 (QR25DE) or 

EC-878, "Diagnosis

Procedure"

 (VQ40DE).

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace refrigerant pressure sensor. Refer to 

HA-38, "Removal and Installation for Refrigerant

Pressure Sensor"

.

4.

CHECK BCM INPUT (FAN ON) SIGNAL

Check FAN ON/OFF signal. Refer to 

BCS-21, "AIR CONDITIONER : CONSULT-III Function (BCM - AIR CON-

DITIONER)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 5.

5.

CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector and front air control connector.

3.

Check continuity between BCM harness connector M18 (A) ter-
minal 28 and front air control harness connector M49 (B) termi-
nal 18.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)

A/C SW ON

: AIR COND SW ON

A/C SW OFF

: AIR COND SW OFF

BLOWER CONTROL DIAL 
ON

: FAN ON SIG ON

BLOWER CONTROL DIAL 
OFF

: FAN ON SIG OFF

A

B

Connector

Terminal Connector

Terminal 

Continuity

BCM: M18

28 

Front air control: 

M49

18

Yes

WJIA1627E

 

 

 

 

 

 

 

Content   ..  748  749  750  751   ..