Nissan Frontier D40. Manual - part 752

INTAKE SENSOR

HAC-111

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

After disconnecting intake sensor connector, measure resistance
between terminals 1 and 2 at sensor harness side, using the table
below.

If NG, replace intake sensor. Refer to 

VTL-8, "Removal and Installa-

tion"

.

Temperature 

°

C (

°

F)

Resistance k

Ω

−

15 (5)

209.0

−

10 (14)

160.0

−

5 (23)

123.0

0 (32)

95.8

5 (41)

74.9

10 (50)

58.9

15 (59)

46.7

20 (68)

37.3

25 (77)

30.0

30 (86)

24.2

35 (95)

19.7

40 (104)

16.1

45 (113)

13.2

WJIA1159E

HAC-112

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

Component Description

INFOID:0000000005275944

COMPONENT DESCRIPTION

Front Air Control

The front air control has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor, mode door motor, intake door
motor, defroster door motor, blower motor and compressor are then
controlled.
The front air control is unitized with control mechanisms. When the
various switches and temperature dials are operated, data is input to
the front air control. 

Potentio Temperature Control (PTC)

The PTC is built into the front air control. It can be set from cold to
hot or any intermediate position by rotating the temperature dial.

Front Air Control Component Function Check

INFOID:0000000005275945

SYMPTOM: A/C system does not come on. (if equipped)

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK

1.

Turn blower control dial to position 1-4, then press A/C switch.

2.

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-112, "Front Air Control Power and Ground Diagnosis

Procedure"

.

Front Air Control Power and Ground Diagnosis Procedure

INFOID:0000000005275946

Regarding Wiring Diagram information, refer to 

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

VBC"

.

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM

WJIA1302E

AWIIA1228ZZ

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

HAC-113

< COMPONENT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

SYMPTOM: A/C system does not come on. (if equipped)

1.

CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector.

3.

Turn ignition switch ON.

4.

Check voltage between front air control harness connector M49
terminals 6 and 19, and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>>

Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to 

PG-79, "Terminal

Arrangement"

.

• If fuses are OK, check harness for open circuit. Repair or replace as necessary.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces-

sary.

2.

CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Check continuity between front air control harness connector
M49 terminal 20 and ground.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair harness or connector.

WJIA1461E

Terminals

Ignition switch position

(+)

(-)

OFF

ACC

ON

Front air 

control 

connector

Terminal No.

M49

6 

Ground

Approx. 0V

Approx. 0V

Battery 
voltage

M49

19 

Battery 
voltage

Battery 
voltage

Battery 
voltage

WJIA1082E

20 - Ground

: Continuity should exist.

WJIA1239E

HAC-114

< ECU DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

MANUAL A/C IDENTIFICATION TABLE

ECU DIAGNOSIS

MANUAL A/C IDENTIFICATION TABLE

Application Table

INFOID:0000000005275947

Manual A/C Type

Description

Visual Identification

Manual A/C (Type 1)

Two Control Dial System 

[with variable blower control 

(VBC)]

Manual A/C (Type 2)

Three Control Dial System 

[without variable blower con-

trol (VBC)]

AWIIA0481ZZ

AWIIA1228ZZ