Infiniti QX4 (R50). Manual - part 460

MHA981A

TROUBLE DIAGNOSES

Wiring Diagram — A/C, A — (With Navigation System) (Cont’d)

HA-38

MHA982A

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

Wiring Diagram — A/C, A — (With Navigation System) (Cont’d)

HA-39

RHA464GA

RHA858H

Auto Amp. Terminals and Reference Value

NBHA0036

INSPECTION OF AUTO AMP.

NBHA0036S01

I

Measure voltage between each terminal and body ground by
following “AUTO AMP. INSPECTION TABLE”.

I

Pin connector terminal layout

RHA839H

AUTO AMP. INSPECTION TABLE

NBHA0036S02

Without Navigation System

NBHA0036S0201

TERMINAL

NO.

ITEM

CONDITION

Voltage

V

1

Intake sensor

—

—

2

Ambient sensor

—

—

3

In-vehicle sensor

—

—

6

ECM signal

Compressor: ON

Approximately 0

Ccompressor: OFF

Approximately 4.6

8

Intake door position switch

Intake door position

FRESH

Approximately 0

RECIRCULATION or 20%

FRESH

Approximately 4.6

11

Sensor ground

—

Approximately 0

12

Sunload sensor

—

—

TROUBLE DIAGNOSES

Auto Amp. Terminals and Reference Value

HA-40

TERMINAL

NO.

ITEM

CONDITION

Voltage

V

13

Thermal transmitter

Engine coolant

temperature

Approximately 30°C (86°F)

Approximately 9.4

Approximately 55°C (131°F)

Approximately 6.5

Approximately 100°C

(212°F)

Approximately 2.4

14

Ground (for Canada)

—

Approximately 0

16

A/C LAN signal

—

Approximately 5.5

18

Intake door position switch

Intake door position

20% FRE or RECIRCULA-

TION

Approximately 0

FRESH

Approximately 4.6

19

Intake door position switch

Intake door position

RECIRCULATION or

FRESH

Approximately 0

20% FRE

Approximately 4.6

21

Power supply for mode door

motor and air mix door motor

—

Approximately 12

22

Compressor ON signal

Compressor

ON

Approximately 0

OFF

Approximately 4.6

24

Power supply for illumination

Lighting switch

OFF

Approximately 0

1st

Approximately 12

25

Illumination ground

—

Approximately 0

26

Power supply for BAT

—

BATTERY VOLTAGE

27

Power supply for IGN

—

Approximately 12

28

Power supply for intake door

motor

Intake door position

FRESH

Approximately 12

RECIRC

Approximately 0

32

Ground

—

Approximately 0

33

Power source for A/C

Ignition voltage feed back

Approximately 12

34

Blower motor feed back

Fan speed: Low

Approximately 7 - 10

35

Fan control AMP. control sig-

nal

Fan speed

Low, Middle low or Middle

high

Approximately 2.5 -

3.0

High

Approximately 9 - 10

36

Power supply for intake door

motor

Intake door position

FRESH

Approximately 0

RECIRC

Approximately 12

With Navigation System

NBHA0036S0202

TERMINAL

NO.

ITEM

CONDITION

Voltage

V

1

Intake sensor

—

—

2

Ambient sensor

—

—

3

In-vehicle sensor

—

—

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

Auto Amp. Terminals and Reference Value (Cont’d)

HA-41