Infiniti G20 (P11). Manual - part 424

THA251

GI

MA

EM

LC

EC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

AUTO

Wiring Diagram — A/C, A — (Cont’d)

HA-27

THA252

TROUBLE DIAGNOSES

AUTO

Wiring Diagram — A/C, A — (Cont’d)

HA-28

RHA464G

Auto Amp. Terminals and Reference Value

NCHA0036

INSPECTION OF AUTO AMP.

NCHA0036S01

I

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

I

Pin connector terminal layout

RHA501GB

AUTO AMP. INSPECTION TABLE

NCHA0036S02

TERMI-

NAL NO.

ITEM

CONDITION

Voltage

V

1

Intake sensor

—

—

2

Ambient sensor

—

—

3

In-vehicle sensor

—

—

8

Intake door position switch

Intake door position

FRESH or 20% FRESH

Approximately 0

RECIRCULATION

Approximately 4.6

11

Sensor ground

—

Approximately 0

12

Sunload sensor

—

—

13

Thermal transmitter

Engine coolant

temperature

Approximately 40°C (104°F)

Approximately 10.8

Approximately 55°C (131°F)

Approximately 9.9

Approximately 60°C (140°F)

Approximately 9.5

14

Ground (for Canada)

—

Approximately 0

16

A/C LAN signal

—

Approximately 5.5

18

Intake door position switch

Intake door position

20% FRESH or RECIRCU-

LATION

Approximately 0

FRESH

Approximately 4.6

19

Intake door position switch

Intake door position

20% FRE

Approximately 0

RECIRCULATION or

FRESH

Approximately 4.7

21

Power supply for mode door

motor and air mix door motor

—

Approximately 12

GI

MA

EM

LC

EC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

AUTO

Auto Amp. Terminals and Reference Value

HA-29

TERMI-

NAL NO.

ITEM

CONDITION

Voltage

V

22

Compressor ON signal

Compressor

ON

Approximately 0

OFF

Approximately 4.6

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 0

RECIRCULATION

Approximately 12

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 signal

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 12

RECIRCULATION

Approximately 0

TROUBLE DIAGNOSES

AUTO

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

HA-30