Infiniti Q45 (FY33). Manual - part 479

THA282

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

EL

IDX

TROUBLE DIAGNOSES

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

HA-81

THA283

TROUBLE DIAGNOSES

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

HA-82

RHA950F

Auto Amp. Terminals and Reference Value

INSPECTION OF AUTO AMP.

I

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

I

Pin connector terminal layout

RHA159H

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

EL

IDX

TROUBLE DIAGNOSES

HA-83

AUTO AMP. INSPECTION TABLE

TERMINAL

NO.

ITEM

CONDITION

Voltage

V

1

Intake sensor

—

—

2

Ambient sensor

—

—

3

In-vehicle sensor

—

—

4

Vehicle speed sensor

When moving vehicle at 2 to 3 km/h (1 to 2 MPH).

Varies from 0 to 5

5

Rear window defogger

Defogger switch

ON

Approximately 12

OFF

Approximately 0

6

Intake door position switch

Intake door position

FRESH or 20% FRESH

Approximately 0

RECIRCULATION

Approximately 4.6

7

Multiplex communication (TX) signal

—

—

8

Multiplex communication (RX) signal

—

—

9

Sensor ground

—

Approximately 0

10

Sunload sensor

—

—

11

Thermal transmitter

Engine coolant tempera-

ture

Approximately

56°C (133°F)

Approximately 9.8

Approximately

80°C (176°F)

Approximately 7 - 8

Approximately

105°C (221°F)

Approximately 2.2

12

Ground (for Canada)

—

Approximately 0

14

A/C LAN signal

—

—

15

Power supply for rear vent door
motor

Mode switch: VENT

Set temperature:

18°C (65°F)

Approximately 0

Except above

Approximately 12

16

Mode switch: VENT

Set temperature:

18°C (65°F)

Approximately 12

Except above

Approximately 0

18

Intake door position switch

Intake door position

20% FRESH or RECIR-

CULATION

Approximately 0

FRESH

Approximately 4.6

19

Intake door position switch

Intake door position

FRESH or RECIRCULA-

TION

Approximately 0

20% FRESH

Approximately 4.6

20

Multiplex communication (CLK) signal

—

—

21

Power supply for mode door motor,
air mix door motor and bi-level door
motor

—

Approximately 12

22

Compressor ON signal

Compressor

ON

Approximately 0

OFF

Approximately 4.6

23

IACV-FICD solenoid valve

Ambient air temperature

Above 23.5°C

(74.3°F)

Approximately 0

Below 20.5°C

(68.9°F)

Approximately 12

24

Power supply for BAT.

—

Approximately 12

25

Power supply for IGN.

—

Approximately 12

26

Power supply for intake door motor

Recirculation switch

OFF

,

ON

*1

32

Ground

—

Approximately 0

TROUBLE DIAGNOSES

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

HA-84