Infiniti M45 (Y34). Manual - part 140

TROUBLE DIAGNOSIS

ATC-45

C

D

E

F

G

H

I

K

L

M

A

B

ATC

WITH NAVIGATION SYSTEM

TJWA0046E

ATC-46

TROUBLE DIAGNOSIS

WITHOUT NAVIGATION SYSTEM

TJWA0047E

TROUBLE DIAGNOSIS

ATC-47

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Auto Amp. Terminals and Reference Value

AJS000C5

Measure voltage between each terminal and ground by following ter-
minals and reference value for auto amp.

PIN CONNECTOR TERMINAL LAYOUT

TERMINALS AND REFERENCE VALUE FOR AUTO AMP.

RJIA0210E

RJIA0211E

Terminal 

No.

Wire 

color

Item

Ignition 

switch

Condition

Voltage

(V)

1

G/OR

Intake sensor

-

-

-

2

G/W

Ambient sensor

-

-

-

3

LG/B

In-vehicle sensor

-

-

-

4

PU/W

Vehicle speed sensor

ON

Speedometer operated
[When vehicle speed is approx. 
40km/h (25MPH)]

5

G/Y

A/C LAN signal

ON

-

Approx. 5

7

GY/L

Power supply for ACC

ACC or 

ON

-

Battery  voltage

9

L/W

Multiplex communication 
signal (TX) 

ON

-

10

L

Multiplex communication 
signal (RX)

ON

-

ELF1080D

RJIA0212E

RJIA0213E

ATC-48

TROUBLE DIAGNOSIS

11

R/Y

Sensor ground

ON

-

Approx. 0

12

SB

Sunload sensor

-

-

-

17

L/OR

Water temperature sen-
sor

-

At idle [after warming up, approx. 
80

°

C (176

°

F)]

CAUTION:

The waveforms vary depending 
on coolant temperature.

18

OR

Compressor feed back 
signal (Low-pressure cut)

ON

AUTO 

switch: ON 

(Compres-

sor: ON)

Blower motor operates.

Approx. 0

When the refrigerant 

pressure sensor con-

nector is disconnected

Approx. 5

20

L/R

Multiplex communication 
signal (CLK)

ON

-

21

GY

Power supply for mode 
door motor, air mix door 
motor, intake door motor

ON

-

Approx. 12

22

Y/B

Compressor ON signal

ON

AUTO switch: ON

Approx. 0

OFF switch: ON (A/C system OFF)

Approx. 5

23

G

ECV (Electronic Control 
Valve) signal

ON

Self-diagnosis: STEP-42

25

B

Ground

ON

-

Approx. 0

26

Y/G

Power supply for BAT

OFF

-

Battery voltage

27

P

Power supply for IGN

ON

-

Battery voltage

29

SB

Blower motor ON signal

ACC or 

ON

AUTO switch: ON 

(Blower motor operates.)

Approx. 0

AUTO switch: OFF

Approx. 5

35

L/OR

Blower motor drive signal

ON

Blower speed: 1st speed

Terminal 

No.

Wire 

color

Item

Ignition 

switch

Condition

Voltage

(V)

PKIA0098J

HAK0363D

RJIA1563E

SJIA0116J