Infiniti G35 (V35). Manual — part 110

TROUBLE DIAGNOSIS

ATC-111

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Multiplex Communication Circuit

NJS0003U

DIAGNOSIS PROCEDURE FOR MULTIPLEX COMMUNICATION

SYMPTOM: A/C system cannot be controlled.

1.

CHECK DISPLAY AND A/C AUTO AMP. OUTPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check multiplex communication signal between display and A/C
auto amp. harness connector M31 terminals 15, 35 and ground
using an oscilloscope.

OK or NG

OK

>> GO TO 2.

NG

>> Replace display and A/C auto amp.

RJIA3540E

Terminals

Voltage

(+)

(

−

)

Display and A/C

auto amp. connector

Terminal No.

M31

15

Ground

M31

35

RJIA3541E

RJIA0212E

SJIA1479J

ATC-112

TROUBLE DIAGNOSIS

2.

CHECK CIRCUIT CONTINUITY BETWEEN A/C AND AUDIO CONTROLLER AND DISPLAY AND A/C

AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect A/C and audio controller connector and display and
A/C auto amp. connector.

3.

Check continuity between A/C and audio controller harness con-
nector M38 terminals 6, 5 and display and A/C auto amp. har-
ness connector M31 terminals 15, 35.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3.

CHECK DISPLAY AND A/C AUTO AMP. INPUT SIGNAL

1.

Reconnect A/C and audio controller connector and display and
A/C auto amp. connector.

2.

Turn ignition switch ON.

3.

Confirm multiplex communication signal between display and A/
C auto amp. harness connector M31 terminal 14 and ground
using an oscilloscope.

OK or NG

OK

>> Replace display and A/C auto amp.

NG

>> GO TO 4.

4.

CHECK CIRCUIT CONTINUITY BETWEEN A/C AND AUDIO CONTROLLER AND DISPLAY AND A/C

AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect A/C and audio controller connector and display and
A/C auto amp. connector.

3.

Check continuity between A/C and audio controller harness con-
nector M38 terminal 7 and display and A/C auto amp. harness
connector M31 terminal 14.

OK or NG

OK

>> Replace A/C and audio controller.

NG

>> Repair harness or connector.

6 – 15

: Continuity should exist.

5 – 35

: Continuity should exist.

RJIA3542E

Terminals

Voltage

(+)

(

−

)

Display and A/C

auto amp. connector

Terminal No.

M31

14

Ground

RJIA3543E

RJIA0213E

7 – 14

: Continuity should exist.

RJIA3544E

A/C AND AUDIO CONTROLLER

ATC-113

C

D

E

F

G

H

I

K

L

M

A

B

ATC

A/C AND AUDIO CONTROLLER

PFP:28074

Removal and Installation

NJS0003V

REMOVAL

Refer to

AV-33, "Removal and Installation for A/C and Audio Controller"

.

INSTALLATION

Installation is basically the reverse order of removal.

ATC-114

AUTO AMP

AUTO AMP

PFP:27760

Removal and Installation of Display and A/C Auto Amp.

NJS0003W

REMOVAL

1.

Remove cluster lid finisher. Refer to

IP-10, "INSTRUMENT PANEL ASSEMBLY"

.

2.

Remove mounting screws, and then remove display and A/C
auto amp.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA3583E