Infiniti M35/M45 Y50. Manual - part 185

TROUBLE DIAGNOSIS

AV-117

[WITHOUT MOBILE ENTERTAINMENT SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

AV

2. 

CHECK HARNESS BETWEEN AV (NAVI) CONTROL UNIT AND MIC.

1.

Turn ignition switch OFF.

2.

Disconnect AV (NAVI) control unit connector and MIC. connector.

3.

Check continuity between AV (NAVI) control unit harness con-
nector (A) M78 terminals 6, 7, 8 and MIC. harness connector (B)
R52 terminals 4, 2, 1.

4.

Check continuity between AV (NAVI) control unit  harness con-
nector (A) M78 terminals 6, 7,  8 and ground.

OK or NG

OK >> GO 

TO 

3.

NG

>> Repair harness or connector.

3. 

CHECK MIC. POWER SUPPLY

1.

Connect AV (NAVI) control unit  and MIC. connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV (NAVI) control unit harness connec-
tor M78 terminals 6 and 7. 

OK or NG

OK

>> GO TO 4.

NG

>> Replace AV (NAVI) control unit.

4. 

CHECK MIC. SIGNAL

1.

Check signal between AV (NAVI) control unit harness connector
M78 terminals 8 and 7.

OK or NG

OK

>> Replace AV (NAVI) control unit.

NG

>> Replace MIC.

THE SCREEN IS NOT SWITCHED BY PRESSING THE STEERING SWITCH

 Refer to 

AV-118, "Steering Switch Cannot Be Operated"

 .

6 – 4

: Continuity should exist.

7 – 2

: Continuity should exist.

8 – 1

: Continuity should exist.

6, 7, 8 – Ground

: Continuity should not exist.

SKIB4632E

6 – 7

: Approx. 5 V

SKIB4633E

8 – 7:

Give a voice

SKIB4634E

PKIB5037J

AV-118

[WITHOUT MOBILE ENTERTAINMENT SYSTEM]

TROUBLE DIAGNOSIS

Steering Switch Cannot Be Operated

NKS0049A

NONE OF THE OPERATIONS WORK.

1. 

CHECK HARNESS

1.

Check continuity between spiral cable harness connector (A)
M303 terminal 17 and audio unit harness connector (B) M76 ter-
minal 15.

OK or NG

OK

>> Replace steering switch.

NG

>> Check spiral cable. If the malfunction is detected, repair

the harness and connector.

“ENTER”, “MENU UP-DOWN”, AND “SOURCE” SWITCHES ARE NOT OPERATED

1. 

CHECK HARNESS

1.

Check continuity between spiral cable harness connector  (A)
M303 terminal 20 and audio unit harness connector (B) M76 ter-
minal 6.

2.

Check continuity between spiral cable harness connector (A)
M303 terminal 20 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check spiral cable. If the malfunction is detected, repair

the harness and connector.

2. 

CHECK STEERING SWITCH SIGNAL A

1.

Turn ignition switch ON.

2.

Check voltage between  audio unit harness connector M76 ter-
minals 6 and 15

OK or NG

OK

>> Replace steering switch.

NG

>> Replace audio unit.

17 – 15

: Continuity should exist.

SKIB6278E

20 – 6

: Continuity should exist.

20 – Ground

: Continuity should not exist.

SKIB4636E

6 – 15

: Approx. 5 V

SKIB4637E

TROUBLE DIAGNOSIS

AV-119

[WITHOUT MOBILE ENTERTAINMENT SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

AV

“PTT/TEL”, “BACK”, AND “VOLUME CONTROL” SWITCHES ARE NOT OPERATED

1. 

CHECK HARNESS

1.

Check continuity between spiral cable harness connector (A)
M303 terminal 16 and audio unit harness connector (B) M76 ter-
minal 16.

2.

Check continuity between spiral cable harness connector (A)
M303 terminal 16 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check spiral cable. If the malfunction is detected, repair

the harness and connector.

2. 

CHECK STEERING SWITCH SIGNAL B

1.

Turn ignition switch ON.

2.

Check voltage between  audio unit harness connector M76 ter-
minals 16 and 15

OK or NG

OK

>> Replace steering switch.

NG

>> Replace audio unit.

The Hands-Free Phone Cannot Be Used

NKS0049B

THE VOICE CANNOT BE HEARD

1. 

CHECK HARNESS AV (NAVI) CONTROL UNIT AND AUDIO UNIT

1.

Disconnect AV (NAVI) control unit connector and audio unit connector.

2.

Check continuity between AV (NAVI) control unit harness con-
nector (A) M78 terminals 10, 11 and audio unit harness connec-
tor (B) M77 terminals 30, 31.

3.

Check continuity between AV (NAVI) control unit harness con-
nector (A) M78 terminals 10, 11 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair harness or connector.

16 – 16

: Continuity should exist.

16 – Ground

: Continuity should not exist.

SKIB4638E

16 – 15

: Approx. 5 V

SKIB4639E

10 – 30

: Continuity should exist.

11 – 31

: Continuity should exist.

10, 11 – Ground

: Continuity should not exist.

SKIB4640E

AV-120

[WITHOUT MOBILE ENTERTAINMENT SYSTEM]

TROUBLE DIAGNOSIS

2. 

CHECK TEL VOICE SIGNAL

1.

Connect AV (NAVI) control unit connector and audio unit connector.

2.

Turn ignition switch ON.

3.

Check signal between  AV (NAVI) control unit harness connector
M78 terminals 10 and 11 

OK or NG

OK

>> Replace audio unit.

NG

>> Replace AV (NAVI) control unit.

THE VOICE CANNOT BE TRANSMITTED

 Refer to 

AV-116, "THE SCREEN IS SWITCHED BY PRESSING THE STEERING SWITCH"

 .

Voice Guidance Is Not Heard (Base System)

NKS0049C

1. 

CHECK HARNESS BETWEEN AV (NAVI) CONTROL UNIT AND AUDIO UNIT

1.

Disconnect AV (NAVI) control unit connector and audio unit connector.

2.

Check continuity between AV (NAVI) control unit harness con-
nector (A) M78 terminals 12, 14 and audio unit harness connec-
tor (B) M77 terminals 32, 33.

3.

Check continuity between AV (NAVI) control unit harness con-
nector (A) M78 terminals 12, 14 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair harness or connector.

2. 

CHECK VOICE GUIDANCE SIGNAL

1.

Connect AV (NAVI) control unit connector and audio unit connector.

2.

Turn ignition switch ON.

3.

Push the voice button. 

4.

Check signal between AV (NAVI) control unit harness connector
M78 terminals 12 and 14.

OK or NG

OK

>> Replace AV (NAVI) control unit.

NG

>> Replace audio unit.

10 – 11:

When inputting TEL voice

SKIB4641E

SKIB3609E

12 – 32

: Continuity should exist.

14 – 33

: Continuity should exist.

12, 14 – Ground

: Continuity should not exist.

SKIB4702E

12 – 14:

SKIB4645E

SKIB3609E