Infiniti M35/M45 Y50. Manual - part 223

TROUBLE DIAGNOSIS

AV-269

[WITH MOBILE ENTERTAINMENT SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

AV

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-269, "Steering Switch Cannot Be Operated"

 .

Steering Switch Cannot Be Operated

NKS004BC

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 steering switch 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.

8 – 7:

Give a voice

SKIB4634E

PKIB5037J

17 – 15

: Continuity should exist.

SKIB6278E

20 – 6

: Continuity should exist.

20 – Ground

: Continuity should not exist.

SKIB4636E

AV-270

[WITH MOBILE ENTERTAINMENT SYSTEM]

TROUBLE DIAGNOSIS

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.

“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 steering switch 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.

6 – 15

: Approx. 5 V

SKIB4637E

16 – 16

: Continuity should exist.

16 – Ground

: Continuity should not exist.

SKIB4638E

16 – 15

: Approx. 5 V

SKIB4639E

TROUBLE DIAGNOSIS

AV-271

[WITH MOBILE ENTERTAINMENT SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

AV

The Hands-Free Phone Cannot Be Used

NKS004BD

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.

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-268, "THE SCREEN IS SWITCHED BY PRESSING THE STEERING SWITCH"

 .

10 – 30

: Continuity should exist.

11 – 31

: Continuity should exist.

10, 11 – Ground

: Continuity should not exist.

SKIB4640E

10 – 11:

When inputting TEL voice

SKIB4641E

SKIB3609E

AV-272

[WITH MOBILE ENTERTAINMENT SYSTEM]

TROUBLE DIAGNOSIS

Voice Guidance Is Not Heard

NKS004BE

1. 

CHECK HARNESS BETWEEN AV (NAVI) CONTROL UNIT AND BOSE AMP

1.

Disconnect AV (NAVI) control unit connector and BOSE amp connector.

2.

Check continuity between AV (NAVI) control unit harness con-
nector (A) M78 terminals 12, 14 and BOSE amp harness con-
nector (B) B107 terminals 32, 12.

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 BOSE amp 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 BOSE amp.

12 – 32

: Continuity should exist.

14 – 12

: Continuity should exist.

12, 14 – Ground

: Continuity should not exist.

SKIB4644E

12 – 14:

SKIB4645E

SKIB3609E