Nissan Maxima. Manual - part 56

AV-44

< DTC/CIRCUIT DIAGNOSIS >

[MONOCHROME DISPLAY - W/O BOSE]

MICROPHONE SIGNAL CIRCUIT

MICROPHONE SIGNAL CIRCUIT

Description

INFOID:0000000009471184

Voice signals are transmitted from the microphone to the Bluetooth

®

 control unit using the microphone signal

circuits.

Diagnosis Procedure

INFOID:0000000009471185

Regarding Wiring Diagram information, refer to 

AV-54, "Wiring Diagram - Without BOSE Audio system"

.

1.

CHECK HARNESS BETWEEN BLUETOOTH

®

 CONTROL UNIT AND MICROPHONE

1. Turn ignition switch OFF.
2. Disconnect Bluetooth

®

 control unit connector and microphone

connector.

3. Check continuity between Bluetooth

®

 control unit harness con-

nector B126 (A) and microphone harness connector R7 (B).

4. Check continuity between Bluetooth

®

 control unit harness connector B126 (A) and ground.

Are the continuity test results as specified?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK MICROPHONE POWER SUPPLY

1. Connect Bluetooth

®

 control unit connector and microphone con-

nector.

2. Turn ignition switch ON.

3. Check voltage between microphone harness connector R7 ter-

minal 4 and ground.

Is voltage reading approx. 5 volts?

YES

>> GO TO 3.

NO

>> Replace Bluetooth

®

 control unit. Refer to 

AV-88, "Removal and Installation"

.

3.

CHECK MICROPHONE SIGNAL

A

B

Continuity

Connector

Terminal

Connector

Terminal

B126

7

R7

1

Yes

8

2

29

4

WKIA5795E

A

—

Continuity

Connector

Terminal

B126

7

Ground

No

8

29

(+)

(-)

Voltage (approx.)

Connector

Terminal

R7

4

Ground

5V

WKIA5796E

AV

MICROPHONE SIGNAL CIRCUIT

AV-45

< DTC/CIRCUIT DIAGNOSIS >

[MONOCHROME DISPLAY - W/O BOSE]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

Check signal between Bluetooth

®

 control unit harness connector

B126 terminals 7 and 8.

Are voltage readings as specified?

YES

>> Replace Bluetooth

®

 control unit. Refer to 

AV-88, "Removal and Installation"

.

NO

>> Replace microphone. Refer to 

AV-86, "Removal and Installation"

.

Connector

(+)

(-)

Reference signal

Terminal

Terminal

B126

7

8

While talking into microphone

ALNIA0934GB

PKIB5037J

AV-46

< ECU DIAGNOSIS INFORMATION >

[MONOCHROME DISPLAY - W/O BOSE]

AUDIO UNIT

ECU DIAGNOSIS INFORMATION

AUDIO UNIT

Reference Value

INFOID:0000000009471186

TERMINAL LAYOUT

PHYSICAL VALUES

AWNIA1685ZZ

Terminal

 (Wire color)

Item

Signal in-

put/out-

put

Condition

Reference value (approx)

+

–

Ignition 

switch

Operation

2 

(L)

3

 (B/W)

Audio sound 
signal front LH

Output

ON

Receive audio sig-
nal

4 

(LG)

5 

(B/Y)

Audio sound 
signal rear LH

Output

ON

Receive audio sig-
nal

6 

(W/G)

Ground

Steering 
switch signal 
A

Input

ON

Depress SOURCE 
switch.

0V

Depress  

switch.

0.7V

Depress  

switch.

1.3V

Depress  

 

switch.

2.0V

Except for above.

3.3V

7

 (V/Y)

Ground

ACC signal

Input

ON

Ignition switch 
ACC or ON

Battery voltage

9

 (R/L)

8

(R/Y)

ILL signal

Input

ON

Headlamps ON

Battery voltage

SKIA0177E

SKIA0177E

AV

AUDIO UNIT

AV-47

< ECU DIAGNOSIS INFORMATION >

[MONOCHROME DISPLAY - W/O BOSE]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

11 

(BR)

12 

(B/R)

Audio sound 
signal front 
RH

Output

ON

Receive audio sig-
nal

13

 (O)

14

 (B/P)

Audio sound 
signal rear RH

Output

ON

Receive audio sig-
nal

15

 (L/B)

–

Remote con-
trol ground

Input

–

–

–

16 

(GR/L)

Ground

Steering 
switch signal 
B

Input

ON

Depress volume 
DOWN switch.

0.7V

Depress volume 
UP switch.

1.3V

Depress  

  

switch.

2.0V

Except for above.

3.3V

19 

(Y/R)

Ground

Battery power

Input

–

–

Battery voltage

21

(G)

22

(R)

Multimedia 
CAN

Input

–

–

23 

(W/B)

Ground

Ladder out 1

Output

ON

Depress SOURCE 
switch.

0V

Depress  

switch.

0.7V

Depress  

switch.

1.3V

Depress  

 

switch.

2.0V

Except for above.

3.3V

24 

(GR/R)

Ground

Ladder out 2

Output

ON

Depress volume 
DOWN switch.

0.7V

Depress volume 
UP switch.

1.3V

Depress  

  

switch.

2.0V

Except for above.

3.3V

26

–

Shield

–

–

–

–

Terminal

 (Wire color)

Item

Signal in-

put/out-

put

Condition

Reference value (approx)

+

–

Ignition 

switch

Operation

SKIA0177E

SKIA0177E