Nissan Sentra. Manual - part 14

AV-48

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

MICROPHONE SIGNAL CIRCUIT

MICROPHONE SIGNAL CIRCUIT

Diagnosis Procedure

INFOID:0000000009758817

Regarding Wiring Diagram information, refer to 

AV-25, "Wiring Diagram"

.

1.

CHECK HARNESS BETWEEN BLUETOOTH

®

 CONTROL UNIT AND MICROPHONE

1. Turn ignition switch OFF.
2. Disconnect Bluetooth

®

 control unit connector M45 and microphone connector R4.

3. Check continuity between Bluetooth

®

 control unit connector M45 and microphone connector R4.

4. Check continuity between Bluetooth

®

 control unit connector M45 and ground.

Are continuity results as specified?

YES

>> GO TO 2

NO

>> Repair harness or connectors.

2.

CHECK MICROPHONE POWER SUPPLY

1. Connect Bluetooth

®

 control unit connector M45 and microphone connector R4.

2. Turn ignition switch ON.

3. Check voltage between microphone connector R4 and ground.

Is the voltage reading as specified?

YES

>> GO TO 3

NO

>> Replace Bluetooth

®

 control unit. Refer to 

AV-68, "Removal and Installation"

.

3.

CHECK MICROPHONE SIGNAL

Check signal between terminals of Bluetooth

®

 control unit connector M45.

Bluetooth

®

 control unit

Microphone

Continuity

Connector

Terminal

Connector

Terminal

M45

7

R4

1

Yes

8

2

29

4

Bluetooth

®

 control unit

Ground

Continuity

Connector

Terminal

M45

7

—

No

29

Microphone

Ground

Voltage

(Approx.)

(+)

(-)

Connector

Terminal

R4

29

—

5V

AV

MICROPHONE SIGNAL CIRCUIT

AV-49

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

Were voltage readings as specified?

YES

>> Replace Bluetooth

®

 control unit. Refer to 

AV-68, "Removal and Installation"

.

NO

>> Replace microphone. Refer to 

AV-69, "Removal and Installation"

.

Bluetooth

®

 control unit connector M45

Condition

Reference value

(+)

(-)

Terminal

Terminal

7

8

Speak into microphone.

SKIB3609E

AV-50

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

STEERING SWITCH

STEERING SWITCH

Diagnosis Procedure

INFOID:0000000009758818

Regarding Wiring Diagram information, refer to 

AV-25, "Wiring Diagram"

.

WITH BLUETOOTH

®

1.

CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE

1. Turn ignition switch OFF.

2. Disconnect combination switch (spiral cable) connector M79.

3. Check resistance between the terminals of combination switch (spiral cable) connector M79.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace steering switches. Refer to 

AV-62, "Removal and Installation"

.

2.

CHECK HARNESS BETWEEN BLUETOOTH

®

 CONTROL UNIT AND COMBINATION SWITCH (SPIRAL

CABLE)

1. Disconnect Bluetooth

®

 control unit connector M45 and combination switch (spiral cable) connector M80.

2. Check continuity between Bluetooth

®

 control unit connector M45 and combination switch (spiral cable)

connector M80.

3. Check continuity between Bluetooth

®

 control unit connector M45 and ground.

Is the inspection result normal?

combination switch (spiral cable) connector M79

Condition

Resistance 

Ω

(Approx.)

Terminal

Terminal

14

17

Depress SOURCE switch.

1

Depress  

switch.

121

Depress  

switch.

321

Depress  

switch.

723

15

Depress  

switch.

1

Depress  

switch.

121

Depress  

switch. 

321

Bluetooth

®

 control unit

Combination switch (spiral cable) 

Continuity

Connector

Terminal

Connector

Terminal

M45

12

M80

24

Yes

13

31

14

33

Bluetooth

®

 control unit

Ground

Continuity

Connector

Terminal

M45

12

—

No

13

14

AV

STEERING SWITCH

AV-51

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

YES

>> GO TO 3.

NO

>> Repair or replace harness or connectors.

3.

CHECK COMBINATION SWITCH (SPIRAL CABLE)

Check continuity between combination switch (spiral cable) connectors M79 and M80.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace combination switch (spiral cable). Refer to 

SR-16, "Removal and Installation"

.

4.

CHECK HARNESS BETWEEN BLUETOOTH

®

 CONTROL UNIT AND AUDIO UNIT 

1. Disconnect audio unit connector M43.
2. Check continuity between Bluetooth

®

 control unit connector M45 and audio unit connector M43.

3. Check continuity between Bluetooth

®

 control unit connector M45 and ground.

Is the inspection result normal?

YES

>> Replace audio unit. Refer to 

AV-58, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

WITHOUT BLUETOOTH

®

1.

CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE

1. Turn ignition switch OFF.

2. Disconnect combination switch (spiral cable) connector M79.

3. Check resistance between the terminals of combination switch (spiral cable) connector M79.

Combination switch (spiral cable) 

Continuity

Connector

Terminal

Connector

Terminal

M79

14

M80

24

Yes

15

31

17

33

Bluetooth

®

 control unit

Audio unit 

Continuity

Connector

Terminal

Connector

Terminal

M45

17

M43

6

Yes

18

16

19

15

Bluetooth

®

 control unit

Ground

Continuity

Connector

Terminal

M45

17

—

No

18

19