Nissan Maxima. Manual - part 55

AV-40

< DTC/CIRCUIT DIAGNOSIS >

[MONOCHROME DISPLAY - W/O BOSE]

SUBWOOFER

1. Connect audio unit connector M133 and subwoofer amp. con-

nector B21.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between audio unit harness connector M133

terminals with CONSULT or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace subwoofer amp. Refer to 

AV-80, "Removal and

Installation"

.

NO

>> Replace audio unit. Refer to 

AV-73, "Removal and

Installation"

.

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M133

4

5

Receive 
audio sig-
nal

13

14

AWNIA0034ZZ

SKIA0177E

AV

STEERING SWITCH

AV-41

< DTC/CIRCUIT DIAGNOSIS >

[MONOCHROME DISPLAY - W/O BOSE]

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STEERING SWITCH

Description

INFOID:0000000009471182

When one of the steering wheel audio control switches is pushed, the resistance in steering switch circuit

changes depending on which button is pushed.

Diagnosis Procedure

INFOID:0000000009471183

Regarding Wiring Diagram information, refer to 

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

.

1.

CHECK STEERING SWITCH RESISTANCE

1. Disconnect steering switch connector M88.

2. Check resistance between steering switch connector terminals.

Do the steering switches check OK?

YES

>> GO TO 2.

NO

>> Replace steering switch. Refer to 

AV-81, "Removal and Installation"

.

2.

CHECK HARNESS BETWEEN COMBINATION SWITCH (SPIRAL CABLE) AND BLUETOOTH

®

 CON-

TROL UNIT

1. Turn ignition switch OFF.
2. Disconnect Bluetooth

®

 control unit connector B126 and combination switch (spiral cable) connector M30.

3. Check continuity between Bluetooth

®

 control unit harness connector B126 and combination switch (spiral

cable) harness connector M30.

4. Check continuity between Bluetooth

®

 control unit connector B126 and ground.

Are the continuity results as specified?

YES

>> GO TO 3.

NO

>> Repair harness.

Terminal

Signal name

Condition

Resistance 

(

Ω)

(Approx.)

14

17

Source

Depress SOURCE switch.

0

Seek (up)

Depress  

switch.

121

Seek (down)

Depress  

switch.

321

Phone/Send

Depress 

  switch.

723

15

Volume (down)

Depress volume DOWN switch.

0

Volume (up)

Depress volume UP switch.

121

Phone/End

Depress  

  switch.

321

AWNIA0035ZZ

Connector

Terminal

Connector

Terminal

Continuity

B126

12

M30

24

Yes

13

31

14

33

Connector

Terminal

—

Continuity

B126

12

Ground

No

13

14

AV-42

< DTC/CIRCUIT DIAGNOSIS >

[MONOCHROME DISPLAY - W/O BOSE]

STEERING SWITCH

3.

CHECK HARNESS BETWEEN COMBINATION SWITCH (SPIRAL CABLE) AND AUDIO UNIT

1. Disconnect audio unit connector M147.

2. Check continuity between audio unit harness connector M147 and combination switch (spiral cable) har-

ness connector M30.

3. Check continuity between audio unit connector M147 and ground.

Are the continuity results as specified?

YES

>> GO TO 4.

NO

>> Repair harness.

4.

COMBINATION SWITCH (SPIRAL CABLE) CHECK

1. Check continuity between combination switch (spiral cable) har-

ness connector M30 (A) and M88 (B).

Does the combination switch (spiral cable) check OK?

YES

>> GO TO 5.

NO

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

SR-15, "Removal and Installation"

.

5.

CHECK HARNESS BETWEEN BLUETOOTH

®

 CONTROL UNIT AND AUDIO UNIT

1. Disconnect audio unit connector M133.
2. Check continuity between Bluetooth

®

 control unit harness connector B126 and audio unit harness con-

nector M133.

3. Check continuity between Bluetooth

®

 control unit connector B126 and ground.

Are the continuity results as specified?

YES

>> GO TO 6.

Connector

Terminal

Connector

Terminal

Continuity

M147

23

M30

24

Yes

24

31

30

33

Connector

Terminal

—

Continuity

M147

23

Ground

No

24

30

A

B

Continuity

Connector

Terminal

Connector

Terminal

M30

24

M88

14

Yes

31

15

33

17

ALNIA0931GB

Connector

Terminal

Connector

Terminal

Continuity

B126

17

M133

6

Yes

18

16

19

15

Connector

Terminal

—

Continuity

B126

17

Ground

No

18

19

AV

STEERING SWITCH

AV-43

< DTC/CIRCUIT DIAGNOSIS >

[MONOCHROME DISPLAY - W/O BOSE]

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NO

>> Repair harness.

6.

CHECK AUDIO UNIT VOLTAGE

1. Connect audio unit harness connector M133 and Bluetooth

®

 control unit harness connector B126.

2. Turn ignition switch ON.

3. Check voltage between audio unit harness connector M133 terminals.

Are the continuity results as specified?

YES

>> Replace Bluetooth

®

 control unit. Refer to 

AV-88, "Removal and Installation"

.

NO

>> Replace audio unit. Refer to 

AV-73, "Removal and Installation"

.

(+)

(-)

Voltage

(Approx.)

Audio unit

Audio unit

Connector

Terminal

Connector

Terminal

M133

6

M133

15

3.3V

16