Nissan Altima HL32 Hybrid. Manual - part 9

AV-28

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

SOUND SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect satellite radio tuner (factory installed) connector

B123 (A) and audio unit connector M45 (B).

3. Check continuity between satellite radio tuner (factory installed)

and audio unit.

4. Check continuity between satellite radio tuner (factory installed) and ground.

Are continuity results as specified?

YES

>> GO TO 2

NO

>> Repair harness or connector.

2.

CHECK RIGHT CHANNEL AUDIO SIGNAL

1. Connect satellite radio tuner (factory installed) and audio unit.

2. Turn ignition switch ON.

3. Check signal between satellite radio tuner (factory installed)

connector B123 terminals 23 and 24 with CONSULT-III or oscil-

loscope.

Are voltage readings as specified?

YES

>> Replace audio unit. Refer to 

AV-46, "Removal and Installation"

.

NO

>> Replace satellite radio tuner. Refer to 

AV-137, "Removal and Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

B123

23

M45

33

Yes

24

34

A

—

Continuity

Connector

Terminal

B123

23

Ground

No

24

AWNIA0042ZZ

23 - 24

WKIA4550E

SKIB3609E

AV

AUDIO UNIT

AV-29

< ECU DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

ECU DIAGNOSIS

AUDIO UNIT

Reference Value

INFOID:0000000004219408

TERMINAL LAYOUT

PHYSICAL VALUES

AWNIA0043ZZ

Terminal

 (Wire color)

Item

Signal 

input/

output

Condition

Reference value

+

–

Ignition 

switch

Operation

2 

(W)

3 

(B)

Audio sound 
signal front LH

Output

ON

Receive audio sig-
nal

4 

(O/B)

5 

(W/R)

Audio sound 
signal rear LH

Output

ON

Receive audio sig-
nal

6 

(W/G)

Ground

Remote con-
trol A

Input

ON

Press SOURCE 

switch

Approx. 0.0V

Press SEEK UP 

switch

Approx. 0.75V

Press VOL UP 

switch

Approx. 2.0V

Except for above

Approx. 5.0V

7 

(V/Y)

Ground

ACC signal

Input

ON

Ignition switch 
ACC or ON

Battery voltage

11 

(G/W)

12 

(BR)

Audio sound 
signal front 
RH

Output

ON

Receive audio sig-
nal

SKIA0177E

SKIA0177E

SKIA0177E

AV-30

< ECU DIAGNOSIS >

[BASE AUDIO]

AUDIO UNIT

13 

(L)

14 

(B/W)

Audio sound 
signal rear RH

Output

ON

Receive audio sig-
nal

15 

(L/B)

–

Remote con-
trol ground

Input

–

–

–

16 

(GR/L)

Ground

Remote con-
trol B

Input

ON

Press SEEK 

DOWN switch

Approx. 0.75V

Press VOL DOWN 

switch

Approx. 2.0V

Except for above

Approx. 5.0V

19 

(Y/R)

Ground

Battery power

Input

–

–

Battery voltage

32 

(Y/L)

31 

(W/L)

Audio left 
channel 
sound signal 
from satellite 
radio tuner

Input

ON

Receive audio sig-
nal

34 

(BR/L)

33 

(Y/G)

Audio right 
channel 
sound signal 
from satellite 
radio tuner

Input

ON

Receive audio sig-
nal

38 

(R)

Ground

Satellite radio 
tuner request 
to audio unit

Input

ON

Turn audio unit ON 

5V

39 

(G)

Ground

Audio RX

Input

Operate audio vol-

ume 

40 

(B)

Ground

Audio TX

Output

Operate audio vol-

ume 

Terminal

 (Wire color)

Item

Signal 

input/

output

Condition

Reference value

+

–

Ignition 

switch

Operation

SKIA0177E

SKIA0177E

SKIA0177E

SKIA4403E

SKIA4402E

AV

AUDIO UNIT

AV-31

< ECU DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

75 

(B)

Ground

Amp power 
supply

Output

ON

Turn audio unit ON 

Battery  voltage

76 

(B)

Ground

Main  antenna

Input

ON

Turn audio unit ON 

–

Terminal

 (Wire color)

Item

Signal 

input/

output

Condition

Reference value

+

–

Ignition 

switch

Operation