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
NO
>> Replace audio unit. Refer to
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]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
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]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
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
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