Nissan Sentra. Instruction — 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
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
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
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