Nissan Quest E52. Instruction — part 56
AV
STEERING SWITCH SIGNAL A CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT)
AV-103
< DTC/CIRCUIT DIAGNOSIS >
[DISPLAY AUDIO]
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STEERING SWITCH SIGNAL A CIRCUIT (TEL ADAPTER UNIT TO AUDIO
UNIT)
Description
INFOID:0000000009651958
• Transmits the steering switch signal to TEL adapter unit.
• Transmits the steering switch signal to audio unit via TEL adapter unit.
Diagnosis Procedure
INFOID:0000000009651959
1.
CHECK STEERING SWITCH SIGNAL A CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT)
1.
Turn ignition switch OFF.
2.
Disconnect audio unit connector and TEL adapter unit connector.
3.
Check continuity between audio unit harness connector and TEL adapter unit harness connector.
4.
Check continuity between audio unit harness connector and ground.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK AUDIO UNIT VOLTAGE
1.
Connect audio unit connector and TEL adapter unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between audio unit harness connector terminals.
Is inspection result normal?
YES
>> Replace TEL adapter unit. Refer to
AV-118, "Removal and Installation"
NO
>> Replace audio unit. Refer to
AV-112, "Removal and Installation"
Audio unit
TEL adapter unit
Continuity
Connector
Terminal
Connector
Terminal
M92
6
M138
17
Existed
Audio unit
Ground
Continuity
Connector
Terminal
M92
6
Not existed
Probe
Standard
Voltage
(Approx.)
(+)
(
−
)
Audio unit
Connector
Terminal
Connector
Terminal
M92
6
M92
15
0 - 3.4 V
3.3 V
AV-104
< DTC/CIRCUIT DIAGNOSIS >
[DISPLAY AUDIO]
STEERING SWITCH SIGNAL B CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT)
STEERING SWITCH SIGNAL B CIRCUIT (TEL ADAPTER UNIT TO AUDIO
UNIT)
Description
INFOID:0000000009651960
• Transmits the steering switch signal to TEL adapter unit.
• Transmits the steering switch signal to audio unit via TEL adapter unit.
Diagnosis Procedure
INFOID:0000000009651961
1.
CHECK STEERING SWITCH SIGNAL B CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT)
1.
Turn ignition switch OFF.
2.
Disconnect audio unit connector and TEL adapter unit connector.
3.
Check continuity between audio unit harness connector and TEL adapter unit harness connector.
4.
Check continuity between audio unit harness connector and ground.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK AUDIO UNIT VOLTAGE
1.
Connect audio unit connector and TEL adapter unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between audio unit harness connector terminals.
Is inspection result normal?
YES
>> Replace TEL adapter unit. Refer to
AV-118, "Removal and Installation"
NO
>> Replace audio unit. Refer to
AV-112, "Removal and Installation"
.
Audio unit
TEL adapter unit
Continuity
Connector
Terminal
Connector
Terminal
M92
16
M138
18
Existed
Audio unit
Ground
Continuity
Connector
Terminal
M92
16
Not existed
Probe
Standard
Voltage
(Approx.)
(+)
(
−
)
Audio unit
Connector
Terminal
Connector
Terminal
M92
16
M92
15
0 - 3.4 V
3.3 V
AV
STEERING SWITCH SIGNAL GND CIRCUIT (TEL ADAPTER UNIT TO AUDIO
UNIT)
AV-105
< DTC/CIRCUIT DIAGNOSIS >
[DISPLAY AUDIO]
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STEERING SWITCH SIGNAL GND CIRCUIT (TEL ADAPTER UNIT TO AU-
DIO UNIT)
Description
INFOID:0000000009651962
• Transmits the steering switch signal to TEL adapter unit.
• Transmits the steering switch signal to audio unit via TEL adapter unit.
Diagnosis Procedure
INFOID:0000000009651963
1.
CHECK STEERING SWITCH SIGNAL GROUND CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT)
1.
Turn ignition switch OFF.
2.
Disconnect audio unit connector and TEL adapter unit connector.
3.
Check continuity between audio unit harness connector and TEL adapter unit harness connector.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK GROUND CIRCUIT
1.
Connect audio unit connector.
2.
Check continuity between audio unit harness connector and ground.
Is inspection result normal?
YES
>> Replace TEL adapter unit. Refer to
AV-118, "Removal and Installation"
NO
>> Replace audio unit. Refer to
AV-112, "Removal and Installation"
Audio unit
TEL adapter unit
Continuity
Connector
Terminal
Connector
Terminal
M92
15
M138
19
Existed
Audio unit
Ground
Continuity
Connector
Terminal
M92
15
Existed
AV-106
< SYMPTOM DIAGNOSIS >
[DISPLAY AUDIO]
AUDIO SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
AUDIO SYSTEM SYMPTOMS
Symptom Table
INFOID:0000000009651964
AUDIO SYSTEM
RELATED TO USB
NOTE:
Check that there is no malfunction of USB equipment main body before performing a diagnosis.
iPod
®
is a trademark of Apple inc., registered in the U.S. and other countries.
RELATED TO CAMERA
Symptoms
Check items
Possible malfunction location / Action to take
Audio unit does not start.
—
Audio unit power supply and ground circuit. Refer to
"AUDIO UNIT : Diagnosis Procedure"
.
Audio sound is not heard or vol-
ume is small.
Sound is not heard only from the
specific places.
Sound signal circuit of malfunctioning system.
No sound comes out or the level
of the sound is low.
No sound from all speakers.
Audio unit power supply and ground circuit. Refer to
"AUDIO UNIT : Diagnosis Procedure"
.
Only a certain speaker (front right,
front left, rear right, or rear left, etc.)
does not output sound.
• Poor connector connection of speaker.
• Sound signal circuit malfunction between audio unit and
speaker.
• Malfunction in speaker.
• Malfunction in audio unit.
Noise is mixed with audio.
Noise comes out from all speakers.
Malfunction in audio unit.
Noise comes out only from a certain
speaker (front right, front left, rear
right, or rear left, etc.).
• Poor connector connection of speaker.
• Sound signal circuit malfunction between audio unit and
speaker.
• Malfunction in speaker.
• Poor installation of speaker (e.g. backlash and looseness)
• Malfunction in audio unit.
Noise is mixed with radio only
(when the car hits a bump or while
driving over bad roads).
Poor connector connection of antenna or antenna feeder.
Radio is not received or poor re-
ception.
• Other audio sounds are normal.
• Any radio cannot be received or
poor reception is caused even af-
ter moving to a service area with
good reception (e.g. a place with
clear view and no obstacles gen-
erating external noises).
• Antenna amp. ON signal circuit malfunction.
• Poor connector connection of antenna or antenna feeder.
Satellite radio is not received.
It change to satellite radio mode.
• Antenna feeder (satellite radio)
• Satellite antenna (antenna base)
It does not change to satellite radio
mode.
Audio unit
Refer to
AV-112, "Removal and Installation"
Symptoms
Check items
Possible malfunction location / Action to take
iPod
®
or USB memory can not
be recognized.
—
• USB harness malfunction.
• USB connector malfunction.
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