Nissan Altima (L32) 2007-2012 Service Manual: Microphone signal circuit
Description
Power is supplied to the microphone from the AV control unit. The microphone
transmits voice signals to the
AV control unit.
Diagnosis Procedure
1.CHECK CONTINUITY BETWEEN AV CONTROL UNIT AND MICROPHONE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M46 and microphone connector R7.
3. Check continuity between AV control unit harness connector
M46 (A) terminals 45, 46, 47 and microphone harness connector
R7 (B) terminals 1, 2, 4.
4. Check continuity between AV control unit harness connector
M46 (A) terminals 45, 46, 47 and ground.
Is inspection result OK?
YES >> GO TO 2
NO >> Repair harness or connector.
2.CHECK MICROPHONE VCC VOLTAGE
1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector M46
terminals 46 and 47.
Is inspection result OK?
YES >> GO TO 3
NO >> Replace AV control unit. Refer to AV-437, "Removal and
Installation".
3.CHECK MICROPHONE SIGNAL
1. Connect microphone connector.
2. Check signal between AV control unit harness connector M46
terminals 45 and 47.
Is inspection result OK?
YES >> Replace AV control unit. Refer to AV-437, "Removal and Installation".
NO >> Replace microphone. Refer to AV-456, "Removal and Installation".
Description
When one of the steering wheel audio control switches is pushed, the
resistance in the steering switch circuit
changes depending on which button is pushed.
Diagnosis Procedure
1.CH ...
Description
Rear view camera images are transmitted to the rear view camera control unit
using the camera image signal
circuits.
Diagnosis Procedure
1.CHECK CAMERA IMAGE SIGNAL CIRCUIT CONTINUI ...
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rollover supplemental air bag inflators
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Roof-mounted curtain side-impact and
rollover supplemental air bag
Front seat-mounted side-impact supplemental
air bag
Head restraints/headrests
Front seat belts
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Moonroof (if so equipped)
Power moonroof
The moonroof will only operate when the
ignition switch is placed in the ON position.
The power moonroof is operational for a
period of time, even if the ignition switch is
placed in the AUTO ACC or OFF position. If
the driver's door or the front passenger's
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Booster seats
For additional information on installing a
booster seat in your vehicle, follow the instructions
outlined in this section.
Precautions on booster seats
WARNING
If a booster seat and seat belt are not
used properly, the risk of a child being
injured or killed in a sudden stop or collision
greatly inc ...