2008 NISSAN TEANA Trans

AV-22
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
STEERING SWITCH SIGNAL B CIRCUIT
STEERING SWITCH SIGNAL B CIRCUIT
DescriptionINFOID:0000000003765597
Transmits the steering switch signal to audio unit.
Diagnosis ProcedureINFOID:0000000003765598
1.CHECK STEERING SWITCH SIGNAL B CIRCUIT
1. Disconnect audio unit connector and spiral cable connector.
2. Check continuity between audio unit harness connector and spiral cable harness connector.
3. Check continuity between audio unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK SPIRAL CABLE
Check spiral cable.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace spiral cable.
3.CHECK AUDIO UNIT VOLTAGE
1. Connect audio unit connector and spiral cable connector.
2. Turn ignition switch ON.
3. Check voltage between audio unit harness connector terminals.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace audio unit.
4.CHECK STEERING SWITCH
1. Turn ignition switch OFF.
2. Check steering switch. Refer to AV-23, "
Component Inspection".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace steering switch.
Audio unit Spiral cable
Continuity
Connector Terminal Connector Terminal
M46 16 M33 31 Existed
Audio unit
—Continuity
Connector Terminal
M46 16 Ground Not existed
(+) (−)
Vo l ta g e Audio unit
Connector Terminal Connector Terminal
M46 16 M46 15 Approx. 5.0 V

AV-24
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
STEERING SWITCH SIGNAL GND CIRCUIT
STEERING SWITCH SIGNAL GND CIRCUIT
DescriptionINFOID:0000000003765600
Transmits the steering switch signal to audio unit.
Diagnosis ProcedureINFOID:0000000003765601
1.CHECK STEERING SWITCH SIGNAL GND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect audio unit connector and spiral cable connector.
3. Check continuity between audio unit harness connector and spiral cable harness connector.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK SPIRAL CABLE
Check spiral cable.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace spiral cable.
3.CHECK GROUND CIRCUIT
1. Connect audio unit connector.
2. Check continuity between audio unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace audio unit.
4.CHECK STEERING SWITCH
1. Turn ignition switch OFF.
2. Check steering switch. Refer to AV-25, "
Component Inspection".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace steering switch.
Audio unit Spiral cable
Continuity
Connector Terminal Connector Terminal
M46 15 M33 33 Existed
Audio unit
—Continuity
Connector Terminal
M46 15 Ground Existed

AV-48
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
MULTI AV SYSTEM
FUNCTION DIAGNOSIS
MULTI AV SYSTEM
System DiagramINFOID:0000000003882699
NOTE:
 The name MULTIFUNCTION SWITCH indicates the integration of PRESET SWITCH and MULTIFUNCTION
SWITCH virtually.
 A radio antenna base integrated with radio antenna amp. is adopted.
 Woofer illustrated in the above figure, integrates two woofers and a woofer amp.
System DescriptionINFOID:0000000003882700
Multi AV system means that the following systems are integrated.
 AV control unit controls by transmitting/receiving data one by one with each unit (slave unit) that configures
them completely as a master unit by connecting between units that configure MULTI AV system with two AV
communication lines (H, L).
 Two AV communication lines (H, L) adopt a twisted pair line that is resistant to noise.
 AV control unit is connected by CAN communication, and it receives data signal from ECM, combination
meter. It computes and displays fuel economy information value with the obtained information. Transmitting/
receiving of data signal is performed by BCM. Also, it transmits the required signal of vehicle setting and
receives the response signal.
JSNIA1431GB
System name System explanation
AUDIO SYSTEMAV- 5 3 , "
System Diagram"
REAR VIEW MONITOR SYSTEMAV- 5 6 , "System Description"
VEHICLE INFORMATION SYSTEM Status of audio, climate control system, fuel economy, mainte-
nance and navigation is displayed.
 AV control unit displays the fuel consumption status while re-
ceiving data signal through CAN communication from ECM and
combination meter.
 AV control unit is connected to BCM via CAN communication
transmitting/receiving for the vehicle settings function.
AUXILIARY INPUT SYSTEM Refer to “AUXILIARY INPUT SYSTEM” shown below.

AV
MULTI AV SYSTEM
AV-49
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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 AV control unit is connected with display unit and serial communication, and it transmits the required signal
of display and display control and receives the response signal from display unit.
NOTE:
AV control unit can perform CONSULT-III self-operating function and on board self-diagnosis.
 CONSULT-III self diagnosis: Refer to AV-68, "
CONSULT-III Function (MULTI AV)".
 On board self diagnosis: Refer to AV-60, "
Diagnosis Description".
AUXILIARY INPUT SYSTEM
 Image and sound can be output from an external device by connecting a device with auxiliary input jacks.
 Operation can be performed with multifunction switch, steering switch and rear control switch. Multifunction
switch and rear control switch transmits operation signal to AV control unit by AV communication.
JSNIA1432GB

AV
MULTI AV SYSTEM
AV-51
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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Component DescriptionINFOID:0000000003882702
Part name Description
AV CONTROL UNIT It is the master unit of the MULTI AV system, and it is connected to each control
unit by communication. It operates each system according to communication
signals from the AV control unit.
 AV control unit includes audio function and vehicle information function.
 It is connected to ECM and combination meter via CAN communication to ob-
tain necessary information for the vehicle information function.
 It is connected to BCM via CAN communication transmitting/receiving for the
vehicle settings function.
 AUX image signal is input from auxiliary jacks.
 Camera image signal is input from camera control unit.
 Composite image (AUX and camera images) signal is output to display unit.
 AUX sound signal is input from the auxiliary jacks.
 Power (signal VCC and inverter VCC) is transmitted to front display unit.
DISPLAY UNIT Display image is controlled by the serial communication from AV control unit.
 It receives the power (signal VCC and inverter VCC) from the AV control unit
and operates.
 RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-
chronizing).
 Composite image (AUX and camera images) signal is input from AV control
unit.
 Synchronize signal (HP, VP) is output to AV control unit.
FRONT SPEAKER Outputs sound signal from front speaker.
 Outputs sound (mid and low range).
REAR SPEAKER Outputs sound signal from rear speaker.
 Outputs sound (mid and low range).
FRONT SQUAWKER Outputs sound signal from front squawker.
 Outputs sound (high and mid range).
MULTIFUNCTION SWITCH Operation panel is equipped with the centralized switch where camera, audio
and auxiliary input operations are integrated.
 The multifunction switch is connected to the preset switch by wiring harness,
and it transmits the operation signal to the preset switch.
PRESET SWITCH Operation panel is equipped with the centralized switch where audio and air
conditioner operations are integrated.
 The preset switch is connected via AV communication, and it transmits the op-
eration signals of the preset switch and multifunction switch.
 The disk ejection operating signal is performed by wiring harness.
CAMERA CONTROL UNIT Camera image signal is input from rear view camera. Camera image signal
output to AV control unit.
 Power supply is transmitted to rear view camera.
 AV control unit recognizes the presence of camera system with camera con-
nection recognition signal.
 Camera control unit is connected via AV communication.
REAR VIEW CAMERA The image of vehicle rear view is transmitted to camera control unit.
 It receives the power supply from the camera control unit and operates.
STEERING ANGLE SENSOR Sensor signal (steering angle) is transmitted to camera control unit.
STEERING SWITCH The operations of audio, etc. can be performed.
 Steering switch signal (operation signal) is output to AV control unit.
AUXILIARY INPUT JACKS The image signal of the auxiliary input is output via the AV control unit to the
display unit.
 The sound signal of the auxiliary input is output via the AV control unit to the
each speaker.

AV-52
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
MULTI AV SYSTEM
REAR CONTROL SWITCH Operations for audio, etc. are possible.
 The rear control switch is connected via AV communication, and it transmits
the operation signals of the rear control switch.
ANTENNA AMP. Radio signal received by glass antenna is amplified and transmitted to AV con-
trol unit.
 Power (antenna amp ON signal) is supplied from AV control unit. Part name Description

AV
AUDIO SYSTEM
AV-53
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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AUDIO SYSTEM
System DiagramINFOID:0000000003882703
NOTE:
The name MULTIFUNCTION SWITCH indicates the integration of PRESET SWITCH and MULTIFUNCTION
SWITCH virtually.
System DescriptionINFOID:0000000003882704
The audio system is equipped with following function. Each function can be operated with the multifunction
switch, preset switch, rear control switch or steering switch. It indicates the operation status of AUDIO to the
display unit.
FUNCTION DESCRIPTION
Operating Signal
Operation of the audio system can be performed via the multifunction switch, preset switch, rear control switch
or steering switch.
 Operating signal is transmitted to AV control unit via AV communication when it is operated by multifunction
switch, preset switch or rear control switch. The CD ejection operating signal is performed by hard-wire.
 Operating signal is transmitted to AV control unit with steering switch signal when it is operated by steering
switch.
Screen Display
 The display switching of the screen is performed by the communication signal between the display unit and
the AV control unit.
 The image signal to display operating condition is performed by RGB image signal, RGB area signal and
RGB image synchronizing signal.
AM/FM Radio Mode
 AM/FM radio tuner is built into AV control unit.
 AM/FM radio wave is received by glass antenna, next it is amplified by antenna amp., and finally it is input to
AV control unit. The FM sub antenna is installed on the rear window glass and the AV control unit is
received.
 Sound signal is input to AV control unit, and AV control unit outputs to each speaker.
CD Mode
 CD function is built into AV control unit.
 AV control unit outputs sound signal to each speaker when CD is inserted to AV control unit.
JSNIA1434GB
Function
AM/FM radio
CD

AV
AUDIO SYSTEM
AV-55
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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Component DescriptionINFOID:0000000003791248
Part name Description
AV CONTROL UNIT The AM/FM receiving function and the CD playing function are equipped.
 Sound signal is transmitted to each speaker.
DISPLAY UNIT Display image is controlled by the serial communication from AV control unit.
 RGB image signal (audio operation condition) is input from AV control unit.
FRONT SPEAKER Outputs sound signal from front speaker.
 Outputs sound (mid and low range).
REAR SPEAKER Outputs sound signal from rear speaker.
 Outputs sound (mid and low range).
FRONT SQUAWKER Outputs sound signal from front squawker.
 Outputs sound (high and mid range).
MULTIFUNCTION SWITCH Each audio operation can be operated.
 The multifunction switch is connected to the preset switch by wiring harness,
and it transmits the operation signal to the preset switch.
PRESET SWITCH Each audio operation can be operated.
 The preset switch is connected via AV communication, and it transmits the op-
eration signals of the preset switch and multifunction switch.
 The disk ejection operating signal is performed by hard-wire.
STEERING SWITCH Each audio operation can be operated.
 Steering switch signal (operation signal) is output to AV control unit.
REAR CONTROL SWITCH Each audio operation can be operated.
 The rear control switch is connected via AV communication, and it transmits
the operation signals of the rear control switch.
ANTENNA AMP. Radio signal received by glass antenna is amplified and transmitted to AV con-
trol unit.
 Power (antenna amp. ON signal) is supplied from AV control unit.