Infiniti G37 Coupe. Manual — part 168
AV
U1206 GPS
AV-425
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U1206 GPS
Description
INFOID:0000000001682753
Replace the AV control unit if this DTC is displayed. Refer to
DTC Logic
INFOID:0000000001558830
Diagnosis Procedure
INFOID:0000000001558831
1.
PERFORM THE SELF-DIAGNOSIS
1.
Delete the self-diagnosis results. Turn ignition switch OFF.
2.
Turn ignition switch ON. Perform the self-diagnosis again.
3.
Check that the DTC is detected again.
Is any DTC detected?
YES
>> Replace AV control unit.
NO
>> The intermittent malfunction caused by strong radio interference can be detected.
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• 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.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, satellite radio and vehicle information functions.
• It is connected to ECM and unified meter and A/C amp. via CAN communica-
tion to obtain necessary information for the vehicle information function.
• It is connected to BCM via CAN communication transmitting/receiving for the
vehicle settings function.
• It inputs the illumination signals that are required for the display dimming con-
trol.
• It inputs the signals for driving status recognition (vehicle speed, reverse and
parking brake).
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U1206
GPS RAM
[U1206]
Internal malfunction of AV control unit (GPS malfunction)
is detected.
Replace AV control unit.
AV-426
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U1207 GPS
U1207 GPS
Description
INFOID:0000000001682754
Replace the AV control unit if this DTC is displayed. Refer to
.
DTC Logic
INFOID:0000000001558833
Diagnosis Procedure
INFOID:0000000001558834
1.
PERFORM THE SELF-DIAGNOSIS
1.
Delete the self-diagnosis results. Turn ignition switch OFF.
2.
Turn ignition switch ON. Perform the self-diagnosis again.
3.
Check that the DTC is detected again.
Is any DTC detected?
YES
>> Replace AV control unit.
NO
>> The intermittent malfunction caused by strong radio interference can be detected.
Part name
Description
AV CONTROL UNIT
• Integrates HDD (hard disk drive) allowing map data and music data to be
stored.
• 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.
• The AV control unit includes the audio, hands-free phone, voice control, navi-
gation, satellite radio and vehicle information functions.
• It is connected to ECM and unified meter and A/C amp. via CAN communica-
tion to obtain necessary information for the vehicle information function.
• It is connected to BCM via CAN communication transmitting/receiving for the
vehicle settings function.
• It inputs the illumination signals that are required for the display dimming con-
trol.
• It inputs the signals for driving status recognition (vehicle speed, reverse and
parking brake).
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Action to take
U1207
GPS RTC
[U1207]
Internal malfunction of AV control unit (GPS malfunction)
is detected.
Replace AV control unit.
AV
U1243 DISPLAY UNIT
AV-427
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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U1243 DISPLAY UNIT
Description
INFOID:0000000001558835
DTC Logic
INFOID:0000000001558836
Diagnosis Procedure
INFOID:0000000001558837
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to
AV-433, "DISPLAY UNIT : Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY COMMUNICATION CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect display unit connector and AV control unit connector.
3.
Check continuity between display unit harness connector terminals 11, 22 and AV control unit harness
connector terminals 70, 71.
4.
Check continuity between display unit harness connector terminals 11, 22 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK COMMUNICATION SIGNAL
1.
Connect display unit connector and AV control unit connector.
2.
Turn ignition switch ON.
3.
Check signal between display unit harness connector terminal 11 and ground.
Part name
Description
DISPLAY UNIT
• Display image is controlled by the serial communication from AV control unit.
• RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-
chronizing). Auxiliary image signal is input from the auxiliary input jack. Cam-
era image signal is input from the camera control unit.
• Synchronize signal (HP, VP) is output to AV control unit.
• Touch panel function can be operated for each system by touching a display
directly.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1243
FRONT DISP CONN
[U1243]
• Display unit power supply and ground circuit malfunc-
tion is detected
• Malfunction is detected in communication circuit be-
tween AV control unit and display unit
• Malfunction is detected in communication signal be-
tween AV control unit and display unit
• Display unit power supply and
ground circuit.
• Communication circuit between AV
control unit and display unit.
11 - 70
: Continuity should exist.
22 - 71
: Continuity should exist.
11, 22 - Ground
: Continuity should not exist.
AV-428
< COMPONENT DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
U1243 DISPLAY UNIT
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector terminal 22 and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace display unit.
Terminal
Condition
Reference value
11 - Ground
Ignition
switch
ON
When adjusting display bright-
ness.
PKIB5039J
Terminal
Condition
Reference value
22 - Ground
Ignition
switch
ON
When adjusting display bright-
ness.
PKIB5039J
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