Infiniti G37 Coupe. Manual - part 97

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-141

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

Display Diagnosis

The tint of the color bar indication is as per the following list if RGB signal error is detected.

Vehicle Signals

A comparison check can be made of each actual vehicle signal and
the signals recognized by the system.

Speaker Test

JSNIA0688GB

R (red) signal error

: Light blue (Cyan) tint

G (green) signal error

: Purple (Magenta) tint

B (blue) signal error

: Yellow tint

JSNIA0149GB

Diagnosis item

Display

Vehicle status

Remarks

Vehicle speed

ON

Vehicle speed > 0 km/h (0 MPH)

Changes in indication may be delayed. This is normal.

Vehicle speed = 0 km/h (0 MPH)

Parking brake

ON

Parking brake is applied.

OFF

Parking brake is released.

Lights

ON

Light switch ON

—

OFF

Light switch OFF

Ignition

ON

Ignition switch ON

—

OFF

Ignition switch in ACC position

Reverse

ON

Shift the selector lever to “R” posi-
tion

Changes in indication may be delayed. This is normal.

OFF

Shift the selector lever other than 
“R” position

AV-142

< FUNCTION DIAGNOSIS >

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Select “SPEAKER DIAGNOSIS” to display the Speaker Diagnosis
screen. Press “START and NEXT” to generate a test tone in a
speaker. Press “Start” to generate a test tone in the next speaker.
Press “End” to stop the test tones.
NOTE:
The frequency of test tone emitted from each speaker is as follows.

Climate Control

Refer to “HEATER & AIR CONDITIONING CONTROL SYSTEM” for details.

Error History

The self-diagnosis results are judged depending on whether any error occurs from when “Self-diagnosis” is
selected until the self-diagnosis results are displayed.
However, the diagnosis results are judged normal if an error has occurred before the ignition SW is turned ON
and then no error has occurred until the self-diagnosis start. Check the “Error Record” to detect any error that
may have occurred before the self-diagnosis start because of this situation.
Count up method A
• The counter resets to 0 if an error occurs when IGN switch is turned ON. The counter increases by 1 if the

condition is normal at a next IGN ON cycle. 

• The counter upper limit is 39. Any counts exceeding 39 are ignored. The counter can be reset (no error

record display) with the “Delete log” switch or CONSULT-III.

Count up method B
• The counter increases by 1 if an error occurs when IGN switch is ON. The counter will not decrease even if

the condition is normal at the next IGN ON cycle. 

• The counter upper limit is 50. Any counts exceeding 50 are ignored. The counter can be reset (no error

record display) with the “Delete log” switch or CONSULT-III.

Error item
Some error items may be displayed simultaneously according to the cause. If some error items are displayed
simultaneously, the detection of the cause can be performed by the combination of display items

Tweeter

: 3 kHz

Front speaker

: 300 Hz

Rear speaker

: 1 kHz

JSNIA0150GB

Display type of occur-

rence frequency

Error history display item

Count up method A

CAN communication line, control unit (CAN), AV communication line, control unit (AV communication)

Count up method B

Other than the above

JSNIA0151GB

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-143

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Vehicle CAN Diagnosis

Error item

Description

Possible malfunction factor/Action to take

CAN COMM CIRCUIT

CAN communication malfunction is detect-
ed.

Perform diagnosis with CONSULT-III, and 
then repair the malfunctioning parts accord-
ing to the diagnosis results.
Refer to 

AV-145, "CONSULT - III Function 

(MULTI AV)"

.

CONTROL UNIT (CAN)

CAN initial diagnosis malfunction is detect-
ed.

Replace the AV control unit.

CONTROL UNIT (AV)

AV communication circuit initial diagnosis 
malfunction is detected.

FLASH-ROM Error Of Control Unit

AV control unit malfunction is detected.

CAN Controller Memory Error

Front Display Connection Error

• Display unit power supply and ground 

circuit malfunction is detected.

• Malfunction is detected in communica-

tion circuit between AV control unit and 
display unit.

• Malfunction is detected in communica-

tion signal between AV control unit and 
display unit.

• Display unit power supply and ground 

circuit.

• Communication circuit between AV con-

trol unit and display unit.

SAT Connection Error

• Satellite radio tuner power supply and 

ground circuit malfunction is detected.

• Malfunction is detected in communica-

tion circuit between AV control unit and 
satellite radio tuner.

• Malfunction is detected in communica-

tion signal between AV control unit and 
satellite radio tuner.

• Malfunction is detected in request signal 

circuit between AV control unit and satel-
lite radio tuner.

• Satellite radio tuner power supply and 

ground circuit.

• Communication circuit between AV con-

trol unit and satellite radio tuner.

• Request signal circuit between AV con-

trol unit and satellite radio tuner.

• AV COMM CIRCUIT
• Switches Connection Error

• Multifunction switch power supply and 

ground circuit malfunction is detected.

• Malfunction is detected in AV communi-

cation circuit between AV control unit and 
multifunction switch.

• Malfunction is detected in AV communi-

cation signal between AV control unit and 
multifunction switch.

• Multifunction switch power supply and 

ground circuit.

• AV communication circuit between AV 

control unit and multifunction switch.

• AV COMM CIRCUIT
• iPod Connection Error

• iPod adapter unit power supply and 

ground circuit malfunction is detected.

• Malfunction is detected in AV communi-

cation circuit between AV control unit and 
iPod adapter.

• Malfunction is detected in AV communi-

cation signal between AV control unit and 
iPod adapter.

• iPod adapter power supply and ground 

circuit.

• AV communication circuit between AV 

control unit and iPod adapter unit.

• AV COMM CIRCUIT
• H/F Unit Connection Error

• TEL adapter unit power supply and 

ground circuit malfunction is detected.

• Malfunction is detected in AV communi-

cation circuit between AV control unit and 
TEL adapter unit.

• Malfunction is detected in AV communi-

cation signal between AV control unit and 
TEL adapter unit.

• TEL adapter unit power supply and 

ground circuit.

• AV communication circuit between AV 

control unit and TEL adapter unit.

• AV COMM CIRCUIT
• Switches Connection Error
• iPod Unit Connection Error
• H/F Unit Connection Error

Malfunction is detected in AV communica-
tion circuit between AV control unit and the 
branch point multifunction switch and AV 
control unit.

AV communication circuit between AV con-
trol unit and the branch point multifunction 
switch and AV control unit.

AV-144

< FUNCTION DIAGNOSIS >

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

• CAN communication status and error counter is displayed.
• The error counter displays “OK” if any malfunction was not

detected in the past and displays “0” if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.

• The error counter is erased if reset.

AV COMM Diagnosis

• Displays the communication status between AV control unit (mas-

ter unit) and each unit.

• The error counter displays “OK” if any malfunction was not

detected in the past and displays “0” if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.

• If it resets, the error counter is erased.

Delete Unit Connection Log

Deletes any unit connection records and error records from the AV
control unit memory. (Clear the records of the unit that has been
removed)

Initialize Settings

Initializes the AV control unit memory.

Items

Display (Current)

Malfunction counter

(Past)

Tx (HVAC)

OK / UNKWN

OK / 0 - 39

Rx (ECM)

OK / UNKWN

OK / 0 - 39

Rx (Cluster)

OK / UNKWN

OK / 0 - 39

Rx (BCM)

OK / UNKWN

OK / 0 - 39

Rx (HVAC)

OK / UNKWN

OK / 0 - 39

Rx (USM)

OK / UNKWN

OK / 0 - 39

JSNIA0080GB

Items

Status

(Current)

Counter

(Past)

C Tx(ITM–SW)

OK / UNKWN

OK / 0 - 39

C Rx(PrimarySW–ITM)

OK / UNKWN

OK / 0 - 39

C Rx(BTHF–ITM)

OK / UNKWN

OK / 0 - 39

C Rx(iPod Adpt.–ITM)

OK / UNKWN

OK / 0 - 39

JPNIA0512GB

JSNIA0154GB

JSNIA0155GB