Infiniti FX35, FX50 (S51). Manual - part 153

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-385

< SYSTEM DESCRIPTION >

[NAVIGATION (TWIN MONITOR)]

A Connecting Cable Between Units Is Displayed In Yellow.

CONFIRMATION/ADJUSTMENT MODE

Start the diagnosis function and select “Confirmation/Adjustment”. The confirmation/adjustment mode
indicates where each item can be checked or adjusted.

Screen switch

Description

Possible malfunction location / Action to

take

Control Unit

Malfunction is detected in AV control unit
power supply and ground circuits.

Check AV control unit power supply and
ground circuits. When detecting no mal-
function in those components, replace AV
control unit.

Rear Display

When either one of the following items are
detected:
• rear display unit power supply and

ground circuits are malfunctioning.

• serial communication circuits between

around view monitor control unit and vid-
eo distributor are malfunctioning.

• Rear display unit power supply and

ground circuits are malfunctioning.

• serial communication circuits between

around view monitor control unit and vid-
eo distributor are malfunctioning.

Area with yellow connection lines

Description

Possible malfunction location / Action to

take

Control unit

⇔

Front Display

Malfunction is detected in serial communi-
cation circuits between AV control unit and
front display unit.

Serial communication circuits between AV
control unit and front display unit.

Control unit

⇔

GPS Antenna

GPS antenna connection malfunctions de-
tected.

GPS antenna

Control unit

⇔

SAT Antenna

Satellite antenna connection malfunctions
detected.

Satellite radio antenna

Control unit

⇔

Around view

• around view monitor control unit power

supply and ground circuits are malfunc-
tioning.

Around view monitor control unit power
supply and ground circuits.

Around view

⇔

Sonar

When either one of the following items are
detected:
• sonar control unit power supply and

ground circuits are malfunctioning.

• AV communication circuits between AV

control unit and sonar control unit are
malfunctioning.

• Sonar control unit power supply and

ground circuits.

• AV communication circuits between AV

control unit and sonar control unit.

Control unit

⇔

Video Dist

When either one of the following items are
detected:
• video distributor power supply and

ground circuits are malfunctioning.

• AV communication circuits between

around view monitor control unit and vid-
eo distributor are malfunctioning.

• Video distributor power supply and

ground circuits.

• AV communication circuits between

around view monitor and video distribu-
tor.

Control unit

⇔

Around view

Control unit

⇔

Video Dist

AV communication circuits between around
view monitor control unit and multifunction
switch are malfunctioning.

AV communication circuits between around
view monitor control unit and multifunction
switch.

AV-386

< SYSTEM DESCRIPTION >

[NAVIGATION (TWIN MONITOR)]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Select each switch on the “Confirmation/Adjustment Mode”
screen to display the relevant trouble diagnosis screen. Press
the “Back” switch to return to the initial Confirmation/Adjustment
Mode screen.

Display Diagnosis

Vehicle Signals

JSNIA2175ZZ

JSNIA2176GB

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-387

< SYSTEM DESCRIPTION >

[NAVIGATION (TWIN MONITOR)]

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

Climate Control

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

Navigation

STEERING ANGLE ADJUSTMENT
The steering angle output value detected with the gyroscope is
adjusted.

SPEED CALIBRATION

JSNIA2177ZZ

Diagnosis item

Display

Vehicle status

Remarks

Vehicle speed

Vehicle speed > 0 km/h (0 MPH)

Changes in indication may be delayed. This is normal.

OFF

Vehicle speed = 0 km/h (0 MPH)

Parking brake

Parking brake is applied.

OFF

Parking brake is released.

Lights

Light switch ON

—

OFF

Light switch OFF

Ignition

Ignition switch ON

—

OFF

Ignition switch in ACC position

Reverse

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

SIDE VIEW SW

—

This item is displayed, but cannot be monitored.

ROOM LAMP

After opening any door; 5 seconds.

Check 10 seconds later, after closing all doors.

OFF

Except for above.

JSNIA2179ZZ

AV-388

< SYSTEM DESCRIPTION >

[NAVIGATION (TWIN MONITOR)]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

During normal driving, distance error caused by tire wear and tire
pressure change is automatically adjusted for by the automatic dis-
tance correction function. This function, on the other hand, is for
immediate adjustment, in cases such as driving with tire chain fitted
on tires.

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 switch 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.
The error record displays the time and place of the most recent occurrence of that error. However, take note of
the following points.
• If there is a malfunction with the GPS antenna circuit board in the AV control unit, the correct date and time

of occurrence may not be able to be displayed.

• Place of the error occurrence is represented by the position of the current location mark at the time an error

occurred. If current location mark has deviated from the correct position, then the place of the error occur-
rence cannot be located correctly.

• The frequency of occurrence is displayed in a count up manner. The actual count up method differs depend-

ing on the error item.

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

JSNIA2180ZZ

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)

Count up method B

Other than the above

JPNIA1788GB

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