Infiniti FX35 / FX45. Manual - part 165

 

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Infiniti FX35 / FX45. Manual - part 165

 

 

AV-114

< SERVICE INFORMATION >

NAVIGATION SYSTEM

Self-Diagnosis Mode (DCU)

INFOID:0000000001328753

OPERATION PROCEDURE

1.

Start the engine.

2.

Turn the audio system OFF.

3.

While pressing the “4” button, turn the volume control dial clock-
wise or counterclockwise for 30 clicks or more. (When the self-
diagnosis mode is started, a short beep will be heard.)
• Shifting from current screen to previous screen is performed

by pressing “BACK” button.

Mode

Description

Self Diagnosis (DCU)

• Display control unit diagnosis
• Analyzes connection between the display control unit and each unit, and 

operation of each unit.

Self Diagnosis (NAVI)

• NAVI control unit diagnosis (DVD-ROM drive will not be diagnosed when 

no DVD-ROM is in it.).

• Analyzes connection between the NAVI control unit and the GPS anten-

na.

Confirmation/
Adjustment

Display Diagnosis

Color tone and shading of the display control unit-generated image can be 
checked by the display of a color bar and a gray scale.

Vehicle Signals

Diagnosis of signals that are input to display control unit can be performed 
for Vehicle Speed, IGN, Reverse and Light.

Auto Climate Control

Refer to 

ATC-43, "Self-Diagnosis Function"

.

Navigation

Display Diagnosis

Color tone and shading of the NAVI control unit-generated image can be 
checked by the display of a color bar and a gray scale.

Vehicle Signals

Diagnosis of signals that are input to NAVI control unit can be performed for 
Vehicle speed, Lights, Ignition and Reverse.

Navigation

Steering An-
gle
Adjustment

This mode is used to correct difference between actual turning angle of a 
vehicle and turning angle of the vehicle mark on the display.

Speed
Calibration

Under ordinary conditions, the navigation system distance measuring func-
tion will automatically compensate for minute decreases in wheel and tire 
diameter caused by tire wear or low-pressure. Speed Calibration can im-
mediately restore system accuracy in cases such as when distance calibra-
tion is needed because of the use of tire chains.

Error History

Malfunctions that occurred in the past are displayed, along with the number 
of times each has occurred. Time and location when/where the errors oc-
curred are also displayed.

Delete Unit Connection Log

Erase the connection history of unit and error history.

CAN DIAG SUPPOPT MONITOR

The transmitting/receiving of CAN communication can be monitored.

SKIB8642E

NAVIGATION SYSTEM

AV-115

< SERVICE INFORMATION >

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4.

The initial trouble diagnosis screen will be shown, and items
“Self Diagnosis (DCU)”, “Self Diagnosis (NAVI)”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR” will
become selective.

5.

Perform self-diagnosis by selecting the “Self Diagnosis (DCU)”.
• Self-diagnosis screen is displayed, and then self-diagnosis

starts.

• The bar graph visible below self-diagnosis screen displays

progress of the diagnosis.

6.

When the self-diagnosis completes, optional part confirmation
screen will be shown.
• When connection of an optional part is judged error, a screen

to check if the optional part is actually fitted on the vehicle or
not will be shown. When fitted, select the switch of the part on
the screen and press “End”. Then the “SELF DIAGNOSIS”
screen will be shown.

• When the optional part is connected normally, the switch for

the part will not appear on the screen.

7.

On the diagnosis results screen, each unit name and connection
line will be colored according to the diagnosis result, as follows.

NOTE:
• Satellite = Satellite radio tuner
• DCU = Display control unit
• Multifunction switch = A/C and AV switch
• Navigation = NAVI control unit
• GPS = GPS antenna
• If multiple malfunctions occur at the same time for a single unit, the screen switch colors are determined

according to the following order of priority: red > yellow > gray.

SKIB7874E

SKIA4208E

SKIB8673E

Green

: No malfunctioning.

Gray

: Cannot be judged by self-diagnosis results.

Red

: Unit is malfunctioning.

SKIB7875E

AV-116

< SERVICE INFORMATION >

NAVIGATION SYSTEM

8.

Select a switch on the diagnosis results screen, and comments
for the diagnosis results will be shown.

SELF-DIAGNOSIS RESULT

Quick Reference Table

1.

Select the applicable diagnosis number in the quick reference table of diagnosis result.

2.

Confirm the possible malfunction with the diagnosis table, and then perform inspection.

3.

Turn ignition switch OFF and perform self-diagnosis again.

• When A/C and AV switch has a malfunction, the self-diagnosis cannot be started. Refer to 

AV-126, "A/C and

AV Switch Self-Diagnosis Function"

.

• When display has a malfunction, the self-diagnosis cannot be started. Refer to 

AV-128, "All Images Are Not

Displayed"

.

Self-Diagnosis Codes

SKIA4211E

Switch color

Screen switch

Diagnosis 

No.

DCU

Display

Audio Unit

Navigation

GPS

Satellite

Red

×

1

Gray

×

2

×

×

3

×

×

4

×

5

×

6

Diagnosis 

No.

Possible cause

Action to take

1

Display control unit malfunction is detected.

Replace display control unit.

2

Malfunction is detected on communication signal between 
display control unit and display.

1.

Check communication circuit between display control 
unit and display.

2.

Check communication signal between display control 
unit and display.

3.

If the results from the above checkup show no mal-
function, replace either display control unit or display, 
and then start self-diagnosis.

4.

If self-diagnosis results still show any malfunction, re-
place the other unit.

3

• Audio unit power supply circuit malfunction is detected.
• Malfunction is detected on communication signal be-

tween display control unit and audio unit.

1.

Check audio unit power supply circuit.

2.

Check communication circuit between display control 
unit and audio unit.

3.

Check communication signal between display control 
unit and audio unit.

4.

If the results from the above checkup show no mal-
function, replace either display control unit or audio 
unit, and then start self-diagnosis.

5.

If self-diagnosis results still show any malfunction, re-
place the other unit.

NAVIGATION SYSTEM

AV-117

< SERVICE INFORMATION >

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Self-Diagnosis Mode (NAVI)

INFOID:0000000001328754

OPERATION PROCEDURE

1.

Start the engine.

2.

Turn the audio system OFF.

3.

While pressing the “4” button, turn the volume control dial clock-
wise or counterclockwise for 30 clicks or more. (When the self-
diagnosis mode is started, a short beep will be heard.)
• Shifting from current screen to previous screen is performed

by pressing “BACK” button.

4.

The initial trouble diagnosis screen will be shown, and items
“Self Diagnosis (DCU)”, “Self Diagnosis (NAVI)”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR” will
become selective.
NOTE:
Select “Self Diagnosis (DCU)” when “Self Diagnosis (NAVI)” is
not available. Repair malfunctioning part.

4

• NAVI control unit power supply and ground circuit mal-

function is detected.

• Malfunction is detected on communication signal be-

tween display control unit and NAVI control unit.

1.

Check NAVI control unit power supply and ground cir-
cuit.

2.

Check communication circuit between display control 
unit and NAVI control unit.

3.

If the results from the above checkup show no mal-
function, replace either display control unit or NAVI 
control unit, and then start self-diagnosis.

4.

If self-diagnosis results still show any malfunction, re-
place the other unit.

5

GPS antenna connection malfunction is detected.

1.

Check if GPS antenna feeder line is snapped or 
pinched.

2.

If the results from the above checkup show no mal-
function, replace GPS antenna, and then restart self-
diagnosis.

3.

If self-diagnosis results still show any malfunction, re-
place NAVI control unit.

6

• Satellite radio tuner power supply and ground circuit mal-

function is detected.

• Malfunction is detected on communication signal be-

tween audio unit and satellite radio tuner.

1.

Check satellite radio tuner power supply and ground 
circuit.

2.

Check communication circuit between audio unit and 
satellite radio tuner.

3.

Check communication signal between audio unit and 
satellite radio tuner.

4.

If the results from the above checkup show no mal-
function, replace either audio unit or satellite radio tun-
er, and then start self-diagnosis.

5.

If self-diagnosis results still show any malfunction, re-
place the other unit.

Diagnosis 

No.

Possible cause

Action to take

SKIB8642E

SKIB7874E

 

 

 

 

 

 

 

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