Infiniti FX35 / FX45. Manual - part 156

AV-78

< SERVICE INFORMATION >

INTEGRATED DISPLAY SYSTEM

4.

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

5.

Select “CAN DIAG SUPPORT MONITOR”.

6.

The transmitting/receiving of CAN communication can be moni-
tored.

NOTE:
Counter shows the status of CAN communication.

A/C and AV Switch Self-Diagnosis Function

INFOID:0000000001328726

Performing self-diagnosis makes it possible to check operation of A/C and AV switch indicator (LED) and other
switch.

STARTING THE SELF-DIAGNOSIS MODE

1.

Turn ignition switch from OFF to ACC.

2.

Within 10 seconds press and hold the switches “1” and “6”
simultaneously for 3 seconds.

DIAGNOSIS FUNCTION 

The following are checked:

• All the indicators (LED) in the A/C and AV switch.
• Continuity of the switches by sounding the buzzer when the A/C and AV switch and audio steering wheel

switch is pressed.

• Continuity of harness between A/C and AV switch and audio steering wheel switch.
NOTE:

SKIB7871E

Item

Content

Error counter

(Reference value)

CAN_COMM

OK/NG

0 - 50

CAN_CIRC_1

OK/UNKWN

0 - 50

CAN_CIRC_2

OK/UNKWN

0 - 50

CAN_CIRC_3

OK/UNKWN

0 - 50

CAN_CIRC_4

OK/UNKWN

0 - 50

CAN_CIRC_5

OK/UNKWN

0 - 50

CAN_CIRC_6

OK/UNKWN

0 - 50

CAN_CIRC_7

OK/UNKWN

0 - 50

CAN_CIRC_8

OK/UNKWN

0 - 50

CAN_CIRC_9

OK/UNKWN

0 - 50

SKIA4288E

SKIB8744E

INTEGRATED DISPLAY SYSTEM

AV-79

< SERVICE INFORMATION >

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A

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AV

N

O

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Rear window defogger switch operation is not checked  (No beep sound even under normal status).

EXITING THE SELF-DIAGNOSIS MODE

• Turn ignition switch OFF.

CAN Communication Check

INFOID:0000000001328727

1.

CHECK MONITOR DESCRIPTION

1.

Start self-diagnosis of DCU. Refer to 

AV-73, "Self-Diagnosis Mode (DCU)"

.

2.

Select “CAN DIAG SUPPORT MONITOR”. Refer to 

AV-77,

"CAN Diagnostic Support Monitor"

.

3.

Record each item display description (OK/NG/UNKWN) displayed on the following CAN DIAG SUPPORT
MONITOR Check Sheet.

CAN DIAG SUPPORT MONITOR Check Sheet

>> After filling in CAN DIAG SUPPORT MONITOR Check Sheet, Go to 

LAN-43, "CAN System Spec-

ification Chart"

.

Unable to Operate System with A/C and AV Switch

INFOID:0000000001328728

Symptom: Unable to operate A/C system and audio system with A/C and AV switch. (Unable to start self-diag-
nosis.)

1.

CHECK CONDITION

1.

Turn ignition switch ON.

2.

Check if an image is displayed on the screen.

Is an image displayed on the screen?

YES

>> GO TO 2.

NO

>> Repair malfunctioning part. Refer to 

AV-80, "All Images Are Not Displayed"

.

2.

SELF-DIAGNOSIS OF A/C AND AV SWITCH

Start self-diagnosis of A/C and AV switch, and check the self-diagnosis result. Refer to 

AV-78, "A/C and AV

Switch Self-Diagnosis Function"

.

OK or NG

Item

 content

Error counter

(Reference value)

Normal condition

Error (Example)

CAN_COMM

OK

NG

0 - 50

CAN_CIRC_1

OK

UNKWN

0 - 50

CAN_CIRC_2

OK

UNKWN

0 - 50

CAN_CIRC_3

OK

UNKWN

0 - 50

CAN_CIRC_4

OK

UNKWN

0 - 50

CAN_CIRC_5

OK

UNKWN

0 - 50

CAN_CIRC_6

OK

UNKWN

0 - 50

CAN_CIRC_7

OK

UNKWN

0 - 50

CAN_CIRC_8

OK

UNKWN

0 - 50

CAN_CIRC_9

UNKWN

UNKWN

0 - 50

PKIB6080E

Diagnosis item

Screen display

Diagnosis item

Screen display

CAN_COMM

OK

NG

CAN_CIRC_5

OK

UNKWN

CAN_CIRC_1

OK

UNKWN

CAN_CIRC_6

OK

UNKWN

CAN_CIRC_2

OK

UNKWN

CAN_CIRC_7

OK

UNKWN

CAN_CIRC_3

OK

UNKWN

CAN_CIRC_8

OK

UNKWN

CAN_CIRC_4

OK

UNKWN

CAN_CIRC_9

OK

UNKWN

AV-80

< SERVICE INFORMATION >

INTEGRATED DISPLAY SYSTEM

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

CHECK A/C AND AV SWITCH POWER SUPPLY AND GROUND CIRCUIT

1.

Check voltage between A/C and AV switch harness connector
terminals and ground.

2.

Turn ignition switch OFF. 

3.

Disconnect A/C and AV switch connector.

4.

Check continuity between A/C and AV switch harness connector
M64 terminal 5 and ground.

OK or NG

OK

>> Replace A/C and AV switch.

NG

>> Repair harness or connector.

4.

CHECK HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect display control unit and A/C and AV switch connectors.

3.

Check continuity between display control unit harness connector
(A) M76 terminals 28, 30 and A/C and AV switch harness con-
nector (B) M64 terminals 6, 8.

4.

Check continuity between display control unit harness connector
(A) M76 terminals 28, 30 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair harness or connector.

5.

CHECK A/C AND AV SWITCH AND DISPLAY CONTROL UNIT

1.

Replace A/C and AV switch or display control unit.

2.

Make sure that A/C system and audio system can be operated by A/C and AV switch.

OK or NG

OK

>> INSPECTION END

NG

>> Replace the other unit.

All Images Are Not Displayed

INFOID:0000000001328729

Symptom: RGB image is not displayed.

1.

CHECK CONDITION

Terminals

OFF

ACC

ON

(+)

(–)

Connector

Terminal 

M64

1

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

2

0  V

Battery 
voltage

Battery 
voltage

5 – Ground

: Continuity should exist.

SKIB7836E

SKIB7837E

28 – 6

: Continuity should exist.

30 – 8

: Continuity should exist.

28, 30 – Ground

: Continuity should not exist.

SKIB7838E

INTEGRATED DISPLAY SYSTEM

AV-81

< SERVICE INFORMATION >

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AV

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When operating audio and air conditioner, make sure that they operate correctly.

Do audio and air conditioner operate normally?

YES

>> GO TO 2.

NO

>> GO TO 5.

2.

CHECK DISPLAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display connector.

3.

Check continuity between display harness connector M63 termi-
nal 1 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3.

CHECK HARNESS

1.

Disconnect display control unit connector.

2.

Check continuity between display control unit harness connector
(A) M75 terminals 2, 4, 5, 7 and display harness connector (B)
M63 terminals 2, 3, 13, 14.

3.

Check continuity between display control unit harness connector
(A) M75 terminals 2, 4 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

4.

 CHECK DISPLAY POWER SUPPLY AND GROUND CIRCUIT (INVERTER AND SIGNAL)

1.

Connect display control unit and display connectors.

2.

Turn ignition switch ON.

3.

Check voltage between display control unit harness connector
M75 terminals 2 and 5.

1 – Ground

: Continuity should exist.

SKIB7839E

2 – 2

: Continuity should exist.

4 – 3

: Continuity should exist.

5 – 13

: Continuity should exist.

7 – 14

: Continuity should exist.

2, 4 – Ground

: Continuity should not exist.

SKIB7840E

2 – 5

: Approx. 9 V

SKIB7841E