Nissan Teana J32. Manual - part 54

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-71

< FUNCTION DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

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Allows the technician to select which vehicle signals should be displayed and displays the status of the
selected vehicle signals.

Item to be selected

Description

VHCL SPD SIG

The same as when “ALL SIGNALS” 
is selected.

PKB SIG

ILLUM SIG

IGN SIG

REV SIG

AV-72

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000003882713

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each
control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to 

LAN-22, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000003882714

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003882715

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “Self Diagnostic Result” of “MULTI AV”. 

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to “LAN system”. Refer to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to GI section. Refer to 

GI-35, "Intermittent Incident"

.

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when...

Probable malfunction location

U1000

CAN COMM CIRCUIT

When AV control unit is not transmitting or re-
ceiving CAN communication signal for 2 sec-
onds or more.

CAN communication system

AV

U1010 CONTROL UNIT (CAN)

AV-73

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

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U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000003882716

Initial diagnosis of AV control unit.

DTC Logic

INFOID:0000000003882717

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003882718

1.

REPLACE AV CONTROL UNIT

When DTC U1010 is detected, replace AV control unit.

>> INSPECTION END

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when...

Probable malfunction location

U1010

CONTROL UNIT (CAN)

CAN initial diagnosis malfunction is detected.

AV control unit

AV-74

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

U1310 AV CONTROL UNIT

U1310 AV CONTROL UNIT

Description

INFOID:0000000003882719

Replace the AV control unit if this DTC is displayed. Refer to 

AV-170, "Removal and Installation"

.

DTC Logic

INFOID:0000000003882720

DTC DETECTION LOGIC

Part name

Description

AV CONTROL UNIT

• 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.

• AV control unit includes audio function and vehicle information function.
• It is connected to ECM and combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• AUX image signal is input from auxiliary jacks.
• Camera image signal is input from camera control unit.
• Composite image (AUX and camera images) signal is output to display unit.
• AUX sound signal is input from the auxiliary jacks.
• Power (signal VCC and inverter VCC) is transmitted to front display unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1310

CONTROL UNIT (AV)
[U1310]

AV communication circuit initial diagnosis malfunction is 
detected.

Replace AV control unit.