Infiniti G37 Coupe. Manual — part 163

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-405

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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DATA MONITOR

ALL SIGNALS

• Displays the status of the following vehicle signals inputted into the AV control unit.
• For each signal, actual signal can be compared with the condition recognized on the system.

GPS COMM [U1204]

GPS malfunction is detected.

An intermittent error caused by strong radio
interference may be detected unless any
symptom (GPS reception error, etc.) oc-
curs.
Replace the AV control unit if the malfunc-
tion occurs constantly.

GPS ROM [U1205]

GPS RAM [U1206]

GPS RTC [U1207]

FRONT DISP CONN [U1243]

• Display unit power supply and ground

circuits malfunction is detected.

• Malfunction is detected in communica-

tion circuits 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

circuits.

• Communication circuits between AV con-

trol unit and AV display unit.

GPS ANTENNA CONN [U1244]

GPS antenna connection malfunction is de-
tected.

GPS antenna.

CAMERA CONT CONN [U1250]

Malfunction is detected in camera connec-
tion recognition circuit between AV control
unit and camera control unit.

Camera-connection recognition circuit be-
tween AV control unit and camera control
unit.

XM ANTENNA CONN [U1258]

Poor connection is detected in satellite ra-
dio antenna.

• Satellite radio antenna feeder.
• Satellite radio antenna.

• AV COMM CIRCUIT [U1300]
• INTERNAL COMM [U121F]

• AV control unit power supply and ground

circuits.

• AV control unit malfunction is detected.

AV control unit power supply and ground
circuits.

• AV COMM CIRCUIT [U1300]
• SWITCH CONN [U1240]

• Multifunction switch power supply and

ground circuits malfunction is detected.

• Malfunction is detected in AV communi-

cation circuits 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 circuits.

• AV communication circuit between AV

control unit and multifunction switch.

• AV COMM CIRCUIT [U1300]
• REAR CAMERA LAN CONN [U1252]

• Camera control unit power supply and

ground circuits malfunction is detected.

• Malfunction is detected in AV communi-

cation signal between AV control unit and
camera control unit.

Camera control unit power supply and
ground circuits.

• AV COMM CIRCUIT [U1300]
• IPod CONN [U1254]

• iPod adapter power supply and ground

circuits malfunction is detected

• Malfunction is detected in AV communi-

cation circuits between camera 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

circuits

• AV communication circuits between cam-

era control unit and iPod adapter

• AV COMM CIRCUIT [U1300]
• REAR CAMERA LAN CONN [U1252]
• IPod CONN [U1254]

Malfunction is detected in AV communica-
tion circuits between camera control unit
and the junction of AV control unit and mul-
tifunction switch.

AV communication circuits between cam-
era control unit and the junction of AV con-
trol unit and multifunction switch.

• AV COMM CIRCUIT [U1300]
• SWITCH CONN [U1240]
• REAR CAMERA LAN CONN [U1252]
• IPod CONN [U1254]

Malfunction is detected in AV communica-
tion circuits between AV control unit and the
junction of camera control unit and multi-
function switch.

AV communication circuits between AV
control unit and the junction of camera con-
trol unit and multifunction switch.

Error item

Description

Possible malfunction factor/Action to take

AV-406

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

SELECTION FROM MENU

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

Display Item

Display

Vehicle status

Remarks

VHCL SPD SIG

On

Vehicle speed >0 km/h (0 MPH)

Changes in indication may be delayed. This is
normal.

Off

Vehicle speed =0 km/h (0 MPH)

PKB SIG

On

Parking brake is applied.

Off

Parking brake is released.

ILLUM SIG

On

Block the light beam from the auto
light optical sensor when the light
SW is ON.

—

Off

Expose the auto light optical sensor
to light when the light SW is OFF or
ON.

IGN SIG

On

Ignition switch ON

Off

Ignition switch in ACC position

REV SIG

On

Selector lever in R position

Changes in indication may be delayed. This is
normal.

Off

Selector lever in any position other
than R

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

U1000 CAN COMM CIRCUIT

AV-407

< COMPONENT DIAGNOSIS >

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COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001558788

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 independently). 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-25, "CAN System Specification Chart"

.

DTC Logic

INFOID:0000000001558789

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001558790

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-16, "Trouble Diagnosis Procedure"

.

NO

>> Refer to GI section. Refer to

GI-38, "Intermittent Incident"

.

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when ...

Probable malfunction location

U1000

CAN COMM CIRCUIT

AV control unit is not transmitting or receiving
CAN communication signal for 2 seconds or
more.

CAN communication system.

AV-408

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000001558791

Initial diagnosis of AV control unit.

DTC Logic

INFOID:0000000001558792

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001558793

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.