Infiniti QX56 (Z62). Manual - part 884

LAN

U1000 CAN COMM CIRCUIT

LAN-113

< DTC/CIRCUIT DIAGNOSIS >

[CAN GATEWAY]

C

D

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000006220585

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with two communication lines (CAN-H and 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-28, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

DTC Logic

INFOID:0000000006220586

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006220587

1.

PERFORM SELF DIAGNOSTIC

1.

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

2.

Check “Self Diagnostic Result”.

Is “U1000: CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

DTC

CONSULT-III display de-

scription

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When CAN gateway cannot communicate 
CAN communication signal continuously for 2 
seconds or more.

CAN communication system

LAN-114

< DTC/CIRCUIT DIAGNOSIS >

[CAN GATEWAY]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000006220588

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with two communication lines (CAN-H and 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-28, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

DTC Logic

INFOID:0000000006220589

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006220590

1.

REPLACE CAN GATEWAY

When DTC “U1010: CONTROL UNIT(CAN)” is detected, replace CAN gateway.

>> Replace CAN gateway. Refer to 

LAN-117, "Removal and Installation"

.

DTC

CONSULT-III display

description

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT(CAN)

When an error is detected during the initial di-
agnosis for CAN controller of CAN gateway.

CAN gateway

LAN

B2600 CONFIG ERROR

LAN-115

< DTC/CIRCUIT DIAGNOSIS >

[CAN GATEWAY]

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B2600 CONFIG ERROR

Description

INFOID:0000000006220591

The CAN gateway requires initial settings to judge necessary information, according to a vehicle specification.

DTC Logic

INFOID:0000000006220592

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006220593

1.

REPLACE CAN GATEWAY

When DTC “B2600: CONFIG ERROR” is detected, replace CAN gateway.

>> Replace CAN gateway. Refer to 

LAN-117, "Removal and Installation"

.

DTC

CONSULT-III display

description

DTC Detection Condition

Probable cause

B2600

CONFIG ERROR
WRONG DATA

When errors are detected in the configuration 
data stored in the CAN gateway.

CAN gateway

CONFIG ERROR
NOT CONFIGURED

When no data are stored in the CAN gateway.

LAN-116

< DTC/CIRCUIT DIAGNOSIS >

[CAN GATEWAY]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000006220594

1.

CHECK FUSE

Check that the following fuse are not blown.

Is the fuse fusing?

YES

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the connector of CAN gateway.

3.

Check voltage between CAN gateway harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between CAN gateway harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Signal name

Fuse No.

Battery power supply

11

Ignition power supply

3

Terminals

Condition

Voltage

(Approx.)

(+)

(

−

)

CAN gateway

Ground

Ignition 

switch

Connector

Terminal

M125

3

OFF

Battery
voltage

9

ON

Battery
voltage

CAN gateway

Ground

Continuity

Connector

Terminal

M125

5

Existed

11