Infiniti M35/M45 Y50. Manual — part 598

DTC U1000, U1001 CAN COMMUNICATION LINE

EC-865

[VK45DE]

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EC

DTC U1000, U1001 CAN COMMUNICATION LINE

PFP:23710

Description

NBS005B0

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 line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

NBS005B1

*1: This self-diagnosis has the one trip detection logic.
*2: The MIL will not light up for this diagnosis.

DTC Confirmation Procedure

NBS005B2

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

If 1st trip DTC is detected, go to

EC-867, "Diagnostic Procedure"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U1000*

1

1000*

1

CAN communication line

When ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) for 2 seconds or more.

●

Harness or connectors
(CAN communication line is open or
shorted)

U1001*

2

1001*

2

When ECM is not transmitting or receiving CAN
communication signal other than OBD (emission-
related diagnosis) for 2 seconds or more.

EC-866

[VK45DE]

DTC U1000, U1001 CAN COMMUNICATION LINE

Wiring Diagram

NBS005B3

TBWT1011E

DTC U1000, U1001 CAN COMMUNICATION LINE

EC-867

[VK45DE]

C

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EC

Diagnostic Procedure

NBS005B4

Go to

LAN-50, "CAN System Specification Chart"

.

EC-868

[VK45DE]

DTC U1010 CAN COMMUNICATION

DTC U1010 CAN COMMUNICATION

PFP:23710

Description

NBS005B5

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 line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

NBS005B6

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

NBS005B7

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

If DTC is detected, go to

EC-869, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U1010
1010

CAN communication bus

When detecting error during the initial diagnosis of
CAN controller of ECM.

●

ECM

SEF058Y