Infiniti M35/M45 Y50. Manual - part 598
DTC U1000, U1001 CAN COMMUNICATION LINE
EC-865
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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.