AT-190
[RE4F04B]
DTC U1000 CAN COMMUNICATION LINE
Revision: November 2006
2006 Altima
DTC U1000 CAN COMMUNICATION LINE
PFP:23710
Description
ECS00990
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
ECS00991
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code A/T COMM LINE or U1000 with CONSULT-II and 12th judgement flicker without
CONSULT-II is detected when TCM cannot communicate to other control unit.
Possible Cause
ECS00992
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation Procedure
ECS00993
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF”
and wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Turn ignition switch to “ON” position. (Do not start engine.)
2.
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3.
Start engine and wait for at least 6 seconds.
4.
If DTC is detected, go to
AT-193, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II”.
WITHOUT CONSULT-II
1.
Turn ignition switch "ON".
BCIA0030E
BCIA0031E
