Nissan Xterra. Manual - part 134
U1000 CAN COMM CIRCUIT
BRC-193
< DTC/CIRCUIT DIAGNOSIS >
[TYPE 2]
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U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009482828
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.
DTC Logic
INFOID:0000000009482829
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009482830
1.
CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect the ABS actuator and electric unit (control unit) connector.
3. Check the terminals for deformation, disconnection, looseness, and so on. If there is a malfunction, repair
or replace the terminals.
4. Reconnect connector and perform self-diagnosis. Refer to
BRC-145, "CONSULT Function (ABS)"
Is “CAN COMM CIRCUIT” displayed in self-diagnosis display items?
YES
>> Print out the self-diagnostic results, and refer to
LAN-14, "Trouble Diagnosis Flow Chart"
NO
>> Connector terminal is loose, damaged, open, or shorted.
DTC
Display item
Malfunction detected condition
Possible cause
U1000
CAN COMM CIRCUIT
When ABS actuator and electric unit (control unit) is not
transmitting or receiving CAN communication signal for 2
seconds or more.
• CAN communication line
• ABS actuator and electric unit
(control unit)