Nissan Pathfinder. Manual - part 404
DLN-58
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
U1000 CAN COMM CIRCUIT
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009177749
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 communicate data but selectively reads required data only.
DTC Logic
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DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “U1000” detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009177751
LAN-20, "Trouble Diagnosis Flow Chart"
DTC
Display item
Malfunction detected condition
Possible cause
U1000
CAN COMM CIRCUIT
4WD control unit is not transmitting/re-
ceiving CAN communication signal for 2
seconds or more.
• CAN communication error
• Malfunction of 4WD control unit