Nissan Rogue (T33) 2021-Present Service Manual: Can Fundamental :: Description
Outline
How to Use This Section
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“CAN FUNDAMENTAL” of LAN Section describes the basic knowledge of the CAN communication system and the method of trouble diagnosis.
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For information peculiar to a Nissan Ariya vehicle and inspection procedure, refer to “CAN”.
System (can Communication)
System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a Nissan Ariya 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.
System (diag on Can)
System Description
SYSTEM DIAGRAM

| Name | Harness | Description |
|---|---|---|
| DDL1 |
Tx Rx |
For communications with the diagnostic tool. (CAN-H and CAN-L are used for controlling) |
| DDL2 | K-LINE | For communications with the diagnostic tool. (CAN-H and CAN-L are used for controlling) |
| Diag on CAN |
CAN-H CAN-L |
For communications with the diagnostic tool. (CAN-H and CAN-L are also used for control and diagnoses.) |
DESCRIPTION
“Diag on CAN” is a diagnosis method which uses the CAN communication line for the communication between the control unit and the diagnostic tool.
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Adas Control Unit 2
List of ECU Reference
ECU Reference
ADAS control unit 2 (Without ProPILOT Assist 2.1)
Reference Value
Fail-safe (ADAS Control Unit 2)
DTC Inspection Priority Chart
DTC Index
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U1cfa Can Comm Circuit
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
U1CFA
00
Lost communication with USM in secondary ECU
(Lost communication with USM in secondary ECU)
Diagnosis condition
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