Nissan Rogue (T33) 2021-Present Service Manual: U2140-87 Can Comm Err (ecm)
DTC Description
DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Ariya vehicle is equipped with many electronic control unit, 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-High line, CAN-Low line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.
DTC DETECTION LOGIC
| DTC No. |
CONSULT screen items (Trouble diagnosis content) | DTC Detection Condition | |
|---|---|---|---|
| U2140–87 |
CAN comm err (ECM) [CAN communication error (ECM)] |
Diagnosis condition | Ignition switch ON |
| Signal (terminal) | CAN communication signal | ||
| Threshold | A/C amp. is not transmitting or receiving CAN communication signal | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
CAN communication system
FAIL-SAFE
—
DTC CONFIRMATION PROCEDURE
PERFORM SELF DIAGNOSIS
CONSULT
-
Ignition switch ON.
-
Select "Self diagnosis result" mode of "HVAC".
-
Check DTC.
Is DTC detected?
YES>>Refer to Diagnosis Procedure.
NO-1>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2>>Confirmation after repair: Inspection End.
Diagnosis Procedure
CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.
>>
Inspection End.
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U0120 Can Communication
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
U0120
00
STR/GEN C/M
(Lost Communication With Starter / Generator Control Module)
Diagnosis condition
Ignition switch ON
Signal (terminal)
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