Nissan Rogue (T33) 2021-Present Service Manual: Dtc/circuit Diagnosis :: 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 | Transmission error or reception error | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
CAN communication system
FAIL-SAFE
—
DTC CONFIRMATION PROCEDURE
DTC CONFIRMATION
CONSULT
-
Ignition switch ON and wait for 2 seconds or more.
-
Select “Self diagnosis result” mode of “INTELLIGENT KEY”.
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
Check CAN communication. Refer to Trouble Diagnosis Flow Chart.
Is DTC “U2140-87” displayed?
YES>>Repair or replace the malfunctioning part.
NO>>Check intermittent incident. Refer to Intermittent Incident.
Other materials:
Ecu Diagnosis Information. Hands Free Sensor Control Unit
Reference Value
TERMINAL LAYOUTPHYSICAL VALUES
Terminal No.
(Wire color) Description Condition
Voltage
(Approx.)
(+) (–) Signal name Input/Output
1
(GR)
Ground
Serial communication
Input/Output
Ignition switch ON
2
(L)
Ground
Power supply (BAT)
...
Bose Speaker Amp.
Reference Value
VALUES ON THE DIAGNOSIS TOOLNOTE:
The following table includes information (items)
inapplicable to this Nissan Ariya vehicle. For information (items)
applicable to this vehicle, refer to CONSULT display items.
Monitor Item Condition Value/Status
Active sound control oper ...
If your vehicle overheats
WARNING
Never continue driving if your vehicle overheats — this can lead to engine failure or even a vehicle fire.
Never open the hood if steam is coming out.
Never remove the radiator or coolant reservoir cap when the engine is hot. Pressurized coolant can spray out and cause serious ...