Nissan Ariya: U2141-87 Can Comm Circuit
Intelligent Key Unit
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 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. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.
DTC DETECTION LOGIC
| DTC No. | CONSULT screen items | DTC Detection Condition | |
|---|---|---|---|
| U2141–87 | CAN communication error (TCM) | Diagnosis condition | Power switch ON |
| Signal (terminal) | CAN communication signal | ||
| Threshold | Intelligent Key unit cannot communicate CAN communication signal | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
CAN communication system
FAIL-SAFE
—
DTC CONFIRMATION PROCEDURE
CHECK SELF-DIAG RESULT
With CONSULT
-
Power switch ON and wait for 2 seconds or more.
-
Select “Self Diagnostic Result” mode of “INTELLIGENT KEY” using CONSULT.
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 “U2141-87” displayed?
YES>>Repair or replace the malfunctioning part.
NO>>Check intermittent incident. Refer to Intermittent Incident.
Automatic Back Door Control Unit
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 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. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.
DTC DETECTION LOGIC
| DTC No. | CONSULT screen items | DTC Detection Condition | |
|---|---|---|---|
| U2141-87 | CAN communication error (TCM) | Diagnosis condition | Power switch ON |
| Signal (terminal) | CAN communication signal | ||
| Threshold | Automatic back door control unit is unable to receive the CAN communications signal from VCM | ||
| Diagnosis delay time | 2 seconds or less | ||
POSSIBLE CAUSE
CAN communication system
FAIL-SAFE
Inhibit automatic back door system all function
DTC CONFIRMATION PROCEDURE
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
-
Power switch ON and wait for 2 seconds or more.
-
Check “Self Diagnostic Result” mode of “AUTOMATIC BACK DOOR” using CONSULT.
Is DTC detected?
YES>>Refer to DTC Diagnosis Procedure.
NO-1>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2>>Confirmation after repair: INSPECTION END
DTC Diagnosis Procedure
CHECK CAN COMMUNICATION
Check CAN communication. Refer to Trouble Diagnosis Flow Chart.
Is DTC “U2141-87” displayed?
YES>>Repair or replace the malfunctioning part.
NO>>Check intermittent incident. Refer to Intermittent Incident.
Nissan Ariya (FE0) 2023-2025 Service & Repair Manual
U2141-87 Can Comm Circuit
Actual pages
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