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

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

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DTC CONFIRMATION PROCEDURE

DTC CONFIRMATION

CONSULT

1. Ignition switch ON and wait for 2 seconds or more.

2. Select “Self diagnosis result” mode of “INTELLIGENT KEY”.

Is DTC detected?

Refer to Diagnosis Procedure.

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK CAN COMMUNICATION

Check CAN communication. Refer to Trouble Diagnosis Flow Chart.

Is DTC “U2140-87” displayed?

Repair or replace the malfunctioning part.

Check intermittent incident. Refer to Intermittent Incident.