Nissan Sentra B18 (2020-2025) Service Manual: Dtc Description

Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Body Control System :: Dtc/circuit Diagnosis / U2140-87 Can Comm Err (ecm) / Dtc Description

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Sentra vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Sentra 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 second or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

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U2140-87 Can Comm Err (ecm)

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Dtc Confirmation Procedure

DTC Confirmation Procedure DTC CONFIRMATION CONSULT Ignition switch ON and wait for 2 seconds or ...

Other materials:

Does not stop fully-open or fullyclosed position
Diagnosis procedure 1. Perform initialization procedure Perform initialization procedure. Refer to RF-18, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement". Is the inspection result normal? YES >> Inspection End. NO >> Perform basic ins ...

Dtc/circuit diagnosis
U1000 can comm circuit DTC Logic Dtc detection logic Consult display Dtc detection condition Possible cause Can comm circuit [u1000] Av control unit is not transmitting or receiving can communication signal for 2 seconds or more. CAN communication system. ...

Dtc Diagnosis Procedure
DTC Diagnosis Procedure Note: The Signal Tech II Tool [– (NI-50190)] can be used to perform the following functions: Refer to the Signal Tech II User Guide for additional information. Activate and display TPMS sensor IDs Display tire pressure reported ...