Nissan Sentra B18 (2020-2025) Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Door & Lock :: Dtc/circuit Diagnosis / U2148-87 Can Comm Err (brake Control Unit)

Nissan Sentra B18 (2020-2025) Service Manual: U2148-87 Can Comm Err (brake Control Unit)

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 System Description.

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
U2148-87	CAN comm err (brake control unit) [CAN communication error (brake control unit)]	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

—

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE
1. CONSULT
  1. Ignition switch ON and wait for 2 seconds or more.
  2. Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”.
Is DTC detected?
YES>>
Refer to DTC Diagnosis Procedure.
NO>>
To check malfunction symptom before repair. Refer to Intermittent Incident.
NO>>
Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK CAN COMMUNICATION
1. Check CAN communication. Refer to Trouble Diagnosis Flow Chart.
Is DTC “U2148-87” displayed?
YES >>
Repair or replace the malfunctioning part.
NO >>
Check intermittent incident. Refer to Intermittent Incident.

 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 ...

 U214e-87 Can Comm Err (combination Meter)

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 ...

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