Nissan Rogue (T33) 2021-Present Service Manual: Dtc/circuit Diagnosis :: U0073-00 Control Module Comm Bus a Off

Nissan Rogue (T33) 2021-Present Service Manual / Electrical & Power Control :: Body Control System / Dtc/circuit Diagnosis :: U0073-00 Control Module Comm Bus a Off

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
U0073-00

Control module comm Bus A Off

(Control module communication bus A Off) 		Diagnosis condition Ignition switch is ON.
Signal (terminal) CAN communication signal
Threshold BCM 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

CONSULT

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

  2. Select “Self diagnosis result” mode of “BCM”.

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 SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

Inspection End.

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