Nissan Sentra B18 (2020-2025) Service Manual: U2140-87 Can Comm Circuit

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detected condition
U2140-87	CAN COMM CIRCUIT (CAN communication circuit)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	CAN communication signal
		Threshold	Lost communication with ECM
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

• Harness or connector

  (CAN communication line)

• 8CH CAN gateway

• ECM malfunction

FAIL-SAFE

System continue normal control.

Confirmation Procedure

Confirmation Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE

   With CONSULT

   1. Turn ignition switch ON and wait at least 2 seconds or more.

   2. Select “Self Diagnostic Result” mode of “8ch CAN GATEWAY” using CONSULT.

   3. Check DTC.

   Is DTC U2140-87 detected?

   YES >>

   Proceed to DTC Diagnosis Procedure.

   NO-1 >>

   To check malfunction symptom before repair: Intermittent Incident.

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE AGAIN

   1. Turn ignition switch ON.

   2. Erase DTC.

   3. Perform DTC confirmation procedure again. Refer to Confirmation Procedure.

   4. Check DTC.

   Is DTC “U2140-87” detected?

   YES >>

   Perform trouble diagnosis procedure for CAN communication system. Refer to Interview Sheet.

   NO >>

   INSPECTION END