Nissan Sentra B18 (2020-2025) Service Manual: U0131 Can Communication

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / U0131 Can Communication

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U0131	Lost communication (EPS C/U) (Lost Communication With Power Steering Control Module)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	When ECM is not receiving CAN communication signal of OBD (emission-related diagnosis) with EPS.
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

Harness or connectors (CAN communication line is open or shorted.)
EPS control module

FAIL-SAFE

Engine Control System

Not applicable

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check DTC.
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

DTC Diagnosis Procedure

Perform trouble diagnosis of CAN communication system. Refer to Trouble Diagnosis Flow Chart.

U012e Can Communication

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

Other materials:

P1553 Battery current sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P1553 BAT CURRENT SENSOR (Battery current sensor) The signal voltage transmitted from the sensor to ECM is higher than the amount ...

System Description
System Description SYSTEM DIAGRAM Component Function Trunk lid opener switch Transmit trunk lid open switch signal to ...

Warning/Indicator light
Warning/Indicator light (red) or Brake warning light Charge warning light Engine oil pressure warning light Malfunction Indicator Light (MIL) (if so equipped) Master warning light Seat belt warning light and chime Supplemental air bag warning light Warn ...