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Nissan Sentra B18 (2020-2025) Service Manual: 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

  1. 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.

  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.

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