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HOMESERVICE MANUALSNISSAN-DATSUN2012SENTRA SE-RREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSMISSION (CVT)SERVICE INFORMATIONDTC P0725: ENGINE SPEEDDIAGNOSIS PROCEDURE
2012 Nissan-Datsun Sentra SE-R

Diagnosis Procedure

2012 Nissan-Datsun Sentra SE-RSECTION Diagnosis Procedure
  1. CHECK DTC WITH ECM

    With CONSULT 

    1. Turn ignition switch ON.
    2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT. Refer to , "CONSULT FUNCTION (ENGINE) " [MR20DE (California)], , "CONSULT FUNCTION (ENGINE) " [MR20DE (Except California)] and , "CONSULT FUNCTION (ENGINE) " (QR25DE).

    OK or NG 

    OK: GO TO 2.

    NG: Check the DTC detected item. Refer to , "CONSULT FUNCTION (ENGINE) " [MR20DE (California)], , "CONSULT FUNCTION (ENGINE) " [MR20DE (Except California)] and , "CONSULT FUNCTION (ENGINE) " (QR25DE).

  2. CHECK DTC WITH TCM

    With CONSULT 

    1. Turn ignition switch ON.
    2. Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT. Refer to "CONSULT FUNCTION (TRANSMISSION) ".

    OK or NG 

    OK: GO TO 3.

    NG: Check the DTC detected item. Refer to "CONSULT FUNCTION (TRANSMISSION) ".

  3. CHECK INPUT SIGNALS

    With CONSULT 

    1. Start engine.
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
    3. While monitoring "ENG SPEED SIG", check for engine speed change corresponding to "ACC PEDAL OPEN".
    Item name Condition Display value
    ENG SPEED SIG Engine running Closely matches the tachometer reading.
    ACC PEDAL OPEN Released accelerator pedal - Fully depressed accelerator pedal 0.0/8 - 8.0/8

    OK or NG 

    OK: GO TO 4.

    NG: Check ignition signal circuit. Refer to IGNITION SIGNAL [MR20DE (California)], IGNITION SIGNAL [MR20DE (Except California)] and IGNITION SIGNAL (QR25DE).

  4. CHECK DTC

    Perform "DTC CONFIRMATION PROCEDURE ".

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO 5.

  5. CHECK TCM
    1. Check TCM input/output signals. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUE ".
    2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    OK: INSPECTION END 

    NG: Repair or replace damaged parts.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.