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HOMESERVICE MANUALSNISSAN-DATSUN2012SENTRA SE-RREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - COMPONENT TESTING (QR25DE)IGNITION SIGNALCOMPONENT INSPECTIONIGNITION COIL WITH POWER TRANSISTOR
2012 Nissan-Datsun Sentra SE-R

Ignition Coil With Power Transistor

2012 Nissan-Datsun Sentra SE-RSECTION Ignition Coil With Power Transistor
CAUTION: Perform the following procedure in a place with no combustible objects and good ventilation.
  1. Turn ignition switch OFF.
  2. Disconnect ignition coil harness connector.
  3. Check resistance between ignition coil terminals as follows.
    Terminal No. (Polarity) Resistance Ω [at 25°C (77°F)]
    1 and 2 Except 0 or ∞
    1 and 3 Except 0
    2 and 3
    Fig 1: Checking Resistance Between Ignition Coil Terminals 1, 2 And 3
    G04875504Courtesy of NISSAN NORTH AMERICA, INC.
  4. If NG, replace ignition coil with power transistor. Refer to , "REMOVAL AND INSTALLATION ".

    If OK, go to next step.

  5. Turn ignition switch OFF.
  6. Reconnect all harness connectors disconnected.
  7. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pressure.
    NOTE: Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following procedure.
    • ←: Vehicle front
  8. Start engine.
  9. After engine stalls, crank it two or three times to release all fuel pressure.
  10. Turn ignition switch OFF.
  11. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
  12. Remove ignition coil and spark plug of the cylinder to be checked. Refer to , "REMOVAL AND INSTALLATION ".
  13. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
  14. Connect spark plug and harness connector to ignition coil.
    Fig 2: Identifying IPDM E/R And Fuel Pump Fuse
    G04925143Courtesy of NISSAN NORTH AMERICA, INC.
  15. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - between the edge of the spark plug and grounded metal portion as shown in the figure.
  16. Crank engine for approximately 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.

    Spark should be generated  .

    Fig 3: Identifying Spark Length Between Edge Of Spark Plug And Grounded Metal Portion
    G08185519Courtesy of NISSAN NORTH AMERICA, INC.
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.