2011 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Ignition Coil With Power Transistor

CAUTION: Do the following procedure in the place where ventilation is good without the combustible.
  1. Turn ignition switch OFF.
  2. Disconnect ignition coil harness connector.
  3. Check resistance between ignition coil terminals as follows.
    RESISTANCE SPECIFICATION CHART

    Terminal No. (Polarity) Resistance [at 25Β°C (77Β°F)]
    1 and 2 Except 0 or ∞Ω
    1 and 3 Except 0 Ξ©
    2 and 3
  4. If NG, replace ignition coil with power transistor. Refer to IGNITION COIL, SPARK PLUG AND ROCKER COVER .

    If OK, go to next step.

  5. Turn ignition switch OFF.
  6. Reconnect all harness connectors disconnected.
    Fig 1: Checking Resistance Between Ignition Coil Terminals
    G07140259Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pressure.
    NOTE: Do not use CONSULT-III 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.
    Fig 2: Location Of IPDM E/R And Fuel Pump Fuse
    G07140260Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove ignition coil and spark plug of the cylinder to be checked.
  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.
  15. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as shown in the figure.
  16. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.

    Spark should be generatedΒ  .

    CAUTION:
    • Do not approach to the spark plug and the ignition coil within 50 cm. Be careful not to get an electrical shock while checking, because the electrical discharge voltage becomes 20 kV or more.
    • It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
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When to See a Mechanic

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

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

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