2008 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.
    TERMINALS RESISTANCE CHART

    Terminal No. (Polarity) Resistance Ξ© [at 25Β°C (77Β°F)]
    1 and 2 Except 0 or ∞
    1 and 3 Except 0
    2 and 3
    Fig 1: Checking Resistance Between Ignition Coil Terminals
    G04875504Courtesy of NISSAN MOTOR CO., U.S.A.
  4. If NG, replace ignition coil with power transistor.

    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-III to release fuel pressure, or fuel pressure applies again during the following procedure.
    • <= : Vehicle front
      Fig 2: Identifying IPDM E/R And Fuel Pump Fuse
      G04925143Courtesy of NISSAN MOTOR CO., U.S.A.
  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.
  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 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 generated.Β 

    Fig 3: Identifying Gap Between Edge Of Spark Plug And Grounded Metal Portion
    G04875164Courtesy of NISSAN MOTOR CO., U.S.A.
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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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