Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Anti-Dieseling Solenoid



See Figures 1 and 2

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Fig. Fig. 1: When the anti-dieseling solenoid is de-energized, the solenoid plunger blocks off the primary slow (low speed) system

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Fig. Fig. 2: The anti-dieseling solenoid threads into the side of the carburetor at the mounting location shown

The anti-diesel solenoid is used to prevent engine run-on after the ignition switch is turned OFF . The system uses a valve to shut off the supply of fuel to the primary low speed circuit, when the engine is turned off. The solenoid is normally closed and when energized, the needle assembly retracts, allowing fuel to flow through the primary low speed circuit.


  1. Turn off ignition and disconnect air/fuel ratio solenoid harness connector.
  3. Measure the resistance of the solenoid. The resistance should be 25-45 ohms.

    If the solenoid resistance is within specification, proceed to the next step.
    If the solenoid resistance is out of specification, replace solenoid assembly.

  5. Reconnect solenoid harness connectors.
  7. Disconnect ECM 10 pin connector from control unit and disconnect alternator L terminal.
  9. Turn ignition switch ON and measure voltage between terminal G and ground.

    If battery voltage is not present, check and (if necessary) repair/replace harne