Ignition control module (ICM) -most commonly known as the igniter or the power transistor.In my experience, the most common component failures, of the ignition system that cause a no-start no-spark condition are:.The ignition system of the Nissan vehicles covered by this article use either a distributor type system or a COP ignition coil system.Without spark, the engine will crank but not start. The ignition system is the one responsible for creating and delivering spark.Here are the automotive systems responsible for spark, fuel, and air: So, to successfully diagnose the cause of the no-start condition, you need to perform specific tests to see if spark is missing, or if fuel is missing, or if the engine doesn't have compression (‘air’). When your Nissan vehicle cranks but does not start, it's because one of these 3 things is missing from the mix. The most essential (and basic) thing you need to know, to find out what's causing your Nissan not to start, is that the internal combustion engine needs 3 things to start and run. Here's a tutorial that'll help: How To Test The Starter Motor (Nissan 2.4L -Frontier, Xterra). If this is the case in your particular situation, I recommend testing the starter motor. This is usually due to a bad starter motor, bad ignition switch, bad neutral safety switch, or the engine is locked up. In other words, the engine doesn't turn over at all. Here's a brief description:Ĭranks But Does Not Start Condition: Means that your Nissan's starter motor is cranking the engine but the engine is not starting.ĭoes Not Crank Condition: Means that the engine is not cranking when you turn the key to crank the engine. Is there a difference between the two? Yes, there's a world of a difference between a no-crank and a no-start condition. I'm sure you've heard the following phrases a few times before: No Start 3: Checking Engine Mechanical Condition.ĭifference Between A No Start And A No Crank Condition.You'll need to use a back probe or a wiring piercing probe to test the signals in the wires. NOTE: Your 2.4L Nissan D21's power transistor harness connector has female metal terminals. 1992-1994 2.4L Nissan D21 Power Transistor Connector NOTE: To further help you in your diagnostic tests, you can find the 1992-1994 2.4L Nissan D21 ignition system wiring diagram here: 1992-1994 2.4L Nissan D21 Pickup Ignition System Wiring Diagram. Each one has a specific job to do and here's a brief description of each: The power transistor (ignition control module) has 3 wires coming out of its connector. If you have already made sure that the ignition coil is not behind the 'no-start no-spark' problem, then proceed. Testing the ignition coil, on the 2.4L Nissan D21 Pickup is super easy! I've written up a tutorial on how to do it and you can find it here: How To Test The Ignition Coil 1992-1994 Nissan D21 Pickup.
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