How To Test Ignition Control Module With Multimeter

How To Test Ignition Control Module With Multimeter. Have you observed any concerns with your vehicle’s engine productivity? Is your car’s engine stalling? Will your car suddenly stop working? Or will your vehicle’s engine fail to start? If this is the case, your engine ignition control module is most likely broken or failing. This condition does not necessitate panic, as I will walk you through how to test your ignition module.

How To Test Ignition Control Module With Multimeter

how to test ignition control module with multimeter

The ignition module, also known as the ESC module, works with your car’s computers to time your engine’s ignition system for maximum performance and efficiency.

Considering the vast majority of us have little or no prior familiarity with engines, we must first verify ignition modules utilizing these easy methods before learning how to test an ignition module.

Accessories to Use

A multimeter is a tool that can be used to measure.

There are two different types of multimeters:

  1. Analog Multimeters

Analog multimeters existed before the invention of the digital multimeter. Although they are a little tough to read, they are the cheapest multimeters.

  1. Multimeter (digital)

This multimeter is user-friendly and the most widely used multimeter on the market today.

Steps To Test  Ignition Control Module with Multimeter

Follow the easy steps.

Check For Sparks

check for sparks

The following strategies can be used to achieve this:

  • Taking out one of your spark plugs
  • Then, insert any old spark plug at the end of your plug boot, insert any old spark plug.
  • Make sure your vehicle’s spark plug is on top of any metal surfaces on your engine when doing this.
  • Check for any sparks that may occur in the inserted old spark plug by cranking your vehicle’s engine.
  • There is a concern with your ignition if there is no spark.
  • After this first operation, the multimeter will be helpful in the following processes, making sure it’s in good working order. This ensures accurate readings and prevents errors.

Check Voltage At Coils

Positive and negative terminals are usually found on coils. The procedures to be followed in this stage are as follows:

  • While your car’s ignition key is switched on, check for voltage in the positive terminal of your vehicle coil. This will necessitate connecting the red lead of the multimeter to the negative terminal of your vehicle’s coil.
  • After that, connect the black lead to the battery’s negative terminal.
  • The ignition key must be turned on and left in the “runs” position.
  • After that, your multimeter should be able to read the voltage on the positive terminal of your battery. If there is no voltage present, there is an issue with the ignition switch or the ignition wire circuits.

Locate The Positive Wires

The initial step in this process is to:

  • The positive (+) ignition module wire must be located.
  • Turn your car’s ignition key to the run position, but not start the engine.
  • With the red lead of the multimeter, pierce the positive ignition module wire in your car. A battery voltage readout should be on the wire. If this doesn’t happen, check for open circuits between the wires and the ignition switch, and no battery voltage reading appears.

Locate the Negative Wires

  • The negative (-) ignition module wire will be the first to locate.
  • With the red lead of the multimeter, pierce the negative ignition module wire in your car.
  • Disconnect the distributor cap from your car, but don’t remove the spark plug wires.
  • The next step will be to rotate the distributor center shaft with your hand or by cranking the engine of your car. While your car’s engine is running or the rotor is being turned by hand, you’ll need to keep an eye on the distributor rotor.

Multimeters Reading

The voltage value on the multimeter should be within 0 and the battery voltage. If the multimeter reading does not range between zero and the battery voltage when your car’s distributor turns, the next step is to replace the ignition modules.


This article covered everything about How to Test Ignition Control Module with a Multimeter. Checking your ignition module is a straightforward procedure that only takes the essential instruments.

A sensor inside the distributor sends a signal to the module. The movement is then utilized to activate the ignition coil, which provides the spark plugs with energy.

The ignition module could be found inside the distributor, on the distributor housing, or on the engine compartment’s side. When a module breaks, the engine will typically stop working altogether.

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