TEST 1: Spark Test

How To Test The Ignition Coils Suzuki: Swift, Vitara - Chevy: Metro, Tracker How To Test The Ignition Coils Suzuki: Swift, Vitara - Chevy: Metro, Tracker

Whether you know which cylinder is the one that is misfiring or not, I recommend that you test all four cylinders for Spark.

As mentioned before, the successful outcome of your trouble-shooting/diagnostic lies in the usage of a Spark Tester.

The following test steps assume that you're gonna' start by testing from the #1 cylinder:

  1. Remove the spark plug wire (High Tension Cable) from the spark plug and attach the spark tester to it.
  2. Ground the spark tester with a battery jump start cable as shown in the photo in the image viewer.
  3. When a safe distance from the engine, have your helper crank the vehicle.
    1. The vehicle may or may start, either way be careful.
  4. As the vehicle cranks or starts, observe the spark tester to see if spark jumps across its air gap.
  5. You're gonna' get one of two results: Spark or No Spark.
  6. Now repeat this test on the other cylinders.

IMPORTANT: Since one Coil-on-Plug Ignition Coil fires two spark plugs simultaneously, the following result interpretations take into account if the No spark results that you may have obtained are from the spark tester connected to a spark plug wire or connected directly to the ignition coil. Read all of the options carefully to see which fits your spark result(s):

If you got spark from all cylinders, this indicates that the ignition coils and spark plug wires are OK. The cause of your misfire condition is not due to a bad ignition coil. Go to TEST 7 to see further tips and suggestions.

If you got NO spark from a spark plug wire, further testing is required to see if this is due to a BAD Spark Plug Wire (High Tension Wire) or if the C.O.P. Ignition Coil it's attached to is bad. Go to TEST 5.

If you got NO spark from an Ignition Coil's Spark Plug Boot, this indicates that the C.O.P. Ignition Coil is probably BAD. The good news is that we can make sure it's bad in TEST 6. Go to TEST 6.

If you got NO spark from a spark plug wire and a Spark Plug Boot on the same Ignition Coil, the next step is to verify that the ignition coil is getting power, Ground and the Triggering Signal, go to TEST 2.

TEST 2: Testing The Power (12 V) Circuit

How To Test The Ignition Coils Suzuki: Swift, Vitara - Chevy: Metro, Tracker How To Test The Ignition Coils Suzuki: Swift, Vitara - Chevy: Metro, Tracker

The Coil-on-Plug (C.O.P.) Ignition Coil needs 12 Volts to be able to function. The test can be accomplished by testing the C.O.P. Coil connected or disconnected to its connector.

The method I recommend to use is with them connected to its connector and with a Wire-Piercing Probe (to see what this tool looks like, click here: Wire-Piercing Probe.

Now, if you decide to unplug the connector to test the front of the female terminal (of the connector) for 12 Volts, be careful not to damage it.

  1. Re-install the ignition coil back onto its place on the Valve Cover.
  2. The three wires in the ignition coil's connector are usually sheathed in a hard plastic tube, remove enough of this plastic tube to expose the three wires for testing.
  3. With the ignition coil connected to its connector.
  4. Put the multimeter in VOLTS DC mode.
  5. Probe the circuit labeled with the number 1 (see photo in image viewer) with the red multimeter test lead (using an appropriate tool to pierce the wire).
  6. With the black multimeter test lead probe the battery negative (-) terminal.
  7. Have your helper turn the key to the ON position.
  8. You should see 11-12 Volts on your multimeter, or if you're using a test light, the test light should light up.

Let's take a look at what your test result means:

If the multimeter registered 11-12 Volts (or the test light lit up), then the Power Circuit is OK and is delivering voltage. The next step is to test the ground circuit, go to TEST 3

If the multimeter DID NOT register 11-12 Volts (or the test light DID NOT light up), then the Power Circuit has a problem. This result eliminates the COP Ignition Coil as the source of the misfire condition. Repairing the cause of this missing voltage will solve the No Spark Condition of this Ignition Coil.

TEST 3: Testing The Ground Circuit

How To Test The Ignition Coils Suzuki: Swift, Vitara - Chevy: Metro, Tracker How To Test The Ignition Coils Suzuki: Swift, Vitara - Chevy: Metro, Tracker

The Coil-on-Plug (C.O.P.) Ignition Coil needs Ground to be able to function. This test can also be accomplished with the ignition coil connected or disconnected to its connector.

  1. Put the multimeter in VOLTS DC mode.
  2. Probe the circuit labeled with the number 2 (see photo in image viewer) with the black multimeter test lead (using an appropriate tool to pierce the wire).
  3. With the red multimeter test lead probe the battery positive (+) terminal.
  4. Have your helper turn the key to the ON position.
  5. You should see 11-12 Volts on your multimeter, or if you're using a test light, the test light should light up.

Let's take a look at what your test result means:

If the multimeter registered 11-12 Volts (or the test light lit up), then the Ground Circuit is OK and is delivering voltage. The next step is to test the ground circuit, go to TEST 4.

If the multimeter DID NOT register 11-12 Volts (or the test light DID NOT light up), then the Ground Circuit has a problem. This result eliminates the COP Ignition Coil as the source of the misfire condition. Repairing the cause of this missing ground will solve the No Spark Condition of this Ignition Coil.

Chevrolet Vehicles:
  • Metro 1.3L
    • 1999, 2000, 2001
  • Tracker 1.6L
    • 1999, 2000, 2001, 2002
Suzuki Vehicles:
  • Swift 1.3L
    • 1999, 2000, 2001
  • Vitara 1.6L
    • 1999, 2000, 2001, 2002