Use an Ohmmeter to test the coil. Remove all the wires taken off the terminals of the coil attach the positive and negative, red and black, wires of the meter to first the terminal 15 (positive) and 1 (negative) that are stamped on the coil. A reading of at least 3 - 4.5 ohms, indicates a good coil.
Full Answer
Can a bad coil pack cause a VW Golf not start?
Bad Coil Packs are one of the more problematic ignition issues that can occur with the Volkswagen Golf. A bad oil pack can make your Golf almost un-drivable. Or it may have little effect at all on the engine’s ability to run. It’ll get worse as they lose their ability to fire the spark plugs.
How to tell if the ignition control module is bad?
The connector that feeds the ignition coil (of the ‘dead’ cylinder) is getting both power and Ground (TEST 3). The Switching Signal circuit (between the ignition module and the ignition coil) is OK. These three tests results help to indirectly confirm that the ignition control module has failed and is not activating this particular ignition coil.
How do I know if my ignition coil is bad?
Disconnect the cylinder #3 ignition coil from its 3-wire electrical connector. Probing the wire labeled with the number 1 of the ignition coil's connector ( see photo below ). - NOTE: This number is embossed on the ignition control module. The multimeter should register 1 Ohm or less if the wire (circuit) is OK.
How do you test an ignition coil with a multimeter?
Probing the wire labeled with the number 1 of the ignition coil's connector ( see photo below ). - NOTE: This number is embossed on the ignition control module. The multimeter should register 1 Ohm or less if the wire (circuit) is OK.
How do you test a VW ignition coil?
Use an Ohmmeter to test the coil. Place the red or black lead from the meter to the center of the coil (secondary post), and to either one of the terminals, 1 or 15 on the coil. A reading of 9,500 - 10,000 Ohms, sometimes less, indicates a good coil.
How do you check an ignition coil to see if it's good?
Use a spark tester to check the ignition coil.Plug the tester into the coil.Attach the ground wire.Plug in the coil connector.Adjust the spark gap to the correct measurement.Start the engine.If there's spark, great, it works! If there's no spark, it's a bad coil.
How do you test a golf one coil?
2:377:20Mk1 Golf Ignition Testing - YouTubeYouTubeStart of suggested clipEnd of suggested clipThere's three pins in here. As you can see that then what we're gonna do is gonna attach probes ofMoreThere's three pins in here. As you can see that then what we're gonna do is gonna attach probes of our multimeter to the positive or negative side of the coil.
How do you test a coil coil?
1:525:53How to Test Ignition Coils - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd simple test that can be done you use a circuit test which is also called a test lighting. AndMoreAnd simple test that can be done you use a circuit test which is also called a test lighting. And what you do you connect the negative up to the negative cable still disconnected.
How do you know if your ignition coil is bad?
What Are the Signs of a Faulty Ignition Coil?Loss of Power. This is one of the first symptoms of ignition coil failure. ... Check Engine Light On. ... Poor Fuel Economy. ... Backfiring. ... Misfiring Engine. ... Hard Starts and Stalling. ... Spluttering and Coughing Sounds. ... Jerking and Vibrating.
Can you test an ignition coil with a multimeter?
Ignition coils have two circuits that require checking; primary and secondary circuits. Connect the multimeter to the negative and positive terminals of the ignition coil to get a primary circuit reading. If the multimeter shows a reading of 0 ohms, the ignition coil has shorted and needs replacing.
How do you test a coil pack on a VW multimeter?
1:127:49How to Test an Ignition Coil Pack - Best Testing Procedure - YouTubeYouTubeStart of suggested clipEnd of suggested clipPosition. That's one before you start the car and then you get grab your multimeter. Put it on DCMorePosition. That's one before you start the car and then you get grab your multimeter. Put it on DC voltage. Ground your black test lead and then on the connector. Side you start checking for voltage.
How do you know if your coil pack needs replacing?
Common Symptoms of a Faulty Coil PackA rough idle.An unexplainably louder-than-usual engine.A noticeable lack of power.A significant drop in RPMs while accelerating for no apparent reason.A blinking or intermittently activating check engine light.An active gas warning light when the vehicle has plenty of gasoline.More items...
How do you test a 12 volt ignition coil?
To check your coil, ensure you have 12V going to the positive terminal. Once you confirm that is the case pull the wire out of the centre of the distributor and hold it a cm away from the distributor centre terminal. Have someone crank over the engine, and there should be a nice blue spark..
How many ohms should a ignition coil have?
A typical value would read 0.4 - 2 ohms.
How many ohms should a ignition coil have?
A typical value would read 0.4 - 2 ohms.
How do you test a 12 volt ignition coil?
To check your coil, ensure you have 12V going to the positive terminal. Once you confirm that is the case pull the wire out of the centre of the distributor and hold it a cm away from the distributor centre terminal. Have someone crank over the engine, and there should be a nice blue spark..
How do you test a 4 pin coil with a multimeter?
2:464:53How to Test Toyota's Four Wire Ignition Coils (Low Tech) - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe other negative end is hooked up to the to ground on the battery terminal. You can also use aMoreThe other negative end is hooked up to the to ground on the battery terminal. You can also use a power probe to check that that's a quick way to determine.
What Tools Do I Need To Test The Ignition Control Module And The COP Coils
As I mentioned at the beginning of this tutorial, you don't need a scan tool. Here are the tools you'll need:
Ignition Module Circuit Descriptions
The ignition control module has two connectors. Looking down at the ignition module (with the ignition module still bolted in place), you'll notice that the ignition control module has a left connector and a right connector.
COP Ignition Coil Circuit Descriptions
OK, before we jump into the testing part (in the next page), you need to know a few more things and this is what each of the three wires that connect to the ignition coil connector do.
Why is the ignition coil OK?
The ignition coil is OK because when you placed it in another location, it sparked (TEST 2). The connector that feeds the ignition coil (of the ‘dead’ cylinder) is getting both power and Ground (TEST 3). The Switching Signal circuit (between the ignition module and the ignition coil) is OK.
How to check if a car has a dead cylinder?
STEP 1: Unplug the ignition coil that did not spark (and that belongs to the ‘dead’ cylinder) from it's 3 wire electrical connector. Place your multimeter in Volts DC mode and: Check that there's 10 to 12 Volts with the Key On Engine Off on the wire labeled with the number 3. STEP 2:
How to tell if ignition coil is bad?
These are the symptoms of a bad ignition coil: Misfires – Check Engine Light: Misfiring is usually the first and most common symptom, and in most vehicles today, this will appear as a Check Engine Light. The misfire will either be on a particular cylinder, or random.
How many volts does an ignition coil take?
Types of Ignition Coils. Ignition coils come in various types of ignition systems, but all of them take energy from the battery (usually 12 volts) and convert it to a high enough voltage (50,000 volts or more) to create a spark.
What is a coil pack?
DIS, or wasted spark systems, use what is commonly referred to as a “coil pack” to send voltage to each spark plug wire, where other vehicles use a single coil for each spark plug wire.
Why does my ignition coil fail?
Ignition coils fail in 2 ways – either complete failure and lack of output, or intermittently, meaning, the coil gets weak, output gets low, or the coil sometimes works and sometimes doesn’t. Because of this, intermittent problems are more difficult to diagnose.
What happens if you have a bad ignition coil?
A weak or damaged ignition coil can cause engine misfires, stalling, poor performance, and lower fuel economy. A completely faulty ignition coil can often keep the vehicle, especially a 4 cylinder vehicle, ...
What happens when a coil fails?
Spark Test or Active Analysis. It’s important to remember that many times when a coil fails, it becomes weak. It still produces spark, and may still run the vehicle fine at times, but often under load, or acceleration, it can produce a misfire. Other times, the coil completely fails and stops working altogether.
Can you swap an ignition coil?
Swapping the ignition coil with another known, good unit on the car is the easiest and simplest way to begin diagnosis and works extremely well on any vehicle with single coils, multi-packs, or Coil-on-Plug. As mentioned before, in these cases, you will usually have a misfire on a particular cylinder.
What does a check engine light mean on a golf cart?
The check engine light is one of the most common symptoms of bad Coil Packs. More often than not, your engines computer will be able to detect bad Coil Packs in your Golf.
What happens when you hit the gas pedal on a golf cart?
As you hit your Golf’s gas pedal, the fuel and ignition systems respond. If acceleration has diminished, it should be felt. The less cylinders that your engine has, the more that one cylinder not firing properly will have an effect on engine performance.
Why does my spark plug feel rough?
When a Spark Plug is misfiring, it is often most pronounced at idle speed. This is because when the engine turns slower, it is easier to detect . You’ll feel a rough vibration.
Can a bad oil pack make a Volkswagen Golf undrivable?
Bad Coil Packs are one of the more problematic ignition issues that can occur with the Volkswagen Golf. A bad oil pack can make your Golf almost un-drivable. Or it may have little effect at all on the engine’s ability to run. It’ll get worse as they lose their ability to fire the spark plugs.
