22
May
Remove one spark plug wire from its plug. Eliminates the need for distributors and spark plug wires.
As with most types of vehicular maintenance youll want to begin the test.
How to test coil on plug. You will recognize these coils immediately as they sit directly on top of the engines valve or cam cover are bolted down and attach directly to the spark plug via a rubber boot. As Ive already mentioned the type of Coil on Plug ignition coil that well be testing has two wires in its connector. The testing of these two circuits is done in part while the engine is being cranked.
Testing these circuits can be accomplished in several different ways. Turn the vehicle off and open the hood. As with most types of vehicular maintenance youll want to begin the test.
Remove one spark plug wire from its plug. Next remove one of the spark plugs wires from the plug itself. Remove the spark plug using.
Plus using a spark tester is safer than grounding a plug. Use a Coil-on-Plug COP Probe. Test the secondary circuit of the ignition coil.
Many techs will test a coil primary winding with an ohmmeter but that only checks the coil itself when its cold. If you back-probe the two-wire coils ground circuit at the PCM connector and look for battery voltage with the engine warmed up but not running KOEO that tells you something about the entire circuit. The Coil On Plug Ignition System places an ignition coil.
Directly on the top of each spark plug. As a result the Coil On Plug Ignition System. Eliminates the need for distributors and spark plug wires.
With the Coil On Plug Ignition System. Ignition timing is handled by the ECU based on inputs from various sensors. To test these circuits its not necessary to unplug the ignition coils connector.
HOW TO TEST AN IGNITION COIL WARNING. Never pull off a plug wire or the coils high voltage output wire to test for a spark. Besides risking a severe shock an open plug wire or coil wire will increase the voltage demands on the coil to the point where it may damage the coil.
The only safe way to test for spark is to use a spark plug tester tool. To test the operation of both the ignition coil and the spark plug connect the tester between the spark plug boot and the spark plug. Then start the engine and watch the tester window.
Hold the plug wire using insulated pliers and allow the bare end of the spark plug to touch a grounded surface. Such an exposed metal area. Take help from your partner or someone else and ask them to start the ignition.
When the key is turned on you should see a bright blue spark at the end of the spark plug. The following testing instructions assume that you already have a specific cylinder in mind to test. 1 Remove the Coil-On-Plug COP coil that you need to test.
Itll be necessary to disconnect the COP coil from its electrical connector to remove it. A reading over the specification signals that the ignition coil is open which would also indicate a need to replace the coil. Test the secondary circuit of the ignition coil.
Connect your multimeter to the positive terminal or pin of your coil and to the high output terminal that goes to the spark plug. Involves testing your secondary circuit of the ignition coil. This step involves connecting the positive terminal of your ignition coil to your digital multimeter and then to the high output terminal which runs to the spark plug.
The majority of the ignition coils usually have a secondary resistance of about 6000 to 10000 ohms. Check engine light P0304 misfire. Replace the 4 ignition coil.
How to perform a cylinder drop test power balance test to identify a misfiring cylinder. How to perform a relative compression test. How to perform a spark output check on a coil over plug ignition coil.
Understanding three and four-wire coil circuit design and operation.