Ohms test 2001 flht ignition coil - 2001 Harley Davidson FLHR - FLHRCI Road king

The ignition coil has two separate windings. They are not connected. Start by testing from one terminal to connection to another. If this works then the two others should be the other circuit. The primary coil has a low resistance, up to 10 ohms. The secondary winding has a higher resistanse, up to 100 ohms or so. If you measure Mohms then the coil jhas a break.

Duplicate question already answered

Hello Gary,

Lets start with the no spark...

Diagnosis & Testing

http://www.autozone.com/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f803714e1


The Distributor Ignition (DI) system is controlled by the Powertrain Control Module (PCM).

The Distributorless Ignition System (DIS) is controlled by the Powertrain Control Module (PCM).

Testing The Ignition Coil

1. Remove the ignition coil(s).
2. Using an ohmmeter, check the resistance between the primary terminals on the underside of the coil. The resistance should be 0.50-0.90 ohms.
3. Check the resistance between the secondary terminals. It should be 5000-10,000 ohms.
4. If the coil failed either test, replace the coil.

If the coils(s) are good check the ignitions leads by measuring their resistance. (Multi Meter required.) If the coil(s) and leads are good

Secondary Spark Test
http://www.autozone.com/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80371564


Please provide some details on your engine option 4 cylinder/6cylinder 2 WD 4 WD. Mileage...

Are there any codes. Does it backfire?

To start you need spark at the plugs, fuel in the induction module or tubes and compression in the combustion chamber. Have you checked any or all of these???

As a starting point install NEW plugs and also:

Ignition Coil Primary Circuit Test
Remove the coil. THEN set your ohmmeter scale to RX1 and place ohmmeter leads on the primary coil windings A (front of coil) to B (middle of coil), B to C (front of coil) and check for primary coil winding resistance which normal resistance range is 0.5-0.7 ohms. If primary resistance is not within this range check out test results below.

Ignition Coil Secondary Circuit Test
With the ignition coil removed from the motorcycle and the ohmmeter set to the RX1K scale place the ohmmeter leads on the secondary coil windings B (middle terminal) to
R (rear secondary terminal/socket), B to F (front secondary terminal/socket) and check for secondary coil winding resistance which normal resistance range will be 5.5-7.5K ohms. If secondary resistance is not within this range check out test results below.

Test Results
A low resistance value indicates a short in the coil winding which requires coil replacement.

A high resistance value might indicate that there is some corrosion/oxidation of the coil terminals requiring the coil terminals to be cleaned and the resistance test then repeated and if after the test is repeated the resistance is still high after the terminals were cleaned the coil must be replaced.
If there is an infinite ohms or no continuity) resistance value the coil is open and must be replaced.

this code is saying you have a failing ignition coil..You will have to swap them and determine which one is failing...here is the procedure.. DTC P0354; RANDOM MISFIRE DETECTED, MISFIRE DETECTED, (CYLINDERS 1-8) IGNITION COIL PRIMARY CIRCUIT MALFUNCTION, (CYLINDERS 1-8)

G290076t1 : CHECK COIL FUNCTION BY SUBSTITUTION

1. Swap the suspect coil for a known good unit.
2. CLEAR the DTC. TEST the system for normal operation.

- Does the same DTC reoccur? The DTC will indicate if the same cylinder is misfiring. -> Yes
INSTALL a new coil. CLEAR the DTC. TEST the system for normal operation.

-> No

G290076t2 : CHECK THE IGNITION COIL SUPPLY VOLTAGE CIRCUIT

1. Disconnect the relevant ignition coil electrical connector(s), (PI02 to PI09).
2. Turn the ignition switch to the ON position.
3. Make sure the ignition relay is energised.
4. Measure the voltage between:

- Is the resistance greater than 5 ohms? -> Yes
REPAIR the high resistance circuit. CLEAR the DTCs. TEST the system for normal operation.

Test the primary coil resistance on your coil. Disconnect all the wires going to the small terminals on your coil. Using a good ohm meter, test the resistance between the two small terminals. You should read somewhere between 2 and 3 ohms. If you read more, the coil is bad.

You can also test the coil by leaving the "hot" wire on the coil and replace the other side with a short piece wire. Turn the ignition on and temporarily ground the short piece of wire you put on the "out" side. When you take the wire away from ground, you should see a spark at the plugs.

Good Luck
Steve

Sounds like the coil. Had the same problem with a Sportster, changed coil. As coil ages it breaks down, heat expands internal connections and coil fails. When cooled, coil contracts and the contacts come back together. This COULD be your problem, not sure. Do you have a buddy that will let you try his coil for a test?