How to check to see if you have a broken wire before replacing PCM

Hello, check the compression on all cylinders, check the injector on #6 cylinder and let me know.
Thanks.

There is a tsb on this for multiple Ford models. One user stated they had to replace the control module.
May want to Google it and contact a local dealer for more info.

Check engine light on ? Code's ? What engine ? 2.3 l 4cylinder or 3.ol v-6 This vehicle has coil on plug ignition system , not coil packs ! a coil per cylinder . If new coils an still has no spark , has no B+ voltage to the coil or the PCM isn't controlling them . Without testing i'd only be guessing as to the problem .If the repair shop you had it to can only say it had to be the coils , I'd find another shop to take it to !
Autolite Coil on Plug Ignition troubleshooting

DTC code P0356, "Ignition Coil "F" Primary/Secondary Circuit"
The COP (coil on plug) ignition system is what is used on most modern engines. There is an individual coil for each cylinder that is controlled by the PCM (powertrain control module). It eliminates the need for spark plug wires by putting the coil right above the sparkplug. Two wires are dedicated to each coil. One is a battery feed usually from the power distribution center. The other wire is the coil driver circuit from the PCM. The PCM grounds/ungrounds this circuit to activate or deactivate the coil. The coil driver circuit is monitored by the PCM for faults
If an open or a short is detected in the driver circuit for coil #6, a P0356 may set. Also, depending on the vehicle, the PCM may also shut down the fuel injector to the cylinder also.

One of the coil packs have shorted. The code refers to cylinder #6. That is the front bank, right side (Drivers side) while facing the engine.

What you can do to be sure is swap that coil, with the one next to it (cylinder 4). Disconnect the battery for a minute to clear the codes and drive it, The code should come back and be a p0354. That will confirm that coil pack (which is now in middle cylinder) is bad.

Potential causes of a P0356 code include:

Short to voltage or ground on COP driver circuit
Open on COP driver circuit
Loose connection at coil or broken connector locks
Bad Coil (COP)
Faulty Powertrain Control Module

Possible Solutions

Is the engine misfiring presently? If not, the problem is likely intermittent. Try wiggle testing the wiring at the #6 coil and along the wiring harness to the PCM. If manipulating the wiring causes the misfire to surface, repair the wiring problem. Check for poor connection at the coil connector. Verify the harness isn't misrouted or chafing on anything. Repair as necessary

If the engine is misfiring presently, stop the engine and disconnect the #6 coil wiring connector. Then start the engine and check for a driver signal to the #6 coil. Using a scope will give you a visual pattern to observe, but since most people don't have access to one there's an easier way. Use a Voltmeter in AC Hertz scale and see if there's a Hz reading of between 5 and 20 or so that indicates the driver is working. If there is a Hertz signal, then replace the #6 ignition coil. It's likely bad. If you don't detect any frequency signal from the PCM on the ignition coil driver circuit indicating the PCM is grounding/ungrounding the circuit (or there is no visible pattern on the scope if you have one) then leave the coil disconnected and check for DC voltage on the driver circuit at the ignition coil connector. If there is any significant voltage on that wire then there is a short to voltage somewhere. Find the short and repair it.

If there is no voltage on the driver circuit, then turn the ignition off. Disconnect the PCM connector and check the continuity of the driver between the PCM and the coil. If there is no continuity repair the open or short to ground in the circuit. If continuity is present, then check for resistance between ground and the ignition coil connector. There should be infinite resistance. If there isn't, repair the short to ground in the coil driver circuit

NOTE: If the ignition coil driver signal wire is not open or shorted to voltage or ground and there is no trigger signal to the coil then suspect a faulty PCM coil driver. Also keep in mind that if the PCM driver is at fault, there may be a wiring problem that caused the PCM failure. It's a good idea to do the above check after PCM replacement to verify there won't be a repeat failure. If you find that the engine isn't misfiring, the coil is being triggered properly but P0356 is continually being reset, there is the possibility that the PCM coil monitoring system may be faulty.

Hope this helps.

sounds ike it could be the Crank sensor, do you have the OBDII code off hand?

P0305 - Cylinder 5 Misfire Detected
P0306 - Cylinder 6 Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, The Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

When is the code detected?
- Engine Cylinder #5 and #6 is Misfiring.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation

Possible Causes:
- Improper spark plug at cylinder #5 and #6
- Insufficient compression at cylinder #5 and #6
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #5 and #6
- Fuel injector #5 and #6 may be faulty
- Intake air leak at cyli

Possible Solution:
- Perform Injector Service
- Replaced Spark Plug #5 and #6
- Replaced Injector #5 and #6
- Replaced Ignition Coil #5 and #6

Hope helps.

What the miss there before you started replacing parts or did you replace some of them as maintenance items. Like the plugs. Possible that the parts store gave you one with a crack in it??? Also how about a vacuum leak at the intake gasket. You said you have compression. Have you tried checking running compression. A broken valve spring can cause good cranking compression, but cause no compression when it's running.

check fuel pressure and fuel filter it sounds like your not getting enough fuel to motor
spray a little starter fluid into throtlebody
if it runs you have a fuel prob. keep us posted

Here are some possible causes: PO306 means cylinder #6 only.

Possible Causes Setting Conditions

• Air leak in the intake manifold, or in the EGR or PCM system
• Base engine mechanical fault that affects only one cylinder
• Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
• Ignition system fault (coil or plug) that affects only one cylinder

You may consider tracing back from coil back to the main plug and checking wires going into and coming out of the plug for any broke wires make sure to look for collapsed casings sometimes the wires will break internally