Replacement PCM

[Navarrefisher]

1. 2B013378
2. 2013/Mercury/Pro XS

Getting no signal from the PCM. Tracked down every wire/ground/fuse/relay I could find with no avail.

Does anyone have a trusted company that sells replacement PCMs?

Thanks

[lpugh]

Specifically what signal is missing, I would be very surprised if the PCM is bad. There is a lot help here if you provide detailed information to help narrow it down. I sure would not replace it until the system is scanned for codes and freeze frame failures

[KJK]

I have a PCM with around 40 hours on it. PM me if you want to purchase it.

[Navarrefisher]

I have it in a shop right now waiting to hook it up to the computer. If it’s bad I’ll send you a dm. Do I not need a 2013 pcm?

[EuropeanAM]

There's no such thing as a "2013 PCM". What you would need (assuming your PCM is actually bad) is the CORRECT PCM for your engine.

8M0063455 is the only CORRECT PCM for your engine.

[Navarrefisher]

Thank you! Are they basically plug and play or do they need to be flashed before use?

[EuropeanAM]

Plug and play with the CORRECT part. Keep in mind that new PCM's automatically show up in BREAKIN mode (you will have to expire the break-in clock, and should be prepared with TWICE the amount of oil you usually use).

[Navarrefisher]

Not to hijack my own thread but I was reading some older info trying to figure out why my vessel view wasn’t turning on.

At the harness I need 12v between red and black / purple and black with the key on.

When I tested this about a week ago purple did not have 12v. Could this be the same problem that’s causing this no start?

Thanks Don

[EuropeanAM]

Yes sir- sure could.

Check your LANYARD SWITCH (first).

[Navarrefisher]

Just replaced the lanyard switch in hopes that was it. Double checked the wiring should be gtg. Where should the purple wire be getting power? Looks like it leads back to the pcm.

[lpugh]

Just replaced the lanyard switch in hopes that was it. Double checked the wiring should be gtg. Where should the purple wire be getting power? Looks like it leads back to the pcm.

Brick it is really not a good idea to replace parts to Lets See If (LSI), Much, better to test and confirm to have confidence that another day on the water is not spoiled, I have seen this more times than I can count where this aproach has been used. I end having to diag and repair several built in problems in the process of repairing what was once a simple problem. Consumer ending up with a lot more money invested in the end. Very rarly unless issue is an very inttermittiant problem should this aproach be used

[silvertalon]

Yes sir- sure could.

Check your LANYARD SWITCH (first).

Purple is always 'key switch on' power.

[EuropeanAM]

Purple is always 'key switch on' power.

+1

And on many later outboards it is wired through the Lanyard Switch.

If there is no power on the purple wire circuit- the PCM will not "wake", and there will be no fuel or ignition system function.

[Navarrefisher]

Alright to finally put this one to bed. The vast majority of opinions were correct, it was not a PCM issue.

Don hit the nail on the head with the purple wire not providing 12v to “wake” the PCM.

Traced the wire all the way back and somewhere between the ignition and the PCM it lost 12v. I hot wired it and PCM came right up and started immediately.

Thanks everyone for all the help. Looks like I’ll be doing some rewiring here shorty.

[Navarrefisher]

Don,

Thinking about replacing the harness from the ignition to the 14 pin plug on the motor based on me not being able to find the cause of the purple wire losing 12v.

Im guessing it somewhere within the hull that I can’t see.

Do you have a part number by any chance?

[EuropeanAM]

No, because length, harness type and keyswitch type all are factored into the correct part number. Best to contact Rhonda (see her post, pinned at the top of the Forum).

Make sure that this circuit is connected/closed at the lanyard switch.