Electrical Problems
 

I have an 01 Boxster that had water invade the cockpit under the driver seat. The control unit was shorted. I sent the unit to be repaired, but am still having issue with the power locks, power windows, keyless entry, and the car will not start. Any ideas of what to check next??

Tell us more about the repair you had done. What parts did you send and what did they do?

Contact ECU Doctors and tell them it's still not working.

Electrical problems
 

I removed the burnt board and sent it, along with the ECM and key to ECU Doctors. I got the repaired unit back, but I still have the same issues. They suggested cleaning the hardness, so I did several times. The issues still exist. No power windows, no power locks, no keyless entry, and no start. I have plenty of power, newer battery.

I sent the board, ECM, and key to the ECU Doctors and they replaced the board. It was supposed to be plug and play, but I am having all the same issues- no power locks, no power windows, no keyless entry, and no start. They told me that the harness must be corroded, so I cleaned it several times, but no change.

Tell them that. They've screwed up before.

What does "cleaning the harness" mean? If you mean that you cleaned the contacts/pins in the wire harness connector, that may not be sufficient since the corrosion can go up through the connector and into the wires themselves. Did you try verifying continuity between the wire harness connector pins and other points in the wire harness?

If it were my car, I'd swap everything (ECU, immob, and key transmitter) into a another (working) car to verify that everything works. If everything works, then its your wiring harness and you're likely going to have to go pin by pin to find the signals that aren't working. If the electronics don't work in the good car, then send it back to ECU Doctors.

Electrical problems
 

I did tell them and they insist that it is an issue on my end. Thanks for the help. I plan on calling them again next week.

Electrical problems
 

Ok, so I did find a burnt fuse and I replaced it. Now I have power windows, power locks, and keyless entry. The car still will not turn over. Any ideas what to check next?

Clutch switch?

Electrical problems
 

Not it. I bypassed the switch still no fire.

The immobilizer is under the seat. Which modules did you send out. Was it the Immobilizer, ECU (from Trunk) and key?

I sent all three- the module under the seat, the ECM in the truck, and the key.

One new development that I just noticed. When I push the lock/unlock button on the key, the is the noise from the locks engaging and disengaging, but there was a new noise coming from the passenger side front fender. The noise sounds like something is rattling.

The gas cap locking and unlocking.

Tell us what happens when you turn the key to the start position.

When the key is in the on position, it is totally normal. Everything works as if it were going to start.

So it does nothing when the key is turned to the start position? Did the ignition switch get wet too? Did you buy this car as a flood vehicle?

No and no. I guess that one of the drains for the roof got clogged and cause water to come into the cockpit. That cause the module under the seat to short out. This is why I had repaired. As far as the ignition position, when the key is on everything works fine- radio, power windows, power locks, convertible top, it just doesn’t fire when I try to turn it over. I have sent the car to a shop that specializes in Porsche repairs. They are going to do some testing. Thanks for the help.

Good luck!

Wow, this is exactly the problem I'm having, and about to do the same thing. I went so far as to verify that the starter lock relay gets a signal from the ignition switch and the MFI+DI relay, but no signal from the ECU. But I get no codes in OBDII. I hope you get some resolution. It's driving me crazy. I've driven mine once since I bought it.

If I was a betting man, I would put my money on a bad chip in the key, or an issue with the receiver box that plugs into the ignition switch. If the “pill” in the key is bad, then the car won’t turn over.

It could also be the electrical connector at the back of the ignition switch.

If it were me, I would get a complete 2nd ECU, key, and immobilizer set, to see if that allows the car to start. Those 3 are easy to replace. If it starts, you have ruled out everything else and the problem is with one of the three components. If it doesn’t, then you know it is is switch, wiring, or chip receiver problem.

Good luck!

Update?
 

Any update on this issue? Inquiring minds want to know.