About to install a MSD Opti and electric WP. Will probably kill a day doing this. My next focus is to try and fix my PKE module/chimer.

I've scanned the many posts here on this and the problems people have with these vary greatly.

My situation has the receiver module as suspect as I cannot get the PKE to program into the receiver. But other issues are on the table as well. The horns blow the fuse immediately when I put in a new fuse and my doors have no chime. Could all this be related somehow? Has anyone experienced a problem such as this?

I hate electrical issues, they are so hard to troubleshoot!

Billy

 

Have you pulled the dash out so you can get the fob within one inch of the PKE module? Dont point the finger at the module til you check it properly (which you dont state you have done)

Have you read the diagnostic info in the sevice manual? Book 1, section 9K. Much easier to trouble shoot after you follow those procedures

 

Nope! Haven't torn into the dash yet. I plan to pull the radio out soon for Dr Don to work his magic on and I'll do it all then. Was wondering if someone here has had similiar problems. I have the Helms manuals so I guess I need to do some study.

The big task facing me immediately is the opti replacement.

Billy

 

PKE receivers are likely items to go bad but there are still other items to check.
Some basic ones are; does your security light flash with the door open and stop when closed with key out.
There is a contact associated with the key switch that enables it to go into programming mode. You do not have to disassemble steering column to check this.
Do the buttons on your panel all seems to work normal for gauges and fuel mileage.
PKE and radio fuse.
Do you have and control of your electric door locks.

These are just some common places to start and common indicators.

I have information on the chimes also but do not want to mix in with this post.

 

Also make sure your door lock cylinders are not pressing their switches that disable the alarm or the PKE wont work.

I had the same issue a few days ago where the PKE wouldnt program, the receiver was fine, the antenna in the back was not connected to it cleanly and was not doing anything. I no longer have a door antenna cause for some reason it was never refitted after the right hand drive conversion.

 

The security light flashes and appears to work normally. All the buttons on my panel seem to work normally and all gauges work normally. The chimes do not work. I get a C72 (LCD Open) code and the fuse to the horn blows. Door locks work fine.

 

The chimes: This is a separate issue and repair. Pretty easy to troubleshoot and test on a table top with an 12 volt power supply.

The horn is a separate repair also. You need to do some basic troubleshooting and look for a short in either the horn or relay circuit. Don’t have the book here right now so cant give you an exact best starting point. But this should not effect the PKE as we are trying to focus on.

Can’t comment much on the C72 error code at this time accurately. I assume that code is from module 1 which a CCM code. Again need the book. This might relate to something on the instrument panel but not sure. Probably some kind of B+ for a temperature or light sensor but that is a guess at this point. However I would clear the code and then check to see if it returns before I ran after it.

Unfortunately much of the testing needs to be done with the pad removed. Just a bit of a pain the first time. Good thing is you will be able to get to the chimes and PKE at the same time. Then you can start taking some measurements off the PKE connector.

Having the door locks work indicate the PKE is getting basic power and is not completely dead because the lock circuit go thru it. But don’t get to excited, my symptoms were exactly the same as yours. Locks worked, no action from PKE lamp, the car and other input checked out OK and it was the receiver, but first things first.

The only other simple thing I might check first is the PKE lamp in the DIP just to make sure. Not to hard to get at considering it is on the way to get the pad out.

 

The module one DTC 72 is an LCD dimming error, i seriously doubt it has any bearing on the PKE problem here, and the GM service manual will be required for that, its in book 1, section 8.

Also, you can use the paper clip to test various CCM controlled funtions of the car, but again, you need Book 1, section 8 for this procedure, cause i aint typing out all those pages!!

The chime issue could be a faulty unit, it could be a bad connection, but it wont be the module 1 DTC 72.

If you pull out the fuse that is marked PKE in the main fuse panel and leave it out for a while, this will reset the PKE to default modes when you put the fuse back in. This means it will be on Driver door only mode, and also on Passive entry mode. In this case, when the key is turned to the ON position, the PASSIVE KEYLESS ENTRY indicator should light up in the bottom left of the DIC panel. If not, check the bulb, then move forward from there.

Youve got it very easy, if you follow the instructions in the GM service manual, you cant go wrong. It points out exactly where each part is. Try doing it on a right hand drive when all the parts happen to be where ever the last person to pull it apart thought they should go!!

 

Thanks guys! I need to troubleshoot this more I know. I just got my electric water pump and my MSD optispark in the mail today and that is my next focus.

Immediately after that install, I'll take on this PKE thing. I'm hopeful the receiver is not bad.

Thanks again for the advice. It's greatly appreciated...


Billy