Module replacement - 99 Concorde
Ok, long story short, I think my PCM stopped working. My OBD-II box wouldn't read any more and a dealer's DRB-III wouldn't either. Dead as a doornail.
I thought maybe a '98 concorde 3.2 could supply its modules to replace mine (a '99 with 3.2 motor). And I replaced all 3 because they check each other's VIN coding, or so I've heard. The VIN has to match or the modules lock themselves out?
So I got the PCM and TCM (located under hood, driver's side front, remove the headlight to get at them, they are side-by-side with the fuse box, take out the TCM first) and the BCM (body computer, located on fuse panel) with the piggyback RKE (remote keyless entry) module. The 98 had no SKIM (Sentry Key Ignition Module - AKA chip-key reader), but my 99 does. I reasoned that it would still work, just that the sentry key function would be lost. I removed my SKIM module.
So the OBD-II never did wake up - but now the car flashes the lights when in 'run' position (only). The motor starts, but dies after 4 seconds.
The security system has kicked in? Unlocking the passenger door with the key doesn't help. I don't have a remote. The electric lock switches on the doors don't function any more. Anybody have any ideas? It troubles me that the OBD-II port is dead. Are there any other modules? The only other computers I could trace are the ABS brake module (located on the drivers side, front, almost directly under the headlight), and the infinity sound system amp module (pass side footwell).
My next attempt will be to swap '99 Intrepid PCM/TCM/BCM from a 3.5 motor (I have a 3.2) and see what happens then. Unless I find a 99 concorde first, but Intrepids are more plentiful around here...
Incidentally, the Infinity sound system amplifier module is located above the front passenger footwell side kick panel. It's very hard to get at (high up) - but I could feel it and removed it in the junkyard to see what it was. I doubt that module would have VIN checking. But if you are looking for it, it's up there, held by 2 - 10mm head screws at the bottom and has 2 wire connectors on the bottom.
Also, as a side note, the odometer changed to a different value after the PCM/TCM/BCM replacement, but I had left the dash cluster intact. So the mileage must be stored in the BCM...
ONCE I get it going, it is going to get a purple-sparkle (over black) paint job., like this red one and change the lettering on the rear and sides to ... G R A P E ... The Concorde is such sleek looking car with that oval grille like a racing ferrari, too bad it won't run...