Re: Powertrain control module
Well, our federal laws about the powertrain warranty would not apply over there, sorry!
I just re-read your posts - you do not mention the age of the battery, has it been replaced? The white "Varta" batteries would be original, and that's simply too old.
If the dome light dims a LOT when you go from "on" to "start", it indicates a weak battery or corroded terminal or loose connection somewhere. If the dome light does NOT dim at all, read on....
From what I can tell, if it is an automatic, the contact closure in the key switch commands the PCM to then command the pulse module to signal the starter relay to close, turning the engine over. BUT FIRST, the engine control relay on the Relay Control Module must close so that power to fuses 2 and 3 is present, fuse 3 feeds the PCM. If there is no power to the PCM on this line, you go nowhere.
Pull the RCM and have someone resolder ALL points on the RCM. You are looking for broken solder joints around the relay pins - REHEAT AND REFLOW EVERY RELAY PIN ON THE BOARD and put it back in and see what happens. The RCM is in the box next to the battery with the BCM and PCM, and is the module with all the fuses on it. (See page 8W -10 -21 to see the current path I am talking about)
PCM failures can happen, but are rare. RCM failures happen almost every day, we hear about them all the time on this forum.
Last edited by pizzaguy; Jun 9, 2013 at 10:49 AM.