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Are you referring to the ECM as the PCM, or the BCM?
The BCM has been the cause of current drain in many cars, I gave advise to ship the BCM to G7 Computers and have them test the module, you could also send them the PCM as well. Good Luck
Well we still don't know what was causing the current drain as the guy with the sledge hammer smashs some unidentifiable electronic device.lol
I gave up I checked everything 3 times. Except for BCM. I can't have the car down that long to send out. But I did pull plugs and got values but Don't know what that means.
Helga, idk if it's the BCM, or not. That said, it was the BCM on my 2000 vert. It took a brand new battery from full charge to completely dead in under 24 hours!! Sending out for repair cost over $500.00 back in 2014, and a brand new one (last one the Delco/Delphi warehouse had!) was over $900.00. The guy that built my engine let me use his wholesale account, so it cost me around $750.00, iirc. This shop told me I should go with a new one, because everything inside would be new. He also told me there are a lot of circuits in the BCM, and if they don't all shut down in the exact sequence, it will discharge the battery very quickly. Hope it's not the BCM, Helga.....
In my case? I guess when I posted it cost me $750.00 wholesale, people would know I bought the new BCM. Guess I should've been a bit clearer. Sorry for the confusion. New BCM has been in for 8 years now, and I haven’t had another battery drain issue since, at least, not yet.......
I gave up. The last test i did was he BCM. When it goes into sleep mode i pulled the plugs from top to bottom. Car was in sleep mode again .210. I pulled the top connector first and had no change plugged it back in and pulled the second connector and mv went to .03. and finally the small connector showed .147. Plugged it in and went back to .210.
When your BCM has gone into sleepmode , can you measure the voltage above each fuse under hood and in the instrument panel (passenger footwell with DVOM range in mV (millivolt) and report back if you have any fuses above above zero mV ?
BCM has two MiniFuses (23 &25) feeding the BCM when ignition OFF.
This UNI-T UT210E Handheld Digital Clamp Meter is very useful when tracing current leaks on cars. I use mine a lot ,it's accurate and it's easy to use
When your BCM has gone into sleepmode , can you measure the voltage above each fuse under hood and in the instrument panel (passenger footwell with DVOM range in mV (millivolt) and report back if you have any fuses above above zero mV ?
BCM has two MiniFuses (23 &25) feeding the BCM when ignition OFF.
This UNI-T UT210E Handheld Digital Clamp Meter is very useful when tracing current leaks on cars. I use mine a lot ,it's accurate and it's easy to use
Ok just to clarify, One side of the fuse is hot all the time but im going to measure the other side to ground???
No , you measure voltage drop over the fuse itself , like shown below .Bothe sides are hot , but with a mV drop if you have a current leak
When I left my foglights on , I measured 30mV over the 10A MiniFuse
When you measure across fuse 23 and 25 you should have a millvolt reading that corresponds to 210 millamps of sleep mode current, that will tell you that the BCM is the cause of excessive current draw.
220 × 122
