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Old 10-10-2018, 07:33 PM   #1
Al10453
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Default BCM change over

I had my '01 LW200 BCM replaced about 10 yrs. ago & it's failing again. I attempted to swap it out with my original one. The original one was intermittent lights etc. When I reinstalled the original one I no longer had a brake light & hatch light staying on, but the security light was on & the car wouldn't start. Does that mean it has to be reprogrammed? If the BCM hasn't failed further wouldn't the VIN that's programmed into it still work?

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Old 10-10-2018, 08:04 PM   #2
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2000 L-Series 2.2L Sedan
Default Re: BCM change over

The system's security, PASSLOCK, doesn't recognize this BCM hence the security warning light illumination and a vehicle which won't start. A 30 minute re-learn procedure is required and has been written of many times in this sub-forum. See post #4 in the link below.

http://www.saturnfans.com/forums/sho...d.php?t=129705

Swapping BCMs is not particularly difficult. Remember the this particular computer (the BCM is its own computer) is also your Odometer and that memory information remains in the BCM. It cannot be altered by anyone - period. If retaining current mileage is of no interest then you need go no further than the PASSLOCK re-learn procedure. FYI, in order to maintain current mileage information one must purchase a new, or nowadays a factory remanufactured unit which is then programmed by a dealer mechanic. The odometer mileage is transferred from the old unit to the new/remanufactured/blank BCM.

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Last edited by pierrot; 10-10-2018 at 08:15 PM..

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