Question about 2000 Saturn L-Series

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I need to reprogram my saturn 2000 L series

I recently installed a new ECM into my saturn 2000 L series and now i need to reprogram my vehicle but i don't know how to do that.

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You need to take it to the dealer as they are the only ones who can program your PCM.

Posted on Jul 25, 2009


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My 2003 Saturn L300 engine code P1780 wont run when it get hot?

#PIP3922: Repeat DTC P0606 And P1780 Setting - keywords 00 01 02 03 04 05 DTC JB L81 MAF MIL P0606 P1780 reducedpwrmde reman saturn - (Sep 26, 2006)

Subject: Repeat DTC P0606 and P1780 Setting

Models: 2000-2005 Saturn L series with L81 V6 The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
A technician may find codes P0606 and P1780 setting. They may state that they are not able to duplicate the concern. Tech may state that when the customer is driving they report a sudden loss of power, then no throttle response, and the warning indicators come on. Tech may also state that the ECM and MAF were replaced with no change.
These codes will set if the wrong MAF was installed on the vehicle previously. This being an intermittent code the MAF may work without any concerns initially. The retailer may not be aware of 2 different part number MAF's for 2000-05 L series with L81. Compounding this is the reman sticker may fall off and GM does not cross reference the Bosch part number to theirs. Any time these codes are setting have technician verify the correct MAF is installed using the reference below
The part numbers are:
2000-03 90528435 Last 3 of Bosch # 184 (important because the reman sticker may be missing)
2004-05 24437651 Last 3 of Bosch # 087 (important because the reman sticker may be missing)
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a ""do-it-yourselfer"". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

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Where is the ecm located on 2000 satrun ls1

The PCM is located in the cowl area in front of the passenger side of the windshield. There is no ECM on this car. The PCM controls engine and transmission functions.

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Steps to replace the ecm. do I need to unhook the battery, or anything. After it is replaced, is there any other steps like resetting anything?

Replacing and ECM is a farily involved job which will require reprogramming the replacement ECM to match the vehicle that it is installed in. Dealerships and a few independent service facilities are set up to do the reprogramming but the unprogrammed ECM may not even be able to start the vehicle until programmed so it's not a DIY kind of project. It's RARE that a vehicle needs the ECM replaced as there are a quite a few problems that can mimic a bad ECM and often an ECM problem can be fixed with a reflash update of the software. Hope this helps and good luck!

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