99 Code issue P1633 HELP!

[Kabasa1]

Hello everybody!
This is my first time here. I dont know where to turn. I ran a diagnostic with the OBd II scanner on my van because it wont pass emissions. I got P1633 (Keep alive memory power voltage too low) What the heck does that mean? and how do I fix it. Is there anyone here that can help me with this. I am an amatuer so please be gentle plus im a girl and dont know much but willing to learn

[12Ounce]

I'm so old ... I have to be gentle!

Your code is caused by a lack of good connectivity between the battery and the Powertrain Control Module (PCM) ... or a failing PCM (Ouch!).

1. Check to make sure the battery cables are not corroded and tightly fastened ... both ends.
2. Look around the alternator for corroded/loose terminals.
3. Under the hood, near the battery, there is a plastic covered "battery junction box"... full of relays, diodes, and fuses. Your glove box manual describes this box, as well as one by the driver's left foot; under a section labelled "Roadside Emergencies". Remove the cover from the box (clips on the rear)... and remove each component, one-at-a-time, and do some cleaning and lubricating of the base plugs and receptacles. Pay extra attention to fuses #1, #2, #20 and #113.
4. Unplug, lubricate and replug the PCM connector. You'll have to remove the wipers and cowling to access the PCM ... RH rear of engine compartment on the firewall. Have the battery disconnected for this one.
5. Check the powertrain electrical harness for breaks. Several '99's (mine included) have had abrasion where the harness goes over the ac tubing near the firewall.


Get back to us after checking all the above. Good luck!

[Dngrsone]

When 12 Ounce says lubricate the plugs, he dioesn't mean use WD-40 on the connector pins... there are electrical connector lubricants you want to use that won't cause more problems for you.

My favorite at the moment is TV Tuner spray from Radio Shack-- it cleans the crud away and leaves a light coating of dielectric lubricant to protect teh contacts from corroison. One can will likely last you a lifetime.

[rodeo02]

Originally Posted by Dngrsone

...My favorite at the moment is TV Tuner spray from Radio Shack-- it cleans the crud away and leaves a light coating of dielectric lubricant to protect teh contacts from corroison. One can will likely last you a lifetime.

Hey good call on that one! That is good stuff.
G/luck
Joel

[Kabasa1]

You guy's are awesome to get back to me. I'Ve got some work to do. I will start tomorrow and will get back to you as soon as I can.

Thanks everyone for replying!!!!!!!!!!!

[Kabasa1]

Im back everyone !
This turned out to be a very intresting project. I followed 12 ounces instructions starting with checking the fuses. I started with the box located under the hood. I was told to pay close attention to fuses #1,2,113 instantly I noticed that fuse #2 was completely missing. I replace it. Just to be sure I followed the other instructions for lubrication (TV Tuner spray) I figured it couldn't hurt while I was under the hood. I removed the harness to the PCM and proceeded to lub that as well and checked for breaks. I also checked the alternator connections as well. All was fine.
I replaced everything and ran the OBD II scanner and got (O) for the scan. I couldnt believe it so I ran the scan several times and still got (O)
I took the van in for the emissions test and "I PASSED EMISSIONS" the following day!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Special thanks to 12 Ounce for all the step by step insrtuctions that even a girl can follow
Dngrsome - If not for you, I may have used cooking grease
Rodeo 02 - Thanks for confirming


Kabasa

[DRW1000]

Originally Posted by Kabasa1

Special thanks to 12 Ounce for all the step by step insrtuctions that even a girl can follow
Dngrsome - If not for you, I may have used cooking grease
Rodeo 02 - Thanks for confirming


Kabasa

12Ounce is used to writing instructions that I can follow............lol

Thanks to you for taking the time to thank those who offered their assistance and letting everyone else know that your problem was solved and how it was solved.

Too often I see questions posted and advice provided and then we never hear back. We don't know if the proposed solutions worked and the thread is a lot less useful without the "closing" statements.

I am glad you found this forum and are willing to get your hands dirty.

[Dngrsone]

W00T! Glad to be of service.

[12Ounce]

Congratulations on your work. And I agree: Thanks for getting back to us.