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reset Jetta computer?


saintchuck's Avatar
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10-31-04, 12:22 PM   #1  
saintchuck
reset Jetta computer?

I recently bought a '99 VW Jetta. I like it a lot, but
it has some quirks: the beeper doesn't always go off
if you leave the parking lights on, the trunk light
and driver's door lights don't always go on when
you open those doors. Sometimes they do, sometimes
they don't. Doesn't seem to be any rhyme or reason.
Also the symbols for the heater, fan, and vents
don't light up.

I know the dealer replaced the battery just before I
bought the car; I'm not sure he took precautions to make
sure the car's computer didn't get screwed up.

Q: Is it possible these problems are related to the computer?
If so, what does it involve to get the computer reset?

Thanks,

saintchuck

 
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jatco's Avatar
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Join Date: Mar 2004
Posts: 1,045
CANADA

10-31-04, 05:59 PM   #2  
Posted By: saintchuck I recently bought a '99 VW Jetta. I like it a lot, but
it has some quirks: the beeper doesn't always go off
if you leave the parking lights on, the trunk light
and driver's door lights don't always go on when
you open those doors. Sometimes they do, sometimes
they don't. Doesn't seem to be any rhyme or reason.
Also the symbols for the heater, fan, and vents
don't light up.
....
Have you checked all your fuses (I presume so...)
Do the contacts on the door frame and truck slide in and out freely? If theyre sticky..that could be 1 reason.
The HVAC lites all being out seems odd.. could be a fuse situation again...
Im summizing here...

I know the dealer replaced the battery just before I
bought the car; I'm not sure he took precautions to make
sure the car's computer didn't get screwed up.
.
If they replaced the battery.. that may have reset the cpu/ecu already..
.
Q: Is it possible these problems are related to the computer?
Seems possible.. but I dont think so. Generally the cpu/ecu controls engine functions.. not cabin electricals..etc.
If so, what does it involve to get the computer reset?
...- Im not sure if this applies to Jettas..but on a 2nd gen mx6 (93-97), to reset the ecu/cpu, you disconnect the NEG battery terminal AND press the brake for about a minute or so. By pressing the brake, that drains any left over charge from the electrical lines in your car and insures that you will have no power going to your ecu. Then reconnect the Neg terminal ..and hopefully things improve....


Thanks,

saintchuck
.
Good luck..

 
Desi501's Avatar
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10-31-04, 06:43 PM   #3  
The lighting systems may have their own computers/modules but they have nothing to do with the engine's main computer.

 
pfc168's Avatar
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10-31-04, 07:36 PM   #4  
pfc168
jetta

there is a micro switch inside the driver side door that is either defective or loose soldering. I have a golf TDI 99.5 and a fwe club member had the same problem. go to vwvortex.com and post it there. you might find some answer there. good luck

 
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