Reset a VATS module? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-22-2006, 12:09 AM   #11
Senior Member
True Car Nut
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

Thanks for the link.

A faulty ignition switch (VATS wire problem) would not cause the car to stall. It would only prevent the car from being started, perhaps intermittently if the wire wasn't totally disconnected or broken. A faulty VATS module however could cause the car to stall once the engine is running. The module sends a Pulse Width Modulated signal to the PCM. If this signal is not present, the PCM will not provide injector pulses thus causing the engine to stall.

At this point I would suggesting installing the appropriate resistor to bypass the ignition key in order to test the module. Go to a local shop that installs remote starters and ask them for a "VATS pack". Many remote starters include a package of resistors, one for each of the 15 values. If the starter in installed in a vehicle that is not equipped with the VATS system, the resistors go unused. You should be able to get one at no charge if they're in a good mood.

If you determine that the the module is faulty, I may be able to find one in my parts bin from a 93 SE. I still have the keys (somewhere) so the resistor value is known.
randman1 is offline   Reply With Quote
Old 01-23-2006, 04:53 PM   #12
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2003
Location: Oklahoma
Posts: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Kuhl is on a distinguished road
Default

Well if the wire was broken that is in the ignition wouldnt the vats module cause the car to stall ? It wouldnt be able to read the value correctly. Now it just doesnt even turn over or anything. Which makes it sound like its probably the vats module because doesn't it enable the starter relay?
Kuhl is offline   Reply With Quote
Old 01-23-2006, 05:27 PM   #13
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2003
Location: Oklahoma
Posts: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Kuhl is on a distinguished road
Default

I just talked to the mechanic again and what we thought is true and he admitted it... he has NFC whats going on. So basically its me troubleshooting the thing now and so I asked him what ohm value the key is reading and he says 480... well if you look at the diagram up there kindly supplied by randman you will see that 480 isn't an acceptable value. So right now he is checking to see what ohm value the old key has to see if there is a difference. If there is.... im a flip my lid.
Kuhl is offline   Reply With Quote
Old 01-23-2006, 07:02 PM   #14
Senior Member
True Car Nut
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

Quote:
Originally Posted by Kuhl
Well if the wire was broken that is in the ignition wouldnt the vats module cause the car to stall ?
If the wire was broken, the car wouldn't crank. No crank, no start therefore no stall. If the car cranks and runs for like 3 seconds and then stalls, that sounds like a missing PWM signal. The VATS module controls two things at the same time: Start enable relay and PWM signal for fuel delivery. This actually helps with troubleshooting cause if the car fails to crank and you can not hear the fuel pump prime, the VATS is the most likely problem. But, if one or the other is working as it should then VATS is not a suspect.

Definately measure the old key and obtain the resistance. Hit up the shops for that VATS pack. If you run into trouble, I can probably get one from a buddy that runs an audio shop. Heck... I just might have one floating around here. Bypass the system by soldering/connecting the resistor to the correct wires so we can take it from there.
randman1 is offline   Reply With Quote
Old 01-24-2006, 09:34 AM   #15
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Back in July/Aug there was a club meet and we were working in the garage on a project also. Both cars suffered from VATS problems. The result at the club meet up, was the car was stranded at a bar. Once they located the proper wires they used test leads with clips on both ends to clip to the resistors... you could probably do this temporarily to get the car out of the shop of the mechanic with no clue.
BillBoost37 is offline   Reply With Quote
Old 01-24-2006, 11:29 AM   #16
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37
Back in July/Aug there was a club meet and we were working in the garage on a project also. Both cars suffered from VATS problems. The result at the club meet up, was the car was stranded at a bar. Once they located the proper wires they used test leads with clips on both ends to clip to the resistors... you could probably do this temporarily to get the car out of the shop of the mechanic with no clue.
oh boy how i remember that night....but with that setup were were able to move the members car....
1993 SLE is offline   Reply With Quote
Old 01-24-2006, 12:12 PM   #17
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Quote:
Originally Posted by 1993 SLE
Quote:
Originally Posted by BillBoost37
Back in July/Aug there was a club meet and we were working in the garage on a project also. Both cars suffered from VATS problems. The result at the club meet up, was the car was stranded at a bar. Once they located the proper wires they used test leads with clips on both ends to clip to the resistors... you could probably do this temporarily to get the car out of the shop of the mechanic with no clue.
oh boy how i remember that night....but with that setup were were able to move the members car....
It wouldn't start or run for more than 3-5 seconds. Pushing doesn't count. Let'* get back on topic.

My point is if you can not get a good value from either key you can try resistors via jumper connections and clip them in. it'* been proven to work.
BillBoost37 is offline   Reply With Quote
Old 01-24-2006, 03:35 PM   #18
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2003
Location: Oklahoma
Posts: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Kuhl is on a distinguished road
Default

Okay get this... doesnt make any ******* sense whatsoever... I have a new key made for my car.... with the ohms reading at 480... works about 3 times... doesn't start after that. I told the mechanic that the resistance is wrong... he got another key cut with the correct resistance of 599 ohms which he says was on my original key. The new key was like 602 he says and it still didn't work. This completely perplexes me based on that chart thats above by randman. Because obviously not even my original key feel within the acceptable range of values... so wtf?

The mechanic just told me that he is going to send a fake okay signal to my ECM to get it running... wtf isnt that a little out of capabilities of the normal independent shop?

And why would that original key work for a few times with no security light on and then not if the values were that much off?
Kuhl is offline   Reply With Quote
Old 01-24-2006, 03:50 PM   #19
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2003
Location: Oklahoma
Posts: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Kuhl is on a distinguished road
Default

Well I think he got one of those bypass vats modules and is bypassing it right now and it just going to ask for the cost of the part... which isn't to bad... although I still think it has something to do with the key... at this point I really don't care as long as i get this freaking car back in time to go to my interview at medical school.
Kuhl is offline   Reply With Quote
Old 01-24-2006, 04:32 PM   #20
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

This seems that the contacts in the ignition cylinder were not making contact at all times with the key.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Dash intergration module aka body control module 2000BLKBONNEVILLE Everything Electrical & Electronic 0 09-10-2009 01:43 PM
Remote keyless entry module location? module ID? bill buttermore Everything Electrical & Electronic 12 04-28-2004 12:36 PM
Check engine light reset jebstuart 1992-1999 7 03-21-2004 09:46 AM
How do you reset Engine/Reminder Lights on an '89 SSE david 1987-1991 2 08-31-2003 12:25 AM
PCM reset Burgundy_Boat General GM Chat 12 04-09-2003 11:25 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:35 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.