Recent Topics
Adding HD to my comp...
by daves66nova
13 minutes 17 seconds ago
Big brothering by Discount Tires
by grampi
50 minutes 15 seconds ago
Toyota 0w 20 in a 2014 Honda DI engine
by silverado1
Today at 07:26 AM
What do worn valve seals look like?
by Spetz
Today at 05:37 AM
4 Bean Soup
by Char Baby
Today at 05:24 AM
Whay diesel oil turns black immediately after chan
by DibroTeam
Today at 02:15 AM
I need some advice
by sky06
Today at 01:24 AM
My 15 year old filter
by SubieShane
Today at 12:01 AM
Using a little hot-rod tech on industrial equip
by DoubleWasp
Yesterday at 11:48 PM
Headlight Questions
by SubieShane
Yesterday at 11:43 PM
Vinyl record cleaner
by whizbyu
Yesterday at 11:32 PM
King Kong NAPA 1459 filter to replace PH8/FL1
by DoubleWasp
Yesterday at 11:07 PM
Newest Members
dougout, CDot, mazarnelli, poiyt, VAzx6R
51314 Registered Users
Who's Online
77 registered (3800Series, 2009Edge, 951Indy, barkingspider, Asterix, 11 invisible), 1479 Guests and 217 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51314 Members
64 Forums
219300 Topics
3460568 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Topic Options
#3430284 - 07/20/14 02:38 PM GM Passkey III didn't require programing?
Falcon_LS Online   content


Registered: 10/03/08
Posts: 3488
Loc: Kuwait
So I lost the master key for my Envoy, so I got a new fob and coded key from the dealer. They asked me to come back tomorrow for programming, so I figured I'd do it myself.

I put the new uncoded key in the ignition and turned it on - five seconds later the security light went off. I cranked the engine and it fired right up! I tried the 2nd memory key and it fired right up. Am I missing something here?
_________________________
00 Pajero: M1 0W-40/26300-35503
01 Marquis: M1 ESP Formula 5W-30/FL820S
05 Envoy: M1 ESP Formula 5W-30/51522XP

Top
#3430325 - 07/20/14 03:25 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
Trav Offline


Registered: 11/20/06
Posts: 9601
Loc: MA, Mittelfranken.de
Try leaving the Master in the house and try it.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
#3430331 - 07/20/14 03:39 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
eljefino Online   content


Registered: 06/15/03
Posts: 23892
Loc: ME
Maybe someone put in a remote starter and it has a bypass module you don't know about. Did you get it new?

Top
#3430345 - 07/20/14 03:56 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
Falcon_LS Online   content


Registered: 10/03/08
Posts: 3488
Loc: Kuwait
Trav - same thing. shrug

I bought it off the original owner who never changed/added anything.

Based on what I've read, it appears I have a Pass-Lock system, which to my understanding is different than Pass-Key. To my understanding, there is no chip in the key - which explains why it cost $10 for a Genuine GM key vs. $30 for my Ford PATS key - the key is just used to make contact between the tip and the base of the ignition cylinder. The resistor is apparently located in the ignition cylinder itself. Maybe that explains why.
_________________________
00 Pajero: M1 0W-40/26300-35503
01 Marquis: M1 ESP Formula 5W-30/FL820S
05 Envoy: M1 ESP Formula 5W-30/51522XP

Top
#3430360 - 07/20/14 04:15 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
dishdude Offline


Registered: 11/14/08
Posts: 3273
Loc: Phoenix
Passlock just checks to make sure there is a key in the cylinder, passkey III has a transponder chip in the head of the key and requires programming. Is there any marking on the blade of the key such as PK3 or a circle with a + in the center?

Top
#3430370 - 07/20/14 04:26 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
Falcon_LS Online   content


Registered: 10/03/08
Posts: 3488
Loc: Kuwait
No markings on the key.
_________________________
00 Pajero: M1 0W-40/26300-35503
01 Marquis: M1 ESP Formula 5W-30/FL820S
05 Envoy: M1 ESP Formula 5W-30/51522XP

Top
#3430422 - 07/20/14 05:36 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
dishdude Offline


Registered: 11/14/08
Posts: 3273
Loc: Phoenix
No marking on the key means it is a Passlock system, no programming necessary.

Top
#3430606 - 07/20/14 08:34 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
itguy08 Offline


Registered: 09/15/11
Posts: 1537
Loc: Central PA
Originally Posted By: Falcon_LS
the key is just used to make contact between the tip and the base of the ignition cylinder. The resistor is apparently located in the ignition cylinder itself. Maybe that explains why.


So what exactly is this system supposed to prevent? Hot wiring can still be done - just put any old key in there....
_________________________
Mine:
2010 Taurus SHO, 79k, dealer oil and filter
2011 F150 SuperCrew, 50k, Penzoil Platinum, Motorcraft filter

Hers:
2003 Escape, 145k, QS Defy

Top
#3430672 - 07/20/14 09:13 PM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
George7941 Offline


Registered: 05/10/05
Posts: 1466
Loc: Toronto, Canada
Hot wiring will not work on Passkey systems since there are Hall effect sensors in the ignition lock cylinder and the BCM must see the pattern generated when the ignition key is turned normally, else the BCM does not enable fuel.
_________________________
2006 GMC Sierra 4.3l, NV3500,G80 locker rear, Formula Shell Synthetic 5W30, Wix 51036, Dexcool.
1987 BMW R80

Staying out of the right lane a lot.

Top
#3430838 - 07/21/14 06:15 AM Re: GM Passkey III didn't require programing? [Re: Falcon_LS]
eljefino Online   content


Registered: 06/15/03
Posts: 23892
Loc: ME
^ yup that.

Deliberately confusing terminology on GMs part. But, they still get credit for putting passlock on the cheaper cars-- it still deters theft.

Top
#3430862 - 07/21/14 07:04 AM Re: GM Passkey III didn't require programing? [Re: George7941]
itguy08 Offline


Registered: 09/15/11
Posts: 1537
Loc: Central PA
Originally Posted By: George7941
Hot wiring will not work on Passkey systems since there are Hall effect sensors in the ignition lock cylinder and the BCM must see the pattern generated when the ignition key is turned normally, else the BCM does not enable fuel.


That makes better sense. Thanks.
_________________________
Mine:
2010 Taurus SHO, 79k, dealer oil and filter
2011 F150 SuperCrew, 50k, Penzoil Platinum, Motorcraft filter

Hers:
2003 Escape, 145k, QS Defy

Top