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I seem to be a magnet for weird problems!

Up now is a B3055 VTD Key Not Present ( Security light is on steady ) - I have others but more on those later - The B3055 is always history. Following the system check step 1, I don't have a scan tool so I had to skip that. Step 2 asks if there are any DTC's stored - yes - I'm directed to the DTC list. Still playing along with the SM - Step 1 under DTC B3055 asks if I did the system check - yes - Step 2 - I tried all the vehicle keys, all keys (2) start the vehicle, I clear the codes, cycle the ignition, and Security light immediately illuminates and code B3055 resets history using either key. Then it directs me to replace the VTD module BUT it ( the SM ) is thinking the vehicle will not start.

I disagree ---> I'm thinking the ignition cylinder is defective - BUT - why does it start? One time only when I removed the key, the key in reminder chimed and I had to put the key back in and remove it B4 the reminder would stop, although I didn't try shutting the door first.

How many votes for VTD module?

How many votes for Ignition cylinder?

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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There seems to be a failure of logic in the VTD, so I would look there first. But I wouldn't buy the part until I was sure.

I strongly suspect that you will need a GM speedometer shop to program a replacement VTD. Such a shop would be able to use their code readers to look into the VTD.

The regular shop manual does not present the details of the security systems. Only repair of the keyless entry is given i the regular FSM. DTC B3055 is given in the list but no diagnosis or repair procedure is linked to B3055 in the regular shop manual.

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Jim I was using book 1 - pg 8-979 but it is assuming there is a no start condition, it has never failed to start but the security light is on steady. I am able to set the alarm and it will activate and show the code 40 ( theft attempted ) if I open the door.

I'm thinking the pass key reader exciter (8-958) isn't reading/seeing the key in, but even more curious is why the vehicle starts if it doesn't see the key. I could be turning it with a screwdriver as far as the computer is seeing. I'm also curious why the DTC 3055 is never current, even if I don't rotate to start it still shows as history.

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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HI, I just searched our archives and there is some discussion of the B3055, I don't know how helpful it will be. I believe you really need a Tech 2 to properly diagnose this. These types of problems are very difficult to diagnose, I had a security problem on my 02 Monte Carlo that drove me crazy. Good Luck.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thanks Mike,

I will look in the archives again but I think the ones I looked at were a no-start condition. I won't take it to the local Cad dealer as they are the ones you've warned me about ;)

The other nearest one is 100 miles away....

John

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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Well I dont know if I have warned you about the dealer at all.....just the third party mechanics that dont have direct experience. I think this type of problem rises to the dealer if you pull your hair out enough ;-)

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Unless it's something simple like a key, either replacement will no doubt require a Tech2 for the vehicle to "learn" the new part. I want to diag myself cuz I don't want to pay for someones education experience at $140 an hour, and have it "Shotgunned" which is the MO for the local Cad dealer.

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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Unless it's something simple like a key, either replacement will no doubt require a Tech2 for the vehicle to "learn" the new part. I want to diag myself cuz I don't want to pay for someones education experience at $140 an hour, and have it "Shotgunned"  which is the MO for the local Cad dealer.

I hear ya, I have a key problem right now on a 98, the owner keeps going out trying to get a new key from a locksmith.   The key he has never gives him trouble, the key he has made states NO KEY......the locksmith says he needs to go to the dealer to have the lock replaced, HUH?......if the key he has works, why wouldn't an EXACT replacement work?   Sometimes I don't think people have common sense. 

 

Good Luck with this, see this

https://www.youtube.com/watch?v=FuPDvhJHZPo

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I don't like bypass but that is a good idea for a "temp" fix to get ya going - shows ingenuity

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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I dont either, but I thought I would show it to you. There may be info in those threads about relearn procedure also

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thanks again Mike, time to regroup and think like an electron.

I'm cleaning grounds - started at the battery and worked my way back to the G400 - G404 ones, found a couple of gnarley ones but no fix. Also found out I don't fit into a trunk as well as I used to :P:blush:

John

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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I hear ya,

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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UpDATE - I cleaned the G-100 grounds ( most of them anyway - I didn't clean the one by the front mount ) and when I first started it the security light was out, :yupi3ti: No codes, (even did a Tiger Woods fist-pump) It idled for about 4-5 mins and I turned it off. When I restarted it.........

NOW, I get the security light on steady. :wipetears Service Theft System displays, but no DTC's... :glare:

I ran out of daylight and the dinner bell rang so tomorrow (maybe) I'm going to clean G200 & G201 recheck fuses, then redo the system check.

In doing the research I discovered the new VTD module can be replaced and it will learn the password on the first key cycle. :)

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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Thanks for the update. Odd that you would not get a code.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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BBF - maybe your friend that is having extra keys made is going to someone that doesn't match the Passkey chip. He should try a real locksmith, or perhaps an Ace Hardware store that makes duplicate of Passkey chipped keys.

I'm not sure that the IPM can display a problem lamp without storing a code. I do know that not *all* the codes are always displayed when you run them from the A/C buttons. The security-related codes are probably not available without a Tech II with locksmith security codes.

I had a fob programmed for my wife's 1999 Pontiac once, at a locksmith. He had something that worked like a Tech II but it was a locksmith's tool, not a full-up Tech II. All it did was program fobs and keys and locksmith stuff. It worked on multiple makes.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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He went to a locksmith that measured the resistance and supposedly matched it with a blank. Its the second time the locksmith made the attempt. The next time I see my friend I plan to measure the resistances myself. I am hoping his ohm meter is off.

Security issues on my Monte Carlo is what made me want a tech 2. Having one makes diagnosing so much easier with the diagnostic trees in the FSM

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Mike, did your guy do the key relearn? Insert key, turn to run - don't start - wait ten seconds, remove key, insert any other keys within ten seconds, to be programmed repeat as needed up to 10 keys.

Y'all will be happy to know that the B3055 is back, came up today after the third start. I didn't get a chance to do anything else..

John

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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Thanks John for the info on the relearn. Does a new key need relearning even though its the same resistance.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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To my knowledge yes, I look at it as telling the car which keys are okay to let in. I'm not all that sure how precise the readers are though. There has to be a plus or minus range built into the logic I'm thinking.

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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It depends on what you mean by "the same resistance." Some keys use chips that are actual logic chips, not resistors, and I suspect that they will nearly always need re-learning. If the key has the right resistance, re-learning should not be necessary. Table from FSM:

Passkey_Resistors.jpg

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Thats what I am thinking Jim, this is a 98 and unless I am mistaken its a resistance key. If the locksmith chose a key with the same resistance I was thinking the security system would see it as the same key and no relearn would be required. But since each resistor has a tolerance I suppose if the reader is accurate enough the reader would see differences between keys due to tolerance differences.

That sensitivity certainly would provide more than 15 different key sensitivities delivering a greater level of security. This is what you are implying John.

John you having been a GM tech where do we get detailed passkey operation/specs? I need to get into my 96 manual. Anyone know when the passkey generations change? Meaning, is the 98 passkey the same as my 96's passkey system?

I need more information on the passkey systems it drives me crazy not to fully understand them. Heck instead of fixing them people are actually developing work arounds that fool the system.

I need a Tech 2 asap

Thanks for that resistance chart Jim where did you find it?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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The service manuals are great but they lack the in depth system operational explanations that help in diagnostics. When new "systems" are introduced GM will do classes at GM training centers for dealership techs to attend, they are not mandatory, as a GM tech you sign up and attend. The materials, components, classroom vehicles ( that they can produce errors on ) and class instruction provided in those classes are the "edge" that those techs have over the person that has the service manual only. This is why the bigger dealership techs "specialize" in certain areas of repair. Smaller dealerships usually don't specialize.

I don't know if there is a resource thru GM training for these old class materials or not. Try this PDF for some more information. http://my.cardone.com/techdocs/pt%2077-0011.pdf I don't know if this is what you are looking for but it is good stuff to have.

jim, I just went to a locksmith yesterday because I wanted to get a key cut from the key code (not a copy) as the old ignition keys were very loose in the reader. The locksmith cut the key and did a very brief key learn procedure which consisted of old ignition key in start vehicle, remove old key insert new key start vehicle and said "there you go". I checked codes B2960 current - invalid key code. I didn't have time to wait for another key, so now I have to go back. I'm thinking this is what happened to Mikes' friend. The locksmith even got the resistor "match" from the dealership by sending them my VIN.... I tried to tell the locksmith the procedure, but he "knew how to do it" - as it turned out - maybe he didn't...

Cadillacs ARE special :)

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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BTW Mike - when you get your tech2 - can I borrow it ?????? I'll bring it RIGHT back ;):):yupi3ti::hatsoff:

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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Thanks for that info John, I found that yesterday and saved it, so you can see I have been searching for why a key copy does not work. So let me ask, if the key blank is the correct resistance and is cut mechanically correct can it still not work? The reading I have done in the manual tells me that only one key can be learned, so I am afraid that if I do a relearn on the new key, the original key won't work..

It seems that you are having the same issue with the key you had made yesterday, so I am interested in how you resolve that.

The factory service manual is terrible in its description and diagnosis of the passkey vats system.

John, with regard to the Tech 2, a former member here ruined it for you, I sent a member a timesert kit that was used once and he never returned it. Foolish of me I know with no security deposit. You live and learn. But you seem to be a good guy (so did he) so I might be apt to take the risk again

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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