How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Vladgmru Your Own Question

Vladgmru
Vladgmru, Automotive Electrician
Category: Cadillac
Satisfied Customers: 2510
Experience:  I've been working with American made cars since 1992.
12883947
Type Your Cadillac Question Here...
Vladgmru is online now
A new question is answered every 9 seconds

Hello, I have security problems on a 99 Cadillac Deville.

Customer Question

Hello,

I have security problems on a 99 Cadillac Deville. This is what I need to do:

" * Unplug the connectors from the TDM/BCM and carefully cut D8 (Fuel Enable or Serial Data) and C11 (Starter Relay Enable) close to the connector; then strip back the insulation on the 2 wires.
* Strip out half centimeter of insulation from D5 (Ignition +12V) and C1 (Ground) - do not cut those wires as they are also inputs to the BCM.
* Connect the pink wire (D5) to T1 on your circuit; then the dark blue wire (former D8) to your output T3, and finally the other 2 wires (C1 and C11) together to T2. "

I need to know:
1. If the car's TDM is integrated in the BCM.
2. The color and positions of the wires.
3. Location of BCM or TDM if not integrated.

Much obliged,

Eli
Submitted: 4 years ago.
Category: Cadillac
Expert:  Vladgmru replied 4 years ago.
Hello and welcome to JustAnswer.
My name is Vladimir.
This procedure does not apply to your Deville. You car does not have a Theft Deterrent Module, the Instrument Panel Cluster does these functions.
You car uses a PASS-Key® II.

When a key is inserted in the ignition, the contacts located in the ignition cylinder contact a resistor pellet located in the key. The instrument cluster (IPC) measures the resistance of the key pellet. The IPC then compares this value to a value stored in the IPC's memory. If the values match, the IPC allows engine to start.

If the values do not match, the IPC does not provide ground to the starter relay and sends a request to the PCM ( engine computer) to disable fuel injectors control.

These vehicles are well known for ignition lock cylinder issues.

You should measure the resistance of your key and then make sure you get the same stable reading at the connector C202 ( terminals E12 and E13, base of the steering column) even when you turn the key through the all positions. If your reading is unstable, then replace the ignition lock cylinder.

 

 

Customer: replied 4 years ago.
As, I've mentioned, I've alrady tested the lock cyl wiring, and the problem is not there. As a locksmith, I have experience fixing/ypassing the VATS on these vehicle, when the fault is with the ignition cyl/ignition cyl wiring but this is not the case here. If you can supply me with an answer to what ive asked ill be greatful.
Expert:  Vladgmru replied 4 years ago.
I can help you resolving the problem of you car, but I can't supply you with information that does not exist.
Your Caddy does have a BCM but it has nothing to do with the security system.
Your Caddy does not have a TDM.
All the terminals and wires you mentioned in your first question do not match to waht your vehicle has.
If you are sure you have a security issue, you can try to bypass the Passkey system by connecting a resistor of the same value ( as your key) to terminals E13 and E14 at the C202 connector.
Customer: replied 4 years ago.
If this is where the wires from the ignition go, like I've already said, I tried that already to no avail. This car would have a TDM, it just might be integrated with the BCM.
Expert:  Vladgmru replied 4 years ago.
Yes, C202 connector is a large connector where the wires from ignition switch go.
Sir, I do not want to argue, please just believe me that your caddy does not have a TDM.
If your ignition key has a pellet resistor, then this system does not utilize a TDM and it has nothing to do with the BCM. The BCM controls many things but it wouldn't prevent engine from starting.
You said you had security problems on a 99 Cadillac Deville.
Could you explain what the problems are?
Customer: replied 4 years ago.
This is what I'm trying to do:
Newrockies.ca
I've already tested the wiring and tried bypassing with the resistor, which things that I've done before on other cars. On this, the problem is deeper.

If you can take a look at that site and provide me with clearer instalation info, its worth more than 30 dollars for me.
Expert:  Vladgmru replied 4 years ago.
I have checked this website .
The function of the TDM is incorporated into the IPC.
1) The "Starter Relay Enable" wire is the Yellow'/Black wire that could be found at the IPC connector C2 terminal A8.
2)The "Class 2 Serial Data" wire is the Purple wire that could be found at the IPC connector C2 terminal B5 or C3 terminal D1.
Now you can perform the advices from this website.
Hope it works for you.
Vlad.
Vladgmru, Automotive Electrician
Category: Cadillac
Satisfied Customers: 2510
Experience: I've been working with American made cars since 1992.
Vladgmru and 2 other Cadillac Specialists are ready to help you
Expert:  Vladgmru replied 4 years ago.
Thank you for accepting my answer.
Please let me know the end of the story.
If you need more information concerning this issue, you can always come back and reply to this thread.
Good luck.
Vlad.
Customer: replied 4 years ago.
I will. At the moment I'm still trying to gather all the components for the bypass unit. If you can send me a diagram for the port and a rough description of where it is, ill greatly appreciate it
Expert:  Vladgmru replied 4 years ago.
What are you calling "the port "? Do you mean a connector of the IPC?
Please clarify it
Customer: replied 4 years ago.
I mean the place where the wires are located and a good way to identify the correct wire. How do I identify the ipc? Is it the part the ignition wires go to? Ipc connector c2 terminal b5 (and so on) doesn't help me much if I don't know where the ipc is and don't have a diagram of it.
Expert:  Vladgmru replied 4 years ago.
IPC stands for Instrument Panel Cluster. It is a device in front of a driver that contains speedometer , tachometer, warning lamps, and gauges. :-)).
Of course the IPC connectors are located at the back side of the IPC, so remove the IPC in order to get to the connectors and wires.
Click >HERE< to download the IPC connectors pinout ( it is a.pdf file).
Customer: replied 4 years ago.
hi vlad. Turned out i didnt do it on that car, oe not yet anyway... I do need similar information for a 95 Impala.
Does it have a seperate TDM or is it imbdded in the IPC/BCM?
If it does, where is it?
Wiring diagrams.
Is it a passkey 1 or 2?
How do I pay you from this thread?
Thank you
Expert:  Gm Tech (Cam) replied 4 years ago.

Greetings and Welcome to Just answer. Vlad is offline.

This is a new question so I shall answer you. I have been working with Luca on those systems.

The TDM is a stand alone system and is left of the brake pedal along with the Theft enable relay beside that. It is passkey 1. (VATS)

graphic

 

Expert:  Vladgmru replied 4 years ago.
Hi,
Gm Tech (Cam) has already answered your question so I am not going to interfere in this thread.
If you need something from me, please let me know.
Regards,
Vladimir.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • Dave Nova

    Cadillac Technician

    Satisfied Customers:

    1469
    ASE Master Certification. GM World Class Certification
< Last | Next >
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Cadillac Technician

    Satisfied Customers:

    1469
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/JF/JFN1/2011-2-26_33039_180754101501129867381533152761315265045893127711n.64x64.jpg Jerry Newton's Avatar

    Jerry Newton

    Cadillac Technician

    Satisfied Customers:

    1181
    ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
  • http://ww2.justanswer.com/uploads/PE/peterpete190/2012-2-24_1274_20120215135406.64x64.jpg Pete's Avatar

    Pete

    Cadillac Technician

    Satisfied Customers:

    1133
    15 years Cadillac experience as a technician.
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    ASE Certified Technician

    Satisfied Customers:

    941
    ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    595
    ASE Master Tech 15+ Years
  • http://ww2.justanswer.com/uploads/MO/molurch/2012-6-6_214526_500.64x64.png Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Cadillac Technician

    Satisfied Customers:

    462
    GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
  • http://ww2.justanswer.com/uploads/tsmodie/2009-6-10_144056_tim.jpg Tim Mohr's Avatar

    Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    385
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL