On my dashboard the security icon has been flashing on and off and I didnt really think anything about it. Well, last Friday after work, my car wouldnt start. I got it towed to my mechanic and he said that the security icon is probably not reading the key when I try to start it. He said I need to take it to a dealer and let them work on the computer. Has anyone ever had this experience and what did you do to fix it? Or any sugguestions? Its a 99 2door tahoe, Thanks!
Security Icon is Flashing
- Thread starter tedward
- Start date
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I dont think it actually reads the key, there is a resistance in the ignition switch that has to be seen. If it does not, it shuts off the fuel pump for 10 minutes.....tamper mode.
foreverfalcon40
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I HAVE THE SAM ******* PROBLEM!
Bypass it sounds good! Will it **** up my aftermarket alarm?
Bypass it sounds good! Will it **** up my aftermarket alarm?
My aftermarket alarm has the bypass!!! That is how I know about it.
Used for the remote start, since the key is not turned.
SunlitComet
OBS Jedi-Do Good
Most after market alarm come with bypass circuitry that can be wired in. There is also trouble codes associated with the security system. I would suggest having someone with the right scanner look for a problem. Would you like some symptom related diagnostic for the time been which might help?
Hey all, I definitely have this SECURITY / Passlock II issue as well on my 98 Yukon. My situation may be a bit more unique than others though. Hoping some of you can chime in on whether I even need to replace my sensor since it is already bypassed with a Directed Electronics module (part of my remote start installation).
This morning, I got the dreaded blinking SECURITY light and fuel cutoff indicating a bad Passkey II value sent to the computer. Despite all efforts, I could not get the truck started and had to hitch a ride to work.
About two months ago, I had tore down my remote starter and bypass module wiring. I confirmed that the ignition yellow wire had the same resistance value as my bypass module. I then proceeded with SOLDERING all connections, thinking my problem may have been related to faulty wiring.
The truck ran fine since then and I really believed I had resolved this. However, recently I'm being haunted by this.
So, my questions here are:
Is there any way to confirm without a doubt the resistance value the computer is programmed with outside of testing what the ignition switch has? Maybe I'm off a few ohms...
How does the ignition switch come into play when a bypass module is installed. Isn't that the point of having one - so you don't have to rely on the ignition switch anymore?
If my bypass module is 'dialed-in', why am I still getting a SECURITY light!?
This morning, I got the dreaded blinking SECURITY light and fuel cutoff indicating a bad Passkey II value sent to the computer. Despite all efforts, I could not get the truck started and had to hitch a ride to work.
About two months ago, I had tore down my remote starter and bypass module wiring. I confirmed that the ignition yellow wire had the same resistance value as my bypass module. I then proceeded with SOLDERING all connections, thinking my problem may have been related to faulty wiring.
The truck ran fine since then and I really believed I had resolved this. However, recently I'm being haunted by this.
So, my questions here are:
Is there any way to confirm without a doubt the resistance value the computer is programmed with outside of testing what the ignition switch has? Maybe I'm off a few ohms...
How does the ignition switch come into play when a bypass module is installed. Isn't that the point of having one - so you don't have to rely on the ignition switch anymore?
If my bypass module is 'dialed-in', why am I still getting a SECURITY light!?
