I followed all the things it says to check in the fsm to test the system. My ignition switch is good. Sending continuity when i put in the key but i get no beeping from the securty chime when i open the door and leave the key in the ignition. Also every once and a while the seatbelt light will flash while driving for no reason. Last night when i was driving i pushed my foot on the panel where the security ecu is and the horn beeped. When i took off the panel i found the plug for the securty system loose and just fell out. After i put it back in i got happy and thought my securty system will work. I was wrong. Also i think the security light flashed once in like 2 weeks i've had the car. System will not arm if i lock the doors. Is there anyhting else i can do to test my the cpu itself? Is there a fuse that maybe blown or something. I have ran out of ideas.

 

are you locking the doors correctly???

To arm the system you must have the key on- then off, then get out, lock the latch switch (the switch on the inside of the door that locks the doors from the inside) and close the door with the exterior handle held up.

then it will arm about 30-60 seconds later

 

yes... I did that according to what the fsm said. I have no idea what the guy did to this car before i bought it. There was what looked like anouther car alarm airhorn setup under the hood. It wasn't hocked up though. I'm so lost. i hope i didn't get screwed with this car.

 

year, model???

 

sorry 91 5spd coupe na... I had a break through kindof. While waiting for a reply a i wanted to fix my power door locks that didn't work. I folowed the rebuild guide posted a few days ago and it worked great. Now when i start the car the security beeps at me a dims the seatbelt light on and of for no reason or set interval. Both seat belts are buckled top and bottom. Does this help at all. I'm so stumped. u tied to set the system again but to no avail.

 

hehe that was my guide go figure, seems like you're in the same boat as me.

See, I can't get my security light to light up at all, when I hold the handles up, I hear it click inside the car somewhere (I assume the hatch) but the beep never comes.

The seat belt icon blinking on and off means something, most systems in the car have a self diagnositcs (blinking), just record the sequence here and someone can tell you what it means (like long, short, short, long)...etc

 

ok hears what happens. Start the car. Seat belt lights blinks and beeps every 2 seconds. If i connect the lap belt the beeping stops and lights dimmly flashes every second. Then i went to get out of the car an the battery just completly drained and the seatbelt stopped half way. The interior lights are dimmly lite. Why is this happening. I need this car to be my daily driver. :-(

 

ok so remeber how the battery drained. Well i had my friend me pop start it and it wouldn't start. Then all the suuden full power back on without any recharge from alt or battery charger. Is there something like a ground or something that could be cousing these misterious draining and security system failure? Where are the main grounds or what page and section are they on in the fsm.

 

Yes, as a matter of fact, that's probbaly why it was disabled in the first place, see if you can talk to the previous owner.

The only real way to check and see what's draining the battery is to break out the volt meter hehe.

Start with the obvious, take off each battery cable off the batery, get a post cleaner (the ones that actually slide over the post are what I like best, you just twist and it torques any crud off) and then the flip side I use which is almost like a tooth brush all the way around I use to clean the clamps, then apply dieletric grease (spelling?) and see if that helps any, I know it helped me out a lot when it came to the car charging while driving down the road or at a stop.

Now, my first generation, we went through a battery, alternator, and finally it ended up being the ground wire was loose and would drain the battery so one day when I was driving down the road the car just stopped, found the cause in about three minutes (my dad did anyways).

*Edit - After seeing the last of your post, check my last section of this post*.
- Tech

 

well its dark now so ill have to give it a quick check tom. Between school and work i only have saturday night and sunday to work on my 7. I guess ill have to look at the fsm to see where all the grounds are. Oh ya after the whole battery draining and then just coming back like nothing ever happened my seatbelt light still blinks but no beeping. I'm getting worried this car is shot becouse of the hack job the pevious owner did on the harness. Any other suggestions on fixing the security system will be great jic all my grounds are ok.

 

ok where can i find a guide to cleaning up my ground wires? This fsm is hard to read..LOL.. I tried searching for a bit but dont know what title i should search a link would be great.

 

I was wondering if the flashing light is the security system telling me there is something wrong. Maybe one of the sensors for the trunk or the hood are not functioning right and it thinks the hood is open and it is warning me. Is there a diagnostic system in within the security ecu that i can get codes from? If it thinks the hood is open then maybe thats why it wont arm. Could this be the case or am i just talking out of my really desperate to get my car working ***.

 

ok seems like im talking to myself but anyway. I just took out the ecu. The black box by the driver kick panal. It says Jfc01 on it. I checked and all solder points look good. Guess its not that. Can anyone comment on wether it might be a bad switch for the hood or something. Also what could be causing the beeping and seatbelt light flashing?

 

The seat belt light???

The seat belt light is in the idiot light/clock panel and would have nothing to do with the security system. If the seat belt light is flashing there is a problem with the mouse belts.

And what beeping??? You said before you were not getting a beep when you locked the last door from the inside.

The CPU is the body computer and would be the black box you unplugged. The majority of the security functions on a S5 are in the top plug of the CPU. The ECU is the engine computer. But you can not see a bad joint in the CPU with the naked eye, unless it is really really really bad

 

1)I read somewhere that the seatbelt light is activated through the security system. That would explain why the car beeps and flashes the seatbelt light in sync. I already made jumper wires to bypass the sensor for the seatbelts under the center console. So i dont think thay are giving me any problems. IS there anouther sensor on the seatbelt system im not aware of?

2) the car has power locks so i only need to lock the driver for both of them to lock. I hear no beep at all. The only beep i get in the whole car is from when the seatbelt light flashes in the idiot panel.

3) that makes sense because usually the ecu has a hard metal case and i was puzzled why this was plastic. So there is a separate one for the engine. Good to know.

Know where does that leave us?
1)What the heck could be making my seat belt light flash and beep at me?
2)What should i do about the solder points seeing as you cant see if the are bad. Can i just remelt them and let them set again or do i have to remove the solder and start over? The ones i should focus on are the ones that hold the pins for the connectors correct?
3) Any comment on if a bad hood sensor could be the cause of the security system not coming on. Can i just jumper the wire going to the sensor. If i jumper it would it make it think it was open all the time or closed all the time?
4) I think im going to reground my car according to rotaryRessurection next weekend. Would a reground only help a 3800rpm hesitation? My car doesn't seem to have a problem with that but maybe it will help my cpu to work better.

 

got some free time in between class. Just wondering if i coul djust remelt the solder and therefor fixing any cracked connections?

 

ok icemark. Do you still have the s5 cpu on your site? If so can i send you $40 and my cpu and can you send me that one just for a faster turn around time? Maybe i can have it by this weekend. If not i will still send you the $40 and my cpu for a rebuild. Are you able to test my cpu on anouther s5 before you repair it to see if the security system works on that car. Also can you test it afterwards?
Thank You
Email is Driftin8ez@msn.com
if bussiness is not aloud to be discussed on the forum.

 

Driftin8ez,

I have an '88 vert with the security system. I do like Icemark was telling you, and the security light on the console behind the shift comes on for about 30 seconds, the system beeps when I press down the second lock button and get out, but as far as arming, I am not sure that it does, on mine, at least. I do have that grounding problem that Icemark was telling you about, because I had it on several days as it is not my daily driver, nor do I have to drive every day and when I went to start it, the battery was just dead. So, I know that I have a grounding problem. Not only did that happen, but my clock on the idiot light cheering section does not come on all the time (it does keep fairly accurate time, though) and the low gas light comes on almost as soon as I fill the car up, which tells me that the grounding is not consistent, especially since these things will change after going over small and large bumps. My suggestion is to find the thread about grounding and try that, but I will defer to whatever Icemark suggests.

 

ya i just bought soem wire and 'm going to redo my pos. and ground wires this sunday. I'll put everything on hold until then.
Thanx for the help so far. You will be hearing from me again sometime on sunday.

 

PM me or email me for the CPU rebuild info if you would like me to do it and we can discuss costs, etc.

But as far as the system, the beeps you are hearing and the seat belt light are unrelated to the factory security system.

A couple of things can cause the system not to arm. Hatch/truck not closed, doors not closed, ignition key not on and then off, hood not closed. Door latch sensors not working, key in the ignition (even if it is in the off position).

Of course if you lock the door with the key it would never arm as well.

 

Ok i was just checking the service manual and reading about the cpu. I found something wierd. I have connector D meaning there is something behind it becouse i opened the cpu. Also what was wierd was that i dont have something for connector C. Is this usual. I thing i have a 91 GXL. I have 4pot brakes, leather power roof, rear seats. Now if im reading the manual right only canadian models had connector D and all models should have connector C filled. Here is attachment of the page. it is page 32 in the body electrical section if you want to check online.

 

1: the seat belt sensor wire may be loose or your not getting a good conection (under your seat or in the cpu.

2: its a good idea to take it out and look at all the points, you can just solder over them but it would be better to remove the old solder and re-do them all

3: not sure on that one, if you wire it closed i would think that it would think it was closed. but i don't know i have an 86 GXL and they didn't come with the security system so i couldn't tell you for sure.

4: bad grounds are were most of the problems lie in 2nd gens. so regrounding it wouldn't hurt, it could only make it better

hope these help you, get back to me on how it went

 

Well to start with, there is no such thing as a 91 GXL. You have a 91 Coupe with the A package. You may wish to read the options and standard features sticky thread found at the top of this section.

regardless the connectors vary based on model and version.

Your CPU should be a FC01 cpu regardless.



and it is pretty hard not to have anything for connector D, as your turn signals and hazard lights would not work without it. If they work, then you are confusing connector D with Connector C. The table however has them reversed to the plug pointers to the diagram.

And finally- your bump has been deleted. Bumps are not allowed here. Do not bump again or I will close the thread.

 

Wow, I never knew how my alarm worked until I read this. Now my broken cd player won't get stolen! Thanks Icemark!

 

*update just installed a custom ground kit according to rotary resurrection and my car starts in one try. Also haven't experiance sudden battery drain. Cpu needs a rebuild becouse mt security system still does not work. Hope the cpu rebuild helps.