security light on?

When this no start happened was the security light on solid or flashing?Also check out this guide which can help reset the system.

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please run down this guide and report back.

Thank you. The codes were from a residential diagnosis tool (bought at Costco) plugged into the dash input on the drivers side. Only codes were cylinder misfire and trans fluid code. Did not note the fuel or temp guage, but the door locks and the keyless entry did not work.

So was the security light on solid or flashing when it wouldnt start?Also next time take note of anything inop when it fails to start.Also has the body control module been scanned for codes after a no start incident?

Now the car is working. I will definately make a note of the items you brought up. I did not notice the security light. I think it did flash initially when the car started along with the rest of the dashboard. Thanks for your notes about what to look for next time. The last time this happened was 2 years ago, so hopefully it is another 2 years before it happens ago. Does it makes sense that unplugging the battery terminal would reset the computer system? Like a Windows reboot?

It would be more like when your cell phone locks up which is called logic lock.You then have to turn it off and on again to reset it.They are craming more and more in a smaller and smaller package these days.Even the new radios are getting logic lock these days and the onstar computers as well.Keep me posted and we will go from there.

The security light keeps blinking and I cannot lock the doors with the remote because of this and the alarm keeps going off occasionally too. never happened before.

Got this from "Repair Guides" at the top of every 2carpros page.

https://www.2carpros.com/articles/how-to-reset-a-security-system

Return with good news!

The Medic

the security light comes on, and also the service light has been coming on as well. makes my inside lights blink on and off

You need to have the computer scanned for the check engine light. However, the security light can leave you stranded. It needs to be checked by a dealer to see what it causing it to come on.

After driving for about 30 minutes the security light starts to flicker. The dashboard lights, radio & headlights flicker also. The door locks stop working. If I continue driving the other indicators on the dash are affected. The service engine soon light and wrench light comes on. The temp gauge, gas gauge and tach go dead but the car still runs. When attached to a scanner at my mechanics the computer is recognized by no data can be retrieved from my car. I have to drive a 4 hour trip very soon. Can you help me figure out what is wrong and how to fix it. Will I be safe? Can the security system be disabled.

It sounds like u have a bad body control module that's more then just ur security system.it's the computer that controls ur door locks keyless entry fuel Gauge inside lights pretty much everything ur describing that's not working.thats really the only thing that makes sense bad body control module when they fail they do crazy stuff like that.ur best bet is take it to ur Saturn dealer and tell them what's happening when u replace the body control module it has to be programed by there service stall.it's not a big job to change them.I wouldn't make that 4hr drive without having that fixed it will leave stranded eventually it's only a matter of time before that part of it fails to starting and running functions.let me know how it goes and what they find.I have seen alot of those fail and on the ls model saturns as well they fail the same way I have a bunch of old tester body control module because of the high failer rate.good luck to u.

I have a 2003 Saturn Vue. The security light has been on and off for the last year. It does not affect starting gauges or any other accessory. I ran my tech 2 to check for dtc, but did not come up with any. No codes stored in the bcm. I replaced the ignition. My GM tech tool was hooked while driving and waited till the security light came on before I checked for codes.

The info was cut off above so i couldnt see it all.Could you please explain it again?Also does the gas gauge temp gauge power door locks keyless entry ever become inop?

I have a 2003 saturn vue. The security light has been on and off for the last year. No problems in starting or any gauges or anything that is wired into the body control module. I scanned with my gm tech 2 and came up with no codes. Security light was on when I hooked up my tech 2. I have replaced the ignition cylinder with new key assembly and passlock sensor. Still light comes on and off. I also replaced the tin connector on the passlock sensor with a copper coated connector. Ive been reading more articles on this and should check the passlock sensor voltage with car off and igition in run condition.Gm mechanic states it is common for the harness off the passlock sensor to the bcm has a tendency to get high resistance. Any more troubleshooting ideas?

So you replace the ignition housing that contains the pass lock sensor.

Yes, still security light comes on, but no electrical problems.

Heres what i found for security light always on or flashing when it comes back on follow the trouble tree i posted.

Thanks I will give that a try.

Alright let me know what you find most of the ones i have seen like that have been a bad pass lock sensor but those set codes or a bad body control module.

Ok, I ran the test with my tech 2 and commmanded the security light on and off. It works fine. According to a 28 year gm vetereran mechanic the voltage at the run position (with car off) should be at least 5.0 volts, mine was 4.75. Do you have any more specifications. I think I need to clean contacts at the bcm and check for high resistance in the passlock harness.

I did e diagnostic on my Saturn Vue because when I drive the security light turn on and turn off immediately. They could find anything wrong, but they believe the problems is caused by the module and they gave me a code B-1327. I will like to know if anyone knows what this means and how much will cost. Thank you

There is no way of telling how much it will cost without following the trouble tree i posted.That code has nothing to do with the pass lock system though.I have seen that code caused by a bad battery though or someone that left there light's and ran the battery down.
B1327 - Device Power 1 Circuit Low

Schematic


CIRCUIT DESCRIPTION
Battery voltage is supplied to the OnStar Communication Interface Module (CIM) by circuit 1640. This input is internally monitory by the CIM for proper operating voltage. The minimum voltage for proper operation is 9.0 volts , if circuit 1640 drops below 9.0 volts , this DTC will fail. DTC B1327 will remain current until system voltage is above 9.5 volts for 1.2 seconds . Under 8.5 volts , communication with OnStar system using scan tool will be disabled.

DTC PARAMETERS

* Voltage on circuit 1640 is between 8.5 - 9.0 volts for 1.2 second s
* Illuminate the red OnStar LED.

DIAGNOSTIC AIDS

* Check for poor connections at the CIM and instrument panel fuse block. Inspect harness for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals and poor terminal-to-wire connections (terminal crimped over insulation).
* If fault is suspected to be intermittent, moving harness wiring may help in locating fault.

TEST

Diagnostic Chart

Thats only .25 volts that could be meter error connection error your meter leads etc.You can try checking connections wires etc that wouldnt be a bad thing.The strange part is there are no codes setting.

The security and service light come on and off when the please. But when the security light flashes the car will not start until it stops flashing. I have put the car on a computer and got a couple of codes. But im not sure what they are. I would put them on here but I do not have them on me right now. IF you could help that would be great Thank you.

Try this it may help
GM PASS LOCK RELEARN- Ignition to "run" position, try to start and let key return to "run" position
Approx ten minutes security light will go off
Turn key "off" and wait 5 seconds
Repeat 2 more times for a total of 3 relearns.
Turn key off, then start it
this will let the BCM relearn the security key

In 2007 car would not start disconnected battery and re connected and it did but security light was on. Had extended warranty dealer replaced security system no problem until today. I was at the store came out would not start disconnected and reconnected battery still no. Gave it a jump and it started security light was on. Got home went in house and minutes later went out and tryed it and it started no security light. Do you think it would be the security system again, twice in 7 years?

Anything is possible but since you had to have it jumped to start it then i would make sure the battery cable's are clean and tight and have the battery and alternator tested and go from there.If you still had trouble with the security light coming on then i would have the body control module scanned for code's.

The service engine light has been on, but occasionally the service with a wrench light will come on and when it does the car will not gain speed. Also after driving will idle high (around 3 rpm) when in park. So far on three different occasions while driving the security light will come on and the car loses all power for about twenty seconds then goes back to normal. Any ideas?

It sounds like the car is going into limp mode but to be sure lets run the codes to see what comes up. here is a guide to help us:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.