’07 cobalt trouble remote starting

This was supposed to be a cakewalk- a bare bones cobalt- no OEM remotes- manual locks etc-- no need to hook up starter wire- I am bypassing PK3 with another key - this is not the issue-- the car will not crank when remote started 90% of the time-- I have had it crank - start and run about 6 times-- but most of the time it turns on ignition and accessory together- then accessory drops out-ignition stays on-- but NOOOOO cranking- I have watched it work and I have watched it not work- I know I have the right wires- yellow for ignition, brown for accessory- and I know the PK3 is not an issue- because I have had it start with my "key in the box" bypass as well as with the OEM key in the ignition- It seems to only crank when it wants to- - I have it on tach mode- and when it does decide to crank and run it runs fine- problem is it just doesn't want to crank most of the time-- I have also tried two separate brain boxes- I am using a RS 900 VII from Crimestopper-- thanks for your help....

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Brcidd - Engineer That Does Remote Starter Installs on the side.

Maybe it has the passlock II set up along with PK3. The diagram from audiovox will show you how to bypass passlock on Cobalt and you will need the transponder to be activated also.

https://documents.audiovox.com/700122.pdf

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The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya

I think it has more to do with the timing of the accessory drop-out-  My key has just a circle with a plus sign (+) in it-  but the car will start and run once out of about ten tries- If it were a passlock or transponder problem- the security light will flash-- I have already tested for that-- with no key near the ignition- the security light flashes- with key near there it goes off after initial on- same as when starting with the key--- I have also tried hot wiring the ignition and accessory wires- then dropping out the accessory- it acts just like the R/S does-- there must be a 2nd ignition timing issue or something going on-  I have been doing all my recent testing with no bypasses- just leave the OEM key in the ignition in the off/lock position...it does as I described- starts about 10% of the time....

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Brcidd - Engineer That Does Remote Starter Installs on the side.

I would use a fortin CANSL2i version 12 on this car. The Cobalt, G5, G6, Malibu are all the same. If you have this new CANSL2i version 12 this car uses configuration 15. THis car DOES have PK3 AND Passlock.

I installed a Fortin CAN SL2  version 12.0 firmware on an Avalanche- I have the instruction sheet config 15 in front of me- it says "not compatible with 2007 + vehicle models" (I take this to mean 2007, 2008 models)  this is not a CAN SL2i - maybe there have been changes- my instruction sheet is dated 06/11/2007  which is fairly recent.

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Brcidd - Engineer That Does Remote Starter Installs on the side.

The only thing that "Not Compatible" applies to is the data wire for keyless at the BCM. You can just use the purple and purple white wires off the CANSL2 and connect them to the lock and unlock wires off the starter your using.

I usually use the module when I can-- but this is a family member's car- and funding is an issue- I see now that the resistor needs to be involved in the start circuit- so I will wire it in with the two relays as advised above-- Sometimes it is good to learn why you use the module- doing it the hard way makes you appreciate the easy way-- and makes you understand what is going on---The fact that it was starting 1 out of ten times was puzzling me---but I was not using the resistor circuit at alll- this must be the problem.   Thanks again for all your help.

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Brcidd - Engineer That Does Remote Starter Installs on the side.

PKUGM2X by Bypasskits
 will takje care of both bypasses and the price is very minimal.

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Luis
Sound Waves
Is up to the installer to test all wires with a DMM whenever possible.

I saw that one on-line- considered it- but it was still $65 one place, $75 another-- Heck,  the modules are actually more than I paid for the R/S unit.  For the same money I could have used the trusty CAN-SL2-  Thanks again......

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Brcidd - Engineer That Does Remote Starter Installs on the side.

You don't need the resistor circuit if you can mess with your accessory timing. Cut your ign wire from your remote start and put a jumper on one end (not the ign wire in the car) and remote start it. As soon as your remote start activates the acc circuit, reconnect that jumper and the car will start everytime as long as you do that process. Code alarm has a 2 relay tech tip for this, but I don't have it offhand sorry.

I just wired mine like described in link below and it works great- it is also a two relay (and one resistor) method-- although I would like to see the tech tip you describe- always wish to learn---- funny thing though- when I was checking the resistance when I cut the WHITE/ blk wire and turned the key to crank position-- the car still started-- I had expected it not to start with the OEM resistor circuit cut-- so I truly believe it is a timing issue-- especially since it was randomly R/S starting for me even before I knew about the resistor circuit .  Thanks for all your help

https://documents.audiovox.com/700122.pdf

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Brcidd - Engineer That Does Remote Starter Installs on the side.

Here ya go I found it:

https://documents.audiovox.com/700813.pdf

This has worked on most newer GM vehicle I've done that didn't want to seem to crank - even when using the PKG9 or PKG7 bypass. You should be able to get away with just this diagram and a key in the box on the G6, cobalt, malibu etc. Had to use it on an 08 vue the other day, and then an 08 equinox didn't need it. Just random but when you find one that won't crank, worth a shot. And see my earlier post for the quick way to see if this diagram will solve your problem.