OK so I'm a body man not a Caddy mechanic. I bought an 04 CTS 3.6 automatic WRECKED in the front.
The salvage yard hooked a jumper up to it and started it for me the day I looked at it. It wouldn't idle due to the tube to the mass airflow sensor being knocked off but it ran. I trailered it home, hooked up the mass airflow sensor and tried to jump it and it wouldn't start. Key stuck in ignition/shifter stuck in park/service anti-theft light on. Came here and read all the low battery voltage posts and replaced the battery with new.
After jacking with it for HOURS, I finally got it started and it ran fine, even backed it off the trailer. Turned it off and now it's the same ole key stuck in the ignition, won't shift out of park syndrome. There are several messages on the info screen such as Service Anti-Theft, Check headlamps, coolant low, etc but some of these are to be expected since the headlights and radiator are broken.
I unhooked the battery again and unplug/replug all sort of fuses, loosen and retighten all the grounds in the engine compartment I could find and checked the harnesses externally for any damage which I found none other than the windshield washer fluid level sensor wires severed, no big deal.
Suddenly after checking the fuse boxes under the rear seat and wiggling the relays the thing starts, shifts and the key comes out. GREAT!!! I thought I had it fixed but the next day it's back to the same key stuck/stuck in park, won't start, service anti-theft mode again!!
I borrow a Tech II and hook it up. When I go to check codes it says unable to communicate with the vehicle and to check the connection and ignition on/off. I'm running the Tech II with the ignition on,duh.
I'm stumped why the Tech II will not communicate let alone why the key/shifter stuck/service anti-theft crap. Any suggestions where to start looking?
I'd greatly appreciate any help and unlike some other posters I always come back and post the solution to hopefully help others.
I can get the Tech II again if needed.
One other bit of info, It looked as though the wires to the C103 connector on the right side of the engine were pinched in between the shock tower and ECM harness. I looked this up on the GM service website and the connector has two wires, a blk/wht that goes from the battery negative to the DIM and another wire that is blunt cut somewhere in the harness according to GM. The supposed blunt cut wire looked pinched near the connector and had a single strand of wire protruding from the sheath, this wire supposedly serves no purpose, should I be concerned with it? The blk/wht wire next to it, whick serves as the ground to the DIM looked undamaged.
The salvage yard hooked a jumper up to it and started it for me the day I looked at it. It wouldn't idle due to the tube to the mass airflow sensor being knocked off but it ran. I trailered it home, hooked up the mass airflow sensor and tried to jump it and it wouldn't start. Key stuck in ignition/shifter stuck in park/service anti-theft light on. Came here and read all the low battery voltage posts and replaced the battery with new.
After jacking with it for HOURS, I finally got it started and it ran fine, even backed it off the trailer. Turned it off and now it's the same ole key stuck in the ignition, won't shift out of park syndrome. There are several messages on the info screen such as Service Anti-Theft, Check headlamps, coolant low, etc but some of these are to be expected since the headlights and radiator are broken.
I unhooked the battery again and unplug/replug all sort of fuses, loosen and retighten all the grounds in the engine compartment I could find and checked the harnesses externally for any damage which I found none other than the windshield washer fluid level sensor wires severed, no big deal.
Suddenly after checking the fuse boxes under the rear seat and wiggling the relays the thing starts, shifts and the key comes out. GREAT!!! I thought I had it fixed but the next day it's back to the same key stuck/stuck in park, won't start, service anti-theft mode again!!
I borrow a Tech II and hook it up. When I go to check codes it says unable to communicate with the vehicle and to check the connection and ignition on/off. I'm running the Tech II with the ignition on,duh.
I'm stumped why the Tech II will not communicate let alone why the key/shifter stuck/service anti-theft crap. Any suggestions where to start looking?
I'd greatly appreciate any help and unlike some other posters I always come back and post the solution to hopefully help others.
I can get the Tech II again if needed.
One other bit of info, It looked as though the wires to the C103 connector on the right side of the engine were pinched in between the shock tower and ECM harness. I looked this up on the GM service website and the connector has two wires, a blk/wht that goes from the battery negative to the DIM and another wire that is blunt cut somewhere in the harness according to GM. The supposed blunt cut wire looked pinched near the connector and had a single strand of wire protruding from the sheath, this wire supposedly serves no purpose, should I be concerned with it? The blk/wht wire next to it, whick serves as the ground to the DIM looked undamaged.