Question about 2003 Cadillac CTS
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Posted on Jan 02, 2017
SOURCE: 2003 CTS ANTI-THEFT ON DASH
The anti-theft device of your car (officially known as the PASSLOCK II key
based engine disabling system) is triggered and it's doing what it's supposed to do - it prevents the car from moving by cutting the power to the engine's ECM and blocking the lever of the transmission. If you can't disable it then it's faulty.
The only thing you can do is to reset it: put the key in the ignition, turn it on to just before cranking and then leaving it that way for 10 mins. If this doesn't fix it then you will have to have the car towed top a dealer. They will inspect the system and fix it: if you're lucky all it will needs is a full reprogramming - this will cost you around $200; if you're unlucky the module itself is faulty and it will have to be replaced and reprogrammed, at a cost of around $1000.
Posted on Dec 18, 2010
This comes from personal experience on my Mother's '03 Impala. Apparently the chip in the key died. Tried the spare key that came with the car and it all works again. If this solves your problem (as it did mine) just go to your dealership and have a new key cut.
Posted on Dec 31, 2010
Tips for a great answer:
The ignition switch is turned to the RUN or the START position.
When the ignition switch is in the RUN or the START position, the current flows from the B/U Lamp fuse located in the underhood bussed electrical center (UBEC) through CKT 839 (PNK) to the park/neutral position switch. The park/neutral position switch also feeds the backup lamps portion of the switch. With the transmission in the PARK position, the current flows to the BTSI fuse located in the underhood bussed electrical center (UBEC) through CKT 275 (LT GRN). The current then flows to the TCC/stoplamp switch through CKT 584 (LT GRN/BLK). The current continues to the BTSI solenoid through CKT 1135 (DK GRN/WHT). The ground path is provided through CKT 1850 (BLK) to G207. When the brake pedal is depressed, the normally closed contacts in the TCC/stoplamp switch open and the current flow is interrupted. When the current flow is interrupted, the BTSI solenoid de-energizes. The transmission may then shift to another gear. When the transmission shifts to another gear (except PARK), the contacts in the park/neutral position switch open. This condition stops the current flow to energize the solenoid when the brake pedal releases.
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