If the anti-theft system was activated by a problem key, would you still be able to turn the lights on ( both head lights & inside lights?)

security lockout

Step 1: Check for the anti-theft light. It's located on your dash and will have a blue or red light.
Step 2: Turn the ignition to the "on" position. Insert the key into the ignition and turn it to the on position, which activates your accessories but not the engine.
Leave the key in position for about 10 - 15 minutes.
Step 3: Check the anti-theft light again. If it's no longer blinking, turn the key back to the Off position and allow it to set for a minute or two.
This gives the system time to reset or you won't be able to start your car.
Step 4: Start the engine. Attempt to start your engine.
If it still won't start, check to make sure the battery hasn't been drained.
Step 5: Repeat the process. Try the process over again to see if it will work.
Check your key fob battery. A car's anti-theft system may activate if your key fob battery is dead and hasn't disabled the system.
Make sure the battery is installed correctly in your key fob. If the battery is correctly installed, replace it with a fresh battery

Your vehicle has two theft systems - content theft , if the door is opened without the key or keyless entry key fob the horn honks lights flash . PATS - passive anti-theft system ,this keeps the vehicle from starting if the computers don't see the right code from the transponder pellet in the head of the key .
You can turn off the content theft but not the PATS , when trying to start the vehicle does the theft light flash fast ? Red light on top of the dash .

An immobilizer is an electronic device fitted to an automobile which prevents the engine from running unless the correct key is present. This prevents the car from being hot wired after entry has been achieved.
The microcircuit inside the key is activated by a small electromagnetic field which induces current to flow inside the key body, which in turn broadcasts a unique binary code which is read by the automobile's Engine Control Module (ECM). When the ECM determines that the coded key is both current and valid, the ECM activates the fuel-injection sequence.
The immobilizer function of the Nissan Vehicle Immobilizer System (NVIS) or Nissan Anti-Theft System (NATS) consists of the following:
- NATS ignition key
- NATS antenna amp. located in the ignition key cylinder
- Body control module (BCM) or (IMMU)
- Engine Control Module (ECM)
- Security indicator lamp


Read more: http://engine-codes.com/p1612_nissan.html#ixzz3EVZorKsl

Your "inmobiliser" system is actived.

The anti-theft feature prevents the car from being started when one of several anti-theft devices is faulty are have otherwise been activated. The problem you descibe might be the ignition swith, which is known to wear out quickly on those models. The system can be completly disabled only when the car is running (meaning the teft deterent system is inactive after the Passlock II system detects the proper key in the ingition). A wire can be cut that would perminantly disable Passlock II, meaning any key that opens the door (or a screwdriver) could start the car. If the ignition swtich goes out or this wire is cut while the engine is off (theft deterent system is active) then the car will have to be towed back to the dealer to have the ignition system replaced and reprogrammed.

I have called Chevy and asked how to fix this problem. If you turn the key to the on position, right before it cranks when the lights and radio turn on. Leave it there for ten minutes until the anti theft light turns off. Then turn the key to the off position and then try starting the car.

Rumour has it that it is a yellow wire to be cut. Do more research, but D O N ' T cut it with the engine off. See first paragraph above.

Hope this help (remember rated and comment this). Good luck.

The ignition lock anti-theft switch (19A438) detects if the ignition key cylinder is broken or "slam pulled" during a theft. The ignition lock anti-theft switch is always monitored by the remote anti-theft personality (RAP) module. This allows the alarm system to be triggered in the case that the ignition lock anti-theft switch detects tampering of the ignition key cylinder (even in the event that the alarm is not active at the time).
Refer to the Section 501-14B for more details on the keyless entry remote transmitter (15K601).
The door open warning lamp switch (14018) communicates to the RAP module through the generic electronic module (GEM). This input to the RAP will cause the anti-theft alarm to be sounded if the anti-theft alarm was armed.
The door disarm switches are assembled into both LH and RH lock sets. The door disarm switch must be triggered before the mechanical lock unlocks. This is to prevent the anti-theft alarm from activating when it should have been disarmed.
The RAP module controls the anti-theft system and is the brains of the keyless entry system. The RAP module communicates with the GEM to request that the interior lights be turned ON/OFF with use of the keyless entry remote transmitter, and the GEM communicates to the RAP to inform when the door is opened. Refer to Section 418-00 for inter-module communication.
The RAP module has three wire connectors attached to it:

• The antenna for the keyless entry remote transmitter.
• 26 circuit connector (C256).
• 22 circuit connector (C257).

In addition to the perimeter alarm that uses the door open warning lamp switch, the RAP module also uses the ignition lock anti-theft switch and the autolock/relock feature to prevent theft of the vehicle. For a full description of the autolock/relock system, refer to Section 501-14B .
The THEFT LED is found on the instrument panel between the tachometer scale and the needle pivot point. The LED is illuminated during prearming and flashes when armed or triggered.
Prearming and Arming the System
The system can be armed if:

• The ignition is OFF.
• The PANIC alarm is OFF.
• All doors are closed.

There are two ways to prearm the system:

• Press the LOCK button on the transmitter.
• Open a door, press the power door lock button and close the door.

After 30 seconds the system will be armed and the theft indicator in the cluster will flash every two seconds.
Disarming an Untriggered System
An armed system will be disarmed with one of these valid actions:

1. Pressing the UNLOCK button on the transmitter.

1. Placing a key in the door and turning to UNLOCK.

1. Turning the key to RUN or ACC.

The anti-theft alarm can be triggered by the following conditions:

• The ignition cylinder is damaged with or without the RAP being armed.
• A door is opened without disarming the armed RAP module.

The remote transmitter can activate a panic alarm which is similar to an anti-theft alarm, but does not deactivate the starter or cause the theft indicator to flash.
Disarming a Triggered System
If the system has been triggered, (the horn honks, the lights flash, and an external starter interrupt relay is engaged), the system can be disarmed by:

1. Pressing the UNLOCK or PANIC button on the transmitter.

1. Putting a key in the door and unlocking the door.

1. Turning the ignition to RUN/ACC (Turning the key to RUN/ACC will not disarm an alarm that has been triggered by the ignition lock anti-theft switch.).

Some months ago I began starting the engine of my 2001 Chrysler 300M but turned it of before it really started "was sloppy with the key". The anti-theft system went on for some unknown reason. I disarmed it by disconnecting one of the battery connections under the hood with a wrench. I connected it again, the anti-theft system was off but the battery was dead. Battery was OK after recharging, I have had no trouble since then.