Key won't turn on 2005 saturn vue

Jeff provides the best answer.

• Jeff Armer Jun 03, 2022
• Does the key turn to the off position an to start an back to off again,gear shifter is in park ?
• 
  Jeff Armer Jun 03, 2022
  Ignition Key Cannot Be Removed from the Ignition Lock Cylinder
  
  Is the vehicle equipped with a manual transmission?
  
  Turn the ignition key to the OFF position.
  
  Can the key be turned to the OFF position and be removed?
  Go to Step 8
  Go to Step 5
  
  5
  Verify the adjustment of the automatic transmission shift cable. Refer to Range Selector Lever Cable Adjustment .
  
  Can the key be turned to the OFF position and be removed?
  System OK
  Go to Step 6
  
  6
  Inspect the Steering Wheel Theft Deterrent Lock.
  
  Does the Steering Wheel Theft Deterrent Lock exhibit damage or signs of wear?
  Go to Step 10
  Go to Step 7
  
  7
  Verify the electrical operation of the ignition lock cylinder solenoid. Refer to Ignition Can/Cannot Be Turned Off with Transmission in Any Gear .
  
  Can the key be turned to the OFF position and be removed?
  
  8
  Inspect for a faulty lock cylinder.
  
  Is the lock cylinder damaged?
  Go to Step 11
  Go to Step 9
  
  9
  Inspect the ignition lock cylinder case.
  
  Is the case worn, damaged or loose?
  Go to Step 12
  Go to Step 13
  
  10
  Replace the Steering Wheel Theft Deterrent Lock. Refer to Steering Wheel Theft Deterrent Lock Replacement .
  
  Did you complete the repair?
  Go to Step 13
  --
  
  11
  Replace the ignition lock cylinder. Refer to Ignition Lock Cylinder Replacement .
  
  Did you complete the repair?
  Go to Step 13
  --
  
  12
  Replace the ignition lock cylinder case housing. Refer to Ignition Lock Cylinder Case Replacement .
  
  Did you complete the repair?
  Go to Step 13
  --
  
  13
  Operate the system to verify the repair.
  
  Did you correct the condition?
  

Vehicle Theft Deterrent (VTD) Description and Operation
The vehicle theft deterrent (VTD) system functions are provided by the theft deterrent control module. When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the theft deterrent control module. The theft deterrent control module then compares this value to a value stored in memory, learned key code. If the value is correct the theft deterrent control module sends a random generated number to the transponder, this is called a challenge. Both the transponder and the theft deterrent control module perform a calculation on the challenge, if the calculations match the theft deterrent control module sends the fuel continue password via the serial data circuit to the Engine control module (ECM). If either the transponders unique value or the calculation to the challenge is incorrect the theft deterrent control module will send the fuel disable password to the ECM via the serial data circuit. The components of the VTD system are as follows:
• Theft deterrent control module
• Engine control module (ECM)
• Ignition key (Transponder)
• Ignition lock cylinder
• Security indicator
Theft Deterrent Control Module
Vehicles with steering column mounted ignition switches have the exciter integral with the theft deterrent control module which is located within the steering column. Vehicles with instrument panel mounted ignition switches have exciter modules separate from the theft deterrent control module with the vehicle wiring harness connecting the two. The theft deterrent control module for vehicles with instrument panel mounted ignition switches is located within the instrument panel. The theft deterrent control module can learn up to ten keys (transponder values).
The theft deterrent control module uses the following inputs, battery voltage, ignition switched voltage and ground circuit. The theft deterrent control module uses the following outputs, password exchange with the ECM, fuel continue/disable via the serial data circuit.
When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the theft deterrent control module. The theft deterrent control module then compares this value to a value stored in memory, learned key code. If the value is correct the theft deterrent control module sends a random generated number to the transponder, this is called a challenge. Both the transponder and the theft deterrent control module perform a calculation on the challenge. The theft deterrent control module then performs one of the following functions:
• If both the transponder value and the calculation to the challenge are correct, the theft deterrent control module will send the fuel continue password to the ECM via the serial data circuit.
• If either the transponders unique value or the calculation to the challenge is incorrect the theft deterrent control module will send the fuel disable password to the ECM via the serial data circuit.
• If the theft deterrent control module is unable to measure the ignition key transponder value for one second due to a damaged or missing pellet or a damaged exciter, the theft deterrent control module will send the fuel disable password to the ECM via the serial data circuit.
Important: On some vehicles, If the VTD system is unable to read the ignition key transponder value after the vehicle has started, the VTD system will consider itself malfunctioning. The VTD system will enter a fail enable state and will command the security indicator to illuminate. When the VTD system is in a fail enable state the vehicle will NOT stall or stop running. If the VTD system is in a fail enable state when the ignition is switched OFF, the VTD system will remain fail enable until it is able to read a learned ignition key transponder value. When the VTD system is in a fail enable state the VTD system is NOT active and the vehicle will start. This feature is NOT available on all GM vehicle lines.

there is one wyre you can cut coming from the computer check itrenet taht will disable antitheft everything else will work properly that will let you no if it is the anti theft

Hi!

I thing following happened: when the steering wheel is moved just a little bit with NO key inserted, it will lock itself (that's some common anti-theft measure).
In order to get it unlocked, you have to insert the key and gently push to rotate it while you also gently move the steering wheel left and right untill the lock is released.

You might have ruined thee anti theft part in the ignition. If so, the car won't start, but all other accessories will still work. Plus the "security" light should be on. Here is a link for that. http://vatspasslockpasskeysecurityhelp.yolasite.com/

This is probably the ignition lock cylinder worn out or getting old. The TDM is most likely not locking the key in, but new cars are pretty tied into themselves. For now, just try leaving the key in. Use another one for the doors. Some cars have a small hole under the steering wheel/column that you can stick a pen or something in to release your key. Maybe just be ready for something else breaks, then you'll know what is wrong.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

it has a anti theft locking steering wheel column you have to put the key in then turn the string wheel to the left or right hard and while still holding the steering wheel turn the key. and next time fyi if you turn the steering wheel after the key is not in the ignition it will lock to prevent theft.

the key may be worn badly or the ignition needs to be replaced.

It was very likely that the problem turning the key was due to the steering column lock mechanism. Sometimes when you lock the steering wheel, if you the mechanism will bind up, making it difficult to unlock the ignition with the key. Often when this happens, you will be parked on a hill with your wheels agains a curb or some such item. Once you turn the wheel hard to the right (or left), the pressure is released on the locking mechanism, and the key will turn easily. This is a similar situation to what can happen in an automatic if you park on a hill without the parking brake.
try doing this:
pop the off the circle piece around the ignition and the holster cover under the steering wheel.
that ought to work.

Is your steering wheel locked? Turn the key as much as you can, then turn the steering wheel and see if it releases the lock. You should be able to completely turn the key after this.