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Unlimited Key Mode




Spare Key Programming - Unlimited Key Mode





Enabling Unlimited Key Mode

NOTE: Vehicles with Integrated Keyhead Transmitters (IKTs) were originally equipped with IKTs manufactured by Huf. Replacement IKTs made by Strattec will work correctly, but may look and feel different. It is recommended that IKTs be replaced with the same manufacturer's keys. Rotunda will supply matching keys by the same manufacturer if they are ordered by vehicle.

NOTE: The unlimited key mode is available only on vehicles equipped with Integrated Keyhead Transmitter (IKT) keys. Vehicles equipped with Intelligent Access (IA) keys do not have this feature.

NOTE: Unlimited key mode is intended for use by those customers who need more than 8 keys for their vehicle.

NOTE: Before programming, the new key(s) must have the correct mechanical cut for the ignition lock cylinder(s).

NOTE: The unlimited key mode is set up by creating a special, unique unlimited transponder security key code and programming this key code into all of the vehicle keys so they contain the same key code.

1. The customer must choose an 8-digit number (except for 00000000 or 00000001) to be programmed to all of their vehicles keys (or, to all of the keys they want programmed to one vehicle). All customer vehicles keys (or all keys for one vehicle) need to use the same number. Valid digits are 0-9 and the letters A-F.

2. NOTE: If the Instrument Panel Cluster (IPC) PID UNL_KEY_ID is not available, unlimited key mode is turned on, and must be turned off before viewing the stored code. To change the stored code (or to disable the stored code), follow the procedure for disabling the unlimited key mode below.

Monitor the IPC PID UNL_KEY_ID and compare its value against the code chosen in Step 1. It should not be the same key code.

3. From the scan tool, enter TOOLBOX. Select BODY-SECURITY-PATS Functions and follow the on-screen instructions to ENTER SECURITY ACCESS. For additional information, refer to Anti-Theft Security Access - Integrated Keyhead Transmitter (IKT) Integrated Keyhead Transmitter (IKT).

4. Once in security access, select: "program unlimited key code" and follow the on-screen instructions. Enter the 8-digit code chosen by the customer in Step 1 of this procedure and follow the on-screen instructions.

5. Select: "unlimited key mode ON" and follow the on-screen instructions.

6. Select: "Ignition Key Code Erase" and follow the on-screen instructions.

7. Disconnect the scan tool and turn the ignition key to the OFF position (the key does not need to be removed at this time).

8. Turn the first Passive Anti-Theft System (PATS) key in the ignition lock cylinder to the ON position for 3 seconds (6 seconds if it is an IKT key).

9. Turn the first PATS key to the OFF position and remove the key from the ignition lock cylinder.

10. Insert the second PATS key into the ignition lock cylinder and turn the key to the ON position for 3 seconds (6 seconds if it is an IKT key).

11. The vehicle should now start with both PATS keys.

12. If it is desired to program additional key(s), refer to Key Programming Using Two Programmed Keys - Integrated Keyhead Transmitter (IKT) Integrated Keyhead Transmitter (IKT) for each additional key that needs to be programmed.

Disabling Unlimited Key Mode

NOTE: By disabling the unlimited key mode, the previous access code no longer operates the vehicle.

1. From the scan tool, enter TOOLBOX. Select BODY-SECURITY-PATS Functions and follow the on-screen instructions to ENTER SECURITY ACCESS. For additional information, refer to Anti-Theft Security Access - Integrated Keyhead Transmitter (IKT) Integrated Keyhead Transmitter (IKT).

2. Select: "unlimited key mode OFF" and follow the on-screen instructions.

3. Select: "Ignition Key Code Erase" and follow the on-screen instructions.

4. Disconnect the scan tool and turn the ignition switch to the OFF position (the key does not need to be removed at this time).

5. Turn the first PATS key in the ignition lock cylinder to the ON position for 3 seconds (6 seconds if it is an IKT key).

6. Turn the first PATS key to the OFF position and remove the key from the ignition lock cylinder.

7. Insert the second PATS key into the ignition lock cylinder and turn the key to the ON position for 3 seconds (6 seconds if it is an IKT key).

8. NOTE: With the unlimited key mode turned off (disabled), a maximum of 8 keys can be programmed into the IPC using the Key Programming Using Two Programmed Keys - Integrated Keyhead Transmitter (IKT) Integrated Keyhead Transmitter (IKT) procedure. The IPC PID SPAREKEY must be enabled. This switch is set to ENABLE when the vehicle is built.

If it is desired to program additional key(s), refer to Key Programming Using Two Programmed Keys - Integrated Keyhead Transmitter (IKT) Integrated Keyhead Transmitter (IKT) for each additional key (up to 8 keys, total) that needs to be programmed. The IPC PID SPAREKEY must be enabled. This switch is set to ENABLE when the vehicle is built.

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