Unlimited Key Mode

Enabling Unlimited Key Mode

NOTE: Unlimited Key Mode is intended for use by those customers who need more than eight keys for their vehicle or the same key into multiple vehicles.

1. Customer must choose a 4-digit, non-0000 number that will be programmed to all of their vehicles. All customer vehicles need to use the same number. Valid digits are 0-9 plus the letters A-F.

2. NOTE: If the PCM PID: UNLIMITED TRANSPONDER KEY ID is not available, Unlimited Key Mode is turned ON, and must be turned off before viewing the stored code. While ON, unlimited keys may be programmed to the vehicle. To view/change the stored code, follow the procedure for turning off Unlimited Key Mode.

Check the PID: UNLIMITED TRANSPONDER KEY ID and compare its value against the code chosen in Step 1.

3. Using the scan tool, select PCM from the menu. Follow SECURITY ACCESS to obtain security access.
4. If the Unlimited Transponder Security Key PID was 0000 (or different from code chosen in Step 1), select Active Command: SET UNLIMITED TRANSPONDER KEY. Enter 4-digit code chosen by user.
5. Select: ENABLE UNLIMITED KEY MODE.
6. Select: IGNITION CODE ERASE.
7. Disconnect scan tool and turn ignition keys off.
8. Program in two ignition keys to enable vehicle.
9. Program any additional keys using either Key Programming Using Two Programmed Keys or Key Programming Using Diagnostic Equipment.

Disabling Unlimited Key Mode
1. Using a scan tool, select PCM from the menu. Follow SECURITY ACCESS to obtain security access.
2. Select: DISABLE UNLIMITED KEY MODE.
3. Select: PROGRAM UNLIMITED XPONDER security key command. Enter any four digit code that is non-zero (to prevent future vehicle owners from knowing fleet code).
4. Select: IGNITION KEY CODE ERASE.
5. Disconnect scan tool and turn ignition key to OFF.
6. Program-in two keys to enable vehicle.
7. Program any additional keys using either Key Programming Using Two Programmed Keys or Key Programming Using Diagnostic Equipment.