Enabling Unlimited Key Mode

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Unlimited Key Mode is intended for use by those customers who need more than eight keys for their vehicle.

The 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.
Note: If the PID: UNLIMITED TRANSPONDER KEY ID is not available, Unlimited Key Mode is turned on, and must be turned off before viewing the stored code. At this time, unlimited keys may be programmed to the vehicle. To view/change the stored code, follow the procedure for turning off Unlimited Key Mode below. Check the PID: UNLIMITED TRANSPONDER KEY ID and compare its value against the code chosen in Step 1.
Using the diagnostic tool, select PCM from the menu. Follow SECURITY ACCESS to obtain security access. For additional information, refer to ANTI-THEFT SECURITY ACCESS .
If the Unlimited Transponder Security Key PID was 0000, select Active Command: SET UNLIMITED TRANSPONDER KEY. Enter the 4-digit code chosen by the user.
Select: ENABLE UNLIMITED KEY MODE.
Select: IGNITION CODE ERASE.
Disconnect the diagnostic tool and turn the ignition OFF.
Program two ignition keys to enable the vehicle.
Program any additional keys using either KEY PROGRAMMING USING TWO PROGRAMMED KEYS or KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT .