Programming Procedures

PROGRAMMING A NEW CENTRAL CONTROL MODULE (CCM)

IMPORTANT:
Any new Central Control Module (CCM) will automatically program to the resistance of the key (or interrogator setting) being used at the first ignition "ON" cycle. This can only be done once for the life of the module.

A new CCM is unprogrammed. Before the system will function properly after a new CCM has been installed, it must be programmed to the code that matches the customer's keys. Programming a new CCM is very simple.

1. Install the new, unprogrammed CCM.
2. Insert one of the customer's keys in the ignition lock cylinder and turn it to the "ON" position. It's a good idea to start the engine at this time to verify system operation.
3. Observe the "PASS KEY FAULT" indicator lamp:
- The indicator lamp should light for about five seconds and then go out. If the wiring or contacts to the key resistance pellet or the key is defective or intermittent and a new module is installed, the engine will start but the "PASS KEY FAULT" indicator will flash at a rate of one flash per second until the ignition switch is turned off. This indicates that the module did not program and that the system components, wiring and contacts should be checked for a fault.

CIRCUIT OPERATION
PASS-Key II(R) is a theft deterrent function which prevents the vehicle from starting if the ignition key "Resistance Code" is not recognized by the PASS-Key II(R) decoder function in the CCM.

The vehicle is prevented from starting in two ways: battery voltage from the ignition switch to the starter is disabled by a theft deterrent relay and fuel to the fuel injectors is controlled by the presence of a fuel enable signal.

When the ignition key is inserted into the lock cylinder, the CCM compares the resistance value of the key resistor pellets to the value stored in memory of the CCM. If the values match, the CCM sends a ground signal to energize the theft deterrent relay at the same time the CCM sends a modulated "Fuel Enable" signal to the PCM. When the PCM receives this signal, fuel delivery begins.

The CCM sends a control signal to illuminate a "PASS KEY FAULT" indicator on the instrument cluster during start up as a "bulb check" and also when a fault is detected in the PASS-Key(R)II System.