Circuit Operation

(NOT USING PKE TRANSMITTER)
UNIVERSAL THEFT DETERRENT (UTD)
Arming
The arming sequence begins when Ignition is "OFF" and one of the doors is opened. The "Security" indicator will flash "ON" & "OFF." When one of the Door Locks is moved to the "LOCK" position, momentary voltage is applied to terminal "C4" of the Central Control Module (CCM), gray connector. The "SECURITY" indicator will stop flashing but remain "ON." When the door is closed, ground is removed from terminal "C12" (LH Door) or terminal "D16" (RH Door) of CCM, gray connector. The system is now armed, and the "SECURITY" Indicator will remain "ON" for a few seconds, then turn "OFF."

Cancellation
The system may be canceled by moving either Door Lock to the "UNLOCK" position before closing the door. When moving to the "UNLOCK" position, a momentary voltage is applied to the CCM unlock input, terminal "C5" (gray connector), thus disarming the system.

Disarming
The system may be disarmed by turning either outside Door Lock Cylinder to the "UNLOCK" position using the Door Key.

This applies ground to terminal "D15" of the CCM, gray connector, thus disarming the system.

Tampering
With the system armed, the Horns will sound "ON" & "OFF" if:
^ Either door is opened without key.
^ Hatch is opened.
^ Key is put in Ignition.
^ Park Lights/Headlights turned "ON."
^ Power Door Switch is moved to "LOCK" or "UNLOCK" position.

In addition to the Horns sounding, the Starter Enable Relay will be disabled; the Engine Control Module (ECM)/Powertrain Control Module (PCM) will not receive a Fuel Enable signal on the Serial Data Lines from the CCM to allow fuel injector pulses to begin; and the PASS-Key Ignition Key will not be recognized.

The arming and disarming sequences are slightly different when using the Passive Keyless Entry (PKE) Transmitter instead of the Power Door Lock Switch and Door Key. Refer to Keyless Entry for a detailed circuit description. Keyless Entry

Pass-key(R)
Resistor sensing contacts are located in the Ignition Key Lock Cylinder. These contact the Resistor Pellet on the Ignition Key when it is inserted. The Pellet resistance is read by the CCM by comparing it to a fixed resistance. A two-way connector connects the sensing contacts of the Ignition Switch to the CCM.

If the Key Pellet is the proper resistance, terminal "F4" of the CCM, green connector, grounds the Starter Enable Relay to energize it and allow Engine cranking. At the same time, a signal is sent to the ECM through the Serial Data Lines to allow fuel injector pulses to begin.

If the Key Resistor Pellet is the wrong value, there will be no outputs from the CCM to the Starter Enable Relay or the ECM. This state will last for approximately 3 minutes, even if a proper key is inserted. After the 3 minute wait, a proper key can be inserted to start the Engine.

If a problem is detected with the PASS-Key(R) System, the Security Indicator will be illuminated by the CCM.