The Personal Automotive Security System (PASS-Key® II) is a vehicle theft deterrent system.

The PASS-Key® II prevents vehicle theft by disabling the engine from starting unless an ignition key (1) with a specific resistor pellet code is used in the ignition lock cylinder (2). PASS-Key® II is standard equipment on this vehicle.

The PASS-Key® II consists of the following components:

The ignition lock cylinder contains the resistor sensing contacts. These contacts touch the resistor pellet embedded in the ignition key. When the ignition key is inserted in the ignition lock cylinder, the resistor pellet completes the key detection circuit.

Turning the ignition switch from the OFF to the RUN position will cause the theft deterrent module to read the resistor pellet code (1). The theft deterrent module will compare the stored resistor pellet code against the ignition key resistor pellet code for a correct match.

The key detection circuits or the theft deterrent module are shorted together with a jumper wire on SEO equipped vehicles. The resistor sensing contacts in the ignition lock cylinder and the resistor pellet on the ignition key are eliminated.

In other words, the jumper wire replaces the key detection circuit that is normally found on non-SEO equipped vehicles.

Turning the theft deterrent module ON for the first time will cause it to permanently store the first resistor pellet code read across the key detection circuits. However, the theft deterrent module stays unprogrammed. This is because the jumper wires provides continuity (no resistance) across the key detection circuits.

An unprogrammed theft deterrent module performs the following actions:

SEO equipped vehicles do not have a SECURITY indicator in the instrument cluster.

For diagnostic purposes, the theft deterrent module output to the SECURITY indicator is sent the Data Link Connector (DLC) terminal 8. Connecting a test lamp between DLC terminal 8 and voltage (B+) simulates the status of the SECURITY indicator.