Security Indicator Operation - Pass-Key II

The PASS-Key II system controls the SECURITY indicator. In normal operation, the PASS-Key II module controls the lamp only when the ignition is ON. There are four PASS-Key II system bulb modes as follows.
1. Bulb Check. When the ignition is first turned on, the SECURITY indicator illuminates for approximately five seconds to indicate the system is operating correctly. Refer to the following bulb symptoms, if the bulb check does not operate.
2. Bulb Stays Illuminated and Engine Starts. If the SECURITY indicator stays illuminated after the engine starts, this is an indication that the PASS-Key II module is reading an open, short or incorrect resistance value. Verify that the PASS-Key II module connection at the base of the steering column is properly connected and that a good ignition key is being used.
3. Bulb Stays Illuminated and Engine Does Not Start. If the SECURITY indicator stays illuminated while and after attempting to start the engine and the engine does not crank or start, this indicates that the PASS-Key II module has sensed an improper key value and has disabled the engine and set the disable timer. This specifically does not mean that the key sense circuit is open or shorted to chassis ground, refer to "Bulb Flashes and Engine Does Not Start". Remove the key from the ignition and verify that is the correct key code for the vehicle. The key code may be checked using tool J 35628-A and comparing the key code to that of other keys for the vehicle. After waiting approximately 3 minutes for the disable time to expire and the SECURITY indicator to go out, try to start the engine with a known good key with the proper key code.
4. Bulb Flashes and Engine Does Not Start. If the SECURITY indicator flashes once per second and the engine does not start, this indicates that the PASS-Key II module sensed an open, a short or otherwise invalid (value matched none of the available 15 key codes) input from the ignition key resistor input. The PASS-Key II module does not start the disable timer during this operation mode. This operation mode could also be caused by a malfunctioning power or ground circuits.