Monte Carlo V6-3.4L VIN E (2000)
When turning the ignition switch to the start position with the proper key, the Passlock sensor generates an analog voltage signal. This signal is sent
through the Passlock detecting circuit. This analog voltage signal is of a specific value to the vehicle, and varies from vehicle to vehicle. When
attempting to start the engine, the BCM compares a preset stored analog voltage value with the signal coming from the sensor. Because both values
match, the BCM sends a fuel enable password via the Class 2 serial data link to the Powertrain Control Module (PCM). As a result, the PCM enables the
crank relay, and allows fuel delivery to the engine.
When attempting to start the engine by means other than using the proper key in the ignition switch, the Passlock sensor sends an analog voltage signal
of a different value. The BCM compares the preset stored analog voltage value with the signal coming from the sensor. Because both values do not
match, the BCM sends a fuel disable password via the Class 2 serial data link to the Powertrain Control Module (PCM). As a result, the PCM disables
the crank relay, and does not allow fuel delivery to the engine.
Retained Accessory Power (RAP)
The Retained Accessory Power (RAP) feature allows the operation of the following functions for 10 minutes (or until a vehicle door opens) after the
ignition switch has been turned from the ON or ACCESSORY position to the LOCK position:
^
The radio
^
The power windows
^
The power sunroof (if equipped)
Refer to Keyless Entry System Operation in Retained Accessory Power (RAP) for more information.
