Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

When attempting to start the engine and the Passlock™ sensor sends a tamper signal, the BCM will take one of two actions:

If the BCM programming mode is not active AND the BCM is not in fail enable mode, then:
- The BCM stores DTC B3033 in memory.
- The BCM sends a message to the instrument cluster to flash the SECURITY indicator.
- The BCM sends a message to the PCM via Class 2 serial data link to disable fuel delivery to the engine.
- The BCM disables sampling of the Passlock™ sensor analog voltage signal for a time-out period of ten minutes.
- If the ignition switch is left on for at least ten minutes, the BCM enters the theft deterrent re-learn mode.
If the BCM programming mode is active AND the BCM is in fail enable mode, then:
- The BCM stores DTC B3033 in memory.
- The BCM sends a message to the instrument cluster to turn on the SECURITY indicator.
- The BCM will send a message to the PCM via Class 2 serial data link to enable fuel delivery to the engine allowing the engine to start.