Diagnostic Aids
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.
- A malfunctioning Passlock™ sensor may cause an intermittent malfunction to occur.
- If the SECURITY indicator is flashing, the BCM's Passlock™ has entered a vehicle disable state that will last approximately 10 minutes. Disconnecting the battery will not clear the timer sequence, it will resume when battery power is restored. Even if a proper Passlock™ sensor code is read during the vehicle disable period, the vehicle will not start until the ten minute time period has elapsed. After this ten minute time period, the SECURITY indicator will change from a flashing state to a solid ON state. At this time, the BCM enters the theft deterrent re-learn mode. The engine will start if the BCM detects the correct Passlock™ sensor code.
- Check for poor connections at both the BCM and the ignition lock cylinder assembly which could cause an open, incorrect Passlock™ sensor voltage signal, or intermittent malfunction.
- DTC B2958 may set in the BCM when the ignition switch is on with the Passlock™ sensor electrical connector disconnected. When BCM diagnostics and repairs are completed for DTC B3033, clear the BCM DTCs.