Code B333: Loss Of (Sir) Data: Notes
WARNING: This page is about a different car, the 1990 Buick Riviera and 1990 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
Code B333 will be set if communication between DERM (SIR controller) and BCM is lost. When this code is set, ELECTRICAL PROBLEM and INFLATABLE RESTRAINT warning lights will illuminate.
NOTE:
Test numbers refer to numbers on diagnostic chart.
Test Number 1) Checks if other data line components are experiencing communications problems.
Test Number 2) Checks status of data line at compass module. Normal data line voltage is .1-4.5 volts.