Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 20 (THEFT DETERRENT SYSTEM)DIAGNOSTIC TESTSDTC B3031: CONTROLLER IN LEARN MODETESTING
2004 Oldsmobile Bravada RWD
DTC B3031: Controller In Learn Mode: Testing
2004 Oldsmobile Bravada RWDSECTION Testing
WARNING: This page is about a different car, the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
- If theft deterrent diagnostic system check has been performed, go to next step. If theft deterrent diagnostic system check has not been performed, go to THEFT DETERRENT DIAGNOSTIC SYSTEM CHECK .
- Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC), located below steering column. See Figure . Momentarily turn ignition switch to CRANK position, not letting engine start, release ignition switch to RUN position. Select scan tool Passlock(tm) module display DTCs function. If scan tool displays DTC B3031 as a current DTC, go to next step. If scan tool does not display DTC B3031 as a current DTC, go to step 4 .
- If scan tool does not display DTCs B2947, B2948, B2957 or B2958, go to next step. If scan tool displays DTCs B2947, B2948, B2957, B2958 or B3033, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
- Using scan tool, clear DTCs. Turn ignition switch to OFF position. Start vehicle. Select Passlock(tm) module DISPLAY DTC function. If DTC B3031 does not reset, system is okay at this time. If DTC B3031 resets, go to step 3 .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.