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 MANUALSBUICK1998REGAL 25TH ANNIVERSARY EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEBODY, CAB CONTROL SYSTEMSBODY CONTROL MODULEDIAGNOSTIC TESTSDTC B2735: PASS-KEY(R) II PROGRAMMING MODE ACTIVETESTING
1998 Buick Regal 25th Anniversary Edition
DTC B2735: Pass-Key(R) II Programming Mode Active: Testing
1998 Buick Regal 25th Anniversary EditionSECTION Testing
- If BCM diagnostic system check was performed, go to next step. If BCM diagnostic system check was not performed, go to BCM DIAGNOSTIC SYSTEM CHECK .
- Turn ignition switch to RUN position. Using scan tool, clear DTCs. Check for DTCs. If DTC B2735 is set, go to next step. If DTC B2735 is not set, system is operating properly.
- Using scan tool, check for PASS-Key(R) II DTCs B2722 or B2723. If either of these DTCs exist, go to appropriate DTC test. If these DTCs do not exist, go to next step.
- Replace BCM. See REMOVAL & INSTALLATION . Reprogram BCM. See BCM PROGRAMMING . Go to next step.
- Turn ignition switch to LOCK position. Reinstall all components and connectors. Turn ignition switch to RUN position. Using scan tool, clear DTCs. Check for DTCs. If any DTCs are current, perform BCM DIAGNOSTIC SYSTEM CHECK . If no DTCs are current, system is operating properly.
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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.