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 MANUALSOLDSMOBILE1998ACHIEVA 3.1 M, 4T40E/MN4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 6 (BODY CONTROL MODULES)DIAGNOSTIC TESTSDTC B2613: DIM POTENTIOMETER CIRCUIT HIGHTESTING
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4
DTC B2613: Dim Potentiometer Circuit High: Testing
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4SECTION Testing
WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- 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 under SYSTEM TESTS.
- Use scan tool to check for current DTCs. If DTC B2559 is also set as current, go to DTC B2559: THEATER DIMMING GROUND CIRCUIT (OPEN) . If DTC B2559 is not set as current, go to next step.
- Turn ignition off. Disconnect BCM connectors C2 and C3. Turn ignition on. Use DVOM to measure voltage between BCM connector C2 terminal B1 (White wire). See WIRING DIAGRAMS . See Figure . If reading is less than 2 volts, go to next step. If reading is greater than 2 volts, go to step 5 .
- Reconnect all disconnected connectors and components. Turn ignition on. Turn dimmer switch to DOME position. Using scan tool, clear DTCs. Recheck for DTCs. If DTC B2613 resets, go to step 6 . If DTC B2613 does not reset, go to step 7 .
- Repair short to voltage in White wire between BCM and courtesy lights. After repairs, go to step 8 .
- Replace BCM. See BODY CONTROL MODULE (BCM) under REMOVAL & INSTALLATION. Reprogram BCM. See NEW BCM SETUP under PROGRAMMING. Go to step 8 .
- System is operating properly at this time. See DIAGNOSTIC AIDS . After any repairs are made, go to next step.
- Turn ignition off. Reinstall all components and connectors. Turn ignition on. Using scan tool, clear DTCs. Check for DTCs. If any DTCs are current, perform BCM DIAGNOSTIC SYSTEM CHECK under SYSTEM TESTS. 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.