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 13 (BODY CONTROL MODULE)DIAGNOSTIC TESTSDTC B2600: DRL ERRORTESTING
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4
DTC B2600: DRL Error: Testing
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4SECTION Testing
WARNING: This page is about a different car, the 1998 Oldsmobile Cutlass and 1998 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- If BFC diagnostic system check was performed, go to next step. If BFC diagnostic system check was not performed, see procedures in BFC DIAGNOSTIC SYSTEM CHECK .
- If any other DRL DTCs exist, go to next step. If no other DRL DTCs exist, go to step 4).
- Repair all other DRL DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK . If system is operating properly, go to step 7). If system is not operating properly, go to next step.
- Remove DRL relay from underhood wiring harness junction block. Replace DRL relay with a known-good relay. Using scan tool, enable DRL relay. If automatic lighting control operates properly, go to next step. If automatic lighting control does not operate properly, go to step 6).
- Clear DTCs. Check for DTCs. If DTC B2600 exists, go to next step. If DTC B2600 does not exist, go to step 7).
- Replace BFC. See REMOVAL & INSTALLATION . Go to next step.
- Clear DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK .
- If BFC diagnostic system check was performed, go to next step. If BFC diagnostic system check was not performed, see procedures in BFC DIAGNOSTIC SYSTEM CHECK .
- If any other DRL DTCs exist, go to next step. If no other DRL DTCs exist, go to step 4).
- Repair all other DRL DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK . If system is operating properly, go to step 7). If system is not operating properly, go to next step.
- Remove DRL relay from underhood wiring harness junction block. Replace DRL relay with a known-good relay. Using scan tool, enable DRL relay. If automatic lighting control operates properly, go to next step. If automatic lighting control does not operate properly, go to step 6).
- Clear DTCs. Check for DTCs. If DTC B2600 exists, go to next step. If DTC B2600 does not exist, go to step 7).
- Replace BFC. See REMOVAL & INSTALLATION . Go to next step.
- Clear DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK .
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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.