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 MANUALSVOLVO2004S80 L6-2.9L TURBO VIN 91 B6294TREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSBCM CODES (BRAKE CONTROL MODULE)BCM-0050INTERNAL FAULT
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294T
Internal Fault
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294TSECTION Internal Fault
Internal fault
Reading off diagnostic trouble codes (DTCs)
- Ignition on
- Read off diagnostic trouble codes (DTCs).
If any other codes than BCM-0050 are stored, these must be fault-traced first.
Were any diagnostic trouble codes (DTCs) other than BCM-0050 stored?
Yes - DONE
No - Erasing diagnostic trouble code (DTC)
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Erasing diagnostic trouble code (DTC)
- Ignition on.
Erase the diagnostic trouble codes (DTC).
Continue - Checking diagnostic trouble codes (DTCs)
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Checking diagnostic trouble codes (DTCs)
- Ignition off
- Check the brake control module (BCM) connector. Check for contact resistance and oxidation
- Wait a couple of seconds
- Ignition on
- Read off diagnostic trouble codes (DTCs).
Replace the brake control module (BCM) if diagnostic trouble code (DTC) BCM-0050 is still stored as a permanent fault.
Other information
- To replace the control module, see Brake Control Module (BCM), replacing Brake Control Module (BCM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals
Was diagnostic trouble code (DTC) BCM-0050 stored as a permanent fault?
Yes - FAULT FOUND
No - Fault-tracing information
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Fault-tracing information
The control module has previously registered a fault but the fault is no longer active. Check that the wiring is not too close to a source of interference such as a car-phone etc.
Yes - No Fault Found
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RENDER: 1.0x
NO RELATED
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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.