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 MANUALSCADILLAC1985FLEETWOOD BASE, 4D LIMOUSINEREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISDFI BCM TESTS W/CODES - FWDBCM TROUBLE CODE MENU
1985 Cadillac Fleetwood Base, 4D Limousine
BCM Trouble Code Menu
1985 Cadillac Fleetwood Base, 4D LimousineSECTION BCM Trouble Code Menu
FWD DEVILLE & FLEETWOOD BCM TROUBLE CODES
| Code | Circuit Affected | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F10 | Outside temp. sensor circuit. | ||||||||||||||
| F11 (1) | A/C High side temp. sensor circuit. | ||||||||||||||
| F12 (2) | A/C Low side temp. sensor circuit. | ||||||||||||||
| F13 | In-car temp. sensor circuit. | ||||||||||||||
| F30 (4) | CCP-to-BCM data circuit. | ||||||||||||||
| F31 | FDC-to-BCM data circuit. | ||||||||||||||
| F32 (3) | ECM-to-BCM data circuit. | ||||||||||||||
| F40 | Air mix door problem. | ||||||||||||||
| F41 (5) | Cooling fans problem. | ||||||||||||||
| F46 (7) | Low refrigerant warning. | ||||||||||||||
| F47 (6)(7) | Low refrigerant condition. | ||||||||||||||
| F48 (6)(7) | Low refrigerant pressure. | ||||||||||||||
| F49 | High temp. clutch disengage. | ||||||||||||||
| F51 | BCM PROM error. | ||||||||||||||
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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.