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.
1991 Oldsmobile Toronado V6-3800 3.8LFACTORY OEM SERVICE PROCEDURE
Part 1 of 3
BCM Schematic (1 Of 3):
1C6 = Heated Windshield Control
2A3 = Heated Windshield ON Input
2A11 = Heated Windshield Enable/Disable
2A7 = Ignition Off Input
2A6 = Washer Fluid Level
1C3 = DIS Clock
2B11 = DIS Data
1D16 = System ON/OFF
1C8 = Battery
1C9 = Battery
2B1 = Ground
2B2 = Ground
3D16 = Generator Field +
1C11 = Generator Enable
3C3 = Oil Pressure Sensor
2A1 = Sensor Ground
3C7 = Twilight Photocell
3D9 = In-Car Temp.
3D8 = Sunload Sensor
3D2 = A/C Low Temp.
3D4 = A/C High Temp.
3C6 = Outside Air Temp.
Factory Service Tools
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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.
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