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.
1987 Oldsmobile ToronadoFACTORY OEM SERVICE PROCEDURE
A/C High Side Test
A/C High Side BD 27 Test is made with engine running at 2000 RPM.
NOTE:
Run High Side Test only if Code B449 is set. If pressures and temperatures are both high, check for sources of excess head pressure.
If BD 27 exceeds 199°F (93°C) but pressure remains below 380 psi, sensor is out of specification.
NOTE:
Compressor will disengage and Code B449 will set if temperature sensor value exceeds 199°F.
Factory Service Tools
Use the Manual With the Right Hardware
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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.