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.
Pressures, Checking, Vehicles With RESTRICTOR And Reservoir, Internally Regulated A/C Compressor: Notes
Connect the A/C service station. Refer to A/C SERVICE STATION, CONNECTING .
Observe the test requirements. Refer to PRESSURES, CHECKING .
-- With the ignition switched off, check the pressures in the refrigerant circuit (using the A/C service station). Refer to Refer to REFRIGERANT CIRCUIT, CHECKING PRESSURE WITH SERVICE STATION .
The pressures with the ignition turned off meet the specifications.
-- Start the engine.
-- Bring the engine speed up to 2000 RPM.
-- Observe the pressure gauge of the A/C service station.
The switching pressures for the refrigerant circuit switches are vehicle-specific.
The connection with the valve for low-pressure switch or at the evaporator is only to be used on vehicles with no service connection on the low-pressure side and with an inaccessible connection on the A/C compressor or reservoir (measuring exactness). Only applies to specific vehicles. Refer to Refrigerant Circuit (vehicle-specific Repair Information).
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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.