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 MANUALSLEXUS2009ES 350 V6-3.5L (2GR-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGREFRIGERANT PRESSURE SENSOR / SWITCHTESTING AND INSPECTION
2009 Lexus ES 350 V6-3.5L (2GR-FE)
Refrigerant Pressure Sensor / Switch: Testing and Inspection
2009 Lexus ES 350 V6-3.5L (2GR-FE)SECTION Testing and Inspection
AIR CONDITIONING PRESSURE SENSOR:
ON-VEHICLE INSPECTION
1. INSPECT PRESSURE SENSOR
(a) Install the manifold gauge set Refrigerant.
(b) Connect the three 1.5 V dry cell batteries' positive (+) lead to terminal 3 and the negative (-) lead to terminal 1. Then connect the voltmeter's positive (+) lead to terminal 2 and the negative (-) lead to terminal 1. Measure the voltage.
OK:
The voltage changes according to refrigerant pressure, as shown in the graph.
If the voltage is not as specified, replace the pressure sensor.
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.