Refrigerant Pressure Sensor / Switch: Testing and Inspection

Refrigerant Pressure Sensor Circuit Check

Component Description
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent to ECM, and ECM controls cooling fan system.









Diagnosis Procedure

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VIAS Circuit Check

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Component Inspection

VIAS Control Solenoid Valve

With SDT
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform "VIAS SOL VALVE" in "Active test" mode.
4. Check air passage continuity and operation delay time under the following conditions.






Operation takes less than 1 second.

Without SDT
Check air passage continuity and operation delay time under the following conditions.






Operation takes less than 1 second.

Vacuum Tank
1. Disconnect vacuum hose connected to vacuum tank.






2. Connect a vacuum pump to the port (A) of vacuum tank.
3. Apply vacuum and make sure that vacuum exists at the port (B).