Simple Inspection Of The A/C Pressure Sensor

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Assemble a gauge manifold on the high pressure service valve.
Disconnect the A/C pressure sensor connector and connect the special tool test harness (MB991658) as shown.
Start the engine and then turn ON the air conditioning switch.

Fig 1: Identifying A/C Pressure Sensor Connector Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Inspecting A/C Pressure Sensor
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
At this time, check to see that the voltage of the A/C pressure sensor connector terminal No. 2 reflects the specifications of the figure.
NOTE:
- The allowance shall be defined as ±5%.
- The A/C pressure sensor is incorporated in the discharge flexible hose, and the high-pressure service valve is incorporated in liquid pipe B. Therefore, the pressure at the A/C pressure sensor is 0.1 to 0.3 MPa (15 to 44 psi) higher than that at the gauge manifold.
Fig 3: A/C Pressure Sensor Output Voltage Vs Refrigerant Pressure Graph
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.