Checking the technical condition
1. Determine the pressure in the high pressure line by measuring the voltage between terminals 1 and 2.
1. Mass
2. Voltage
3. Power supply (5V)
2. Check that the voltage is within the specified range. Voltage = 0.00878835 * Pressure + 0.5 [PSIA].
3. If the value is outside the standard range, replace the air conditioner pressure sensor.
Replacement
1. Disconnect the negative battery terminal.
2. Drain the refrigerant using a drain and charge machine.
3. Disconnect the connector (A) of the air conditioning pressure sensor.
4. Remove the sensor (B).
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Note: Be careful not to bend the liquid refrigerant and suction pipes.
5. Perform installation in reverse order.