B1423

DTC B1423/23 PRESSURE SWITCH CIRCUIT

CIRCUIT DESCRIPTION

Detection Item:

This DTC is output when refrigerant pressure is extremely low (0.19 MPa (2.0 kgf/sq.cm, 28 psi) or less) or extremely high (3.14 MPa (32.0 kgf/sq.cm, 455 psi) or more).The pressure sensor, which is installed on the pipe of the high pressure side to detect refrigerant pressure, outputs the refrigerant pressure signal to the air conditioning amplifier. The air conditioning amplifier converts the signals into pressure according to the sensor characteristics to control the compressor.

HINT: Be sure to check the refrigerant volume first when this DTC is output because this DTC can also be output if there is no refrigerant in the cycle.

Wiring Diagram:

Step 1-2:

Step 3-4:

Step 5:

INSPECTION PROCEDURE