B1423

DTC B1423 PRESSURE SWITCH CIRCUIT

CIRCUIT DESCRIPTION

Detection Item:

The pressure switch to detect the refrigerant pressure is located in the sight glass side of the pipe on the high-pressure side. This DTC is output when the refrigerant pressure is either significantly low (below 196 kPa (2.0 kgf/sq.cm, 28 psi) or significantly high (over 3,140 kPa (32.0 kgf/sq.cm, 455 psi). Then the pressure switch sends appropriate signals to the A/C amplifier. The pressure switch has built-in switches to detect high and low pressure and is turned off when either is determined to be defective. The A/C amplifier continuously monitors the pressure switch signal after the power switch is turned on. it stops compressor control and output the DTC when it detects the signal indicating that the switch is turned off.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE