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Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> DTC 23 Pressure Switch Circuit >> Description

DTC 23 Pressure Switch Circuit: Description

The pressure switch sends the appropriate signals to the A/C amplifier when the A/C refrigerant pressure drops too low or rises too high. When the A/C amplifier receives these signals, it outputs signals via the A/ C amplifier to switch OFF the compressor relay and turns the magnetic clutch OFF.

DTC TROUBLE DETECTION CONDITION

DTC No. Detection Item Trouble Area
23
  • Open in pressure sensor circuit
  • Abnormal refrigerant pressure below 196 kPa (2.0 kg/cm2 , 28 psi) over 3,140 kPa (32.0 kgf/cm2 , 455 psi)
  • Pressure switch
  • Harness or connector between pressure switch and A/C amplifier
  • Refrigerant pipe line
  • A/C amplifier
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