Last Modified: 4-30-2014 6.6 C Doc ID: RM0000018N2001X agn Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 - ] Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM: 23; Pressure Switch Circuit; 2006 MY LX470 [05/2005 - ] 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 NO.
DETECTION ITEM TROUBLE AREA 23 Open in pressure sensor circuit Abnormal refrigerant pressure below 196 kPa (2.0 kg/cm 2 , 28 psi) over 3,140 kPa (32.0 kgf/cm 2 , 455 psi) Pressure switch Harness or connector between pressure switch and A/C amplifier Refrigerant pipe line A/C amplifier WIRING DIAGRAM INSPECTION PROCEDURE PROCEDURE 1. CHECK AIR CONDITIONING AMPLIFIER (a) Install the manifold gauge set. (b) Turn the ignition switch ON. (c) Check the voltage between terminals PSW (A49-8) and GND (A49-12) of the A/C amplifier connector when A/C gas pressure changes. OK: cardi