Last Modified: 4-30-2014 6.6 C Doc ID: RM0000018N3001X agn Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 - ] Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM: 19; Rear Room Temperature Sensor Circuit; 2006 MY LX470 [05/2005 - ] DTC 19 Rear Room Temperature Sensor Circuit DESCRIPTION This sensor detects the temperature inside the cabin (rear side) and sends the appropriate signals to the rear A/C amplifier. DTC NO.
DETECTION ITEM TROUBLE AREA 19 Open or short in rear room temperature sensor circuit Rear room temperature sensor Harness or connector between rear room temperature sensor and rear A/C amplifier Rear A/C amplifier WIRING DIAGRAM INSPECTION PROCEDURE PROCEDURE CHECK AIR CONDITIONING AMPLIFIER 1. (a) Remove the rear A/C amplifier with the connectors still connected. (b) Turn the ignition switch ON. (c) Measure the voltage between terminals TR (A35-7) and SGND (A35-12) of the rear A/C amplifier connector at each temperature. Standard voltage: 1.8 to 2.2 V at 25°C (77°F) 1.2 to 1.6 V at 40°C (104°F) HINT: As the temperature increases, the voltage decreases.
However, if DTC 19 is displayed, check and replace the A/C amplifier. cardi