AC–28 AIR CONDITIONING SYSTEM – TROUBLESHOOTING CIRCUIT INSPECTION Blinking Light FACE Room Temperature Sensor Circuit CIRCUIT DESCRIPTION This sensor detects the temperature inside the cabin and sends the appropriate signals to the A/C amplifier. Diagnostic Sensor Check Detecting Condition | Trouble Area Open or short in room temperature sensor circuit. | • Room temperature sensor • Harness or connector between room temperature sensor and A/C amplifier • A/C amplifier WIRING DIAGRAM A/C Amplifier 5 V 5 Y-L A13 TR 2 Room Temp. Sensor 1 V-W 9 A13 SG N08775