AC–50 AIR CONDITIONING SYSTEM – TROUBLESHOOTING Blinking Light HI Air Outlet Damper Control Servo Motor Circuit CIRCUIT DESCRIPTION This circuit turns the servo motor and changes each mode damper position by the signals from the A/C amplifier. When the AUTO switch is on, the A/C amplifier changes the mode automatically between (FACE) (BI–LEVEL) an (FOOT) according to the temperature setting. Diagnostic Sensor Check Detecting Condition | Trouble Area Air outlet damper position sensor value does not change even if A/C amplifier signals the air outlet damper control servo motor. • Air outlet damper control servo motor • Air outlet damper position sensor • Harness or connector between A/C amplifier and air outlet damper control servo motor, air outlet damper position sensor • A/C amplifier WIRING DIAGRAM HTR Fuse R-L A14 IG Y-L 2 Y-L 7 IG 1 8 A12 MDEF Air Outlet Damper Control Servo Motor M W 1 W 1 IG 1 9 A12 MFAC W-B J1 W-B 9 A A A14 GND Junction Connector N08818