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AC–46 AIR CONDITIONING SYSTEM – TROUBLESHOOTING Air Inlet Damper Control Servo Motor Circuit CIRCUIT DESCRIPTION The air inlet damper control servo motor is controlled by the A/C amplifier and signals the air inlet damper to move to the desired position. Condition | Trouble Area Air mix damper position sensor value does not change even if A/C amplifier signals the air mix damper control servo motor to operate. | • Air inlet damper position sensor • Harness or connector between air inlet damper control servo motor assembly and A/C amplifier • A/C amplifier WIRING DIAGRAM From HTR Fuse A/C Amplifier (M) 2 R-L 16 >> IG 1 RECIRC FRESH 5 G-R 13 >> IG 1 G-R 19 MREC A14 3 G 15 G 20 MFRS >> IG 1 A14 4 GR 14 GR 17 >> IG 1 A14 9 A14 GND Air Inlet Damper Control Servo Motor W-B A J1 A W-B Junction Connector NC8778