AC–45 AIR CONDITIONING SYSTEM – TROUBLESHOOTING INSPECTION PROCEDURE 1 Actuator check. Temperature Set Dial N06807 P 1. Warm up the engine. 2. Set to the actuator check mode (See page AC–22) 3. Turn the TSET dial and change it to step operation. operation. C Turn the TSET dial and check the operation of the air mix damper and the condition of the blower. OK Set Temp. Air Mix Damper Condition Below 20 0% (Fully closed) Cool air comes out 20 ~ 23 50% Over 23 100% (Fully opened) Warm air comes out NG OK Proceed to next circuit inspection shown on matrix chart (See page AC–26). 2 Check air mix damper control servo motor. HOT COOL N08784 N08785 P Remove air mix damper control servo motor assembly C Connect positive (+) lead to terminal 2 and negative (–) lead to terminal 1. OK The lever turns smoothly to Hot side. C Connect negative (–) lead to terminal 2 and positive (+) lead to terminal 1. OK The lever turns smoothly to Cool side. OK NG Replace air mix damper control servo motor assembly. 3 Check harness and connector between A/C amplifier and air mix damper control servo motor assembly (See page IN–30). OK NG Repair or replace harness or connector. Check and replace A/C amplifier.