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RHA849E COMPONENT DESCRIPTION NCHA0141 Air Mix Door Motor NCHA0141S01 The air mix door motor is attached to the bottom of the heater unit. RHA643F 4 5 Air mix door operation Direction of lever movement (+) (−) COLD , HOT Clockwise (Toward passenger compart- ment) — — STOP STOP (−) (+) HOT , COLD Counterclockwise (Toward engine compartment) RHA139H CONTROL SYSTEM INPUT COMPONENTS NCHA0144 Potentio Temperature Control (PTC) NCHA0144S01 The PTC is built into the control unit. It has a variable resistance NCHA0144S0101 After disconnecting PTC harness connector, measure resistance SHA938E RHA644F PBR NCHA0144S02 Measure resistance between terminals 1 and 2 at vehicle harness GI MA EM LC EC FE CL MT AT AX SU BR ST RS BT SC EL IDX TROUBLE DIAGNOSES MANUAL Air Mix Door (Cont’d) HA-163 |