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HEATER PUMP CONTROL SYSTEM HAC-33 < FUNCTION DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P HEATER PUMP CONTROL SYSTEM Description INFOID:0000000004215309 The heater pump sends engine coolant to the heater core assembly while the engine is stopped to prevent heater effectiveness from becoming low. Directed by the ECM, the IPDM E/R operates the heater pump. SYSTEM DESCRIPTION Heater Pump Circuit JSIIA0314GB |