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HAC-82 < SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] INSUFFICIENT HEATING 8. CHECK ENGINE COOLANT SYSTEM Check engine coolant temperature sensor. Refer to EC-658, "Component Inspection" Is the inspection result normal? YES >> System OK. NO >> Repair or replace as necessary. Retest. 9. CHECK HEATER HOSES Check heater hoses for proper installation. YES >> System OK. NO >> 1. Back flush heater core. 2. Drain the water from the system. 3. Refill system with new engine coolant. Refer to CO-40, "Changing Engine Coolant" 4. GO TO 10 to retest. 10. CHECK HEATER HOSE TEMPERATURES 1. Start engine and warm it up to normal operating temperature. 2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be warm. Is the inspection result normal? YES >> System OK. NO >> Replace heater core. Refer to |