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BLOWER MOTOR CONTROL SYSTEM HAC-153 < FUNCTION DIAGNOSIS > [WITH 7 INCH DISPLAY] C D E F G H J K L M A B HAC N O P Starting Air Flow Control • When starting the automatic control of air flow, the system gradually increases the duty ratio of the blower motor drive signal to prevent too much air from blowing. • The time period from when the air flow changes from LO to HI is approximately 8 seconds. C auto amp. and engine coolant temperature [approximately 56 ° C (133 ° F) or less] during the automatic air flow control. • Do not perform the starting air flow control when the air discharge outlet is set to DEF. Starting Fan Speed Control Start up from COLD SOAK Condition (Automatic mode) ° C (133 ° F), the blower does not operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the ° C (133 ° F), and then the blower speed increases to the objective speed. Start up from usual or HOT SOAK Condition (Automatic mode) |