Control Module HVAC: Testing and Inspection

SELF TEST-BLOWER SPEED CONTROLLER (BSC)




Testing requires a Rotunda Digital Volt Ohm Meter 007-00001 or equivalent. Refer to the illustration for terminal pin locations. Use the following charts for self-test procedures.




Condition No. 1
No blower, ignition in RUN, engine warm, auto function, 32°C (90°F) setting.




Condition No. 2
High blower only; no low blower auto, function, blower thumbwheel turned to LOW position.




Condition No.3
Blower operates but does not vary with blower control switch.




Condition No.4
Cold Engine Lockout (CELO) inoperative: blower turns on immediately in AUTO, 32°C (90°F) setting, with cold engine.