Heater Core: Testing and Inspection

INSPECT HEATER RADIATOR UNIT SUB-ASSEMBLY
a. Inspect servomotor operation.
1. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 5, then check that the arm turns to "HOT" side smoothly.
2. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the arm turns to "COOL" side smoothly.
If operations are not as specified, replace the servomotor.