Air Mix Control Servo Motor INSPECTION OF AIR MIX CONTROL SERVO MOTOR (Operation) (a) Connect the positive (+) lead from the battery to terminal 10 and the negative (—) lead to terminal 11. (b) Check that the lever moves smoothly from WARM to COOL. (c) Connect the positive (+) lead from the battery to terminal 11 and the negative (—) lead to terminal 10. (d) Check that the lever moves smoothly from COOL to WARM. (Resistance) While operating the servo motor from either points (a) or (b), measure the resistance values of terminals 5 and 6: Position Resistance (Ω) COOL 1,900 ± 100 WARM 200 ± 50 The resistance values from COOL to WARM will successively decrease. If operation or resistance is not as specified, replace the servo motor.