Air conditioning system

1. 1
   Connect the positive (+) lead from the battery to terminal 3 and the negative (−) lead to the body ground.
2. 2
   Check that the magnet clutch energized.

If operation is not as specified, replace the magnet clutch assy.

If resistance is not as specified, replace the cooler compressor assy.

If continuity is not as specified, replace the magnet−clutch relay.

a. Inspect servomotor operation.

1. 1
   Connect the positive (+) lead from the battery to terminal 4 and negative (−) lead to terminal 5, then check that the arm turns to ”COLD” side smoothly.
2. 2
   Connect the positive (+) lead from the battery to terminal 5 and negative (−) lead to terminal 4, then check that the arm turns to ”HOT” side smoothly.

If operations are not as specified, replace the air mix servomotor.

Measure resistance between terminals at servomotor arm each position as shown in the chart.

If resistance is not as specified, replace the servomotor.

a. Inspect servomotor operation.

1. 1
   Connect the positive (+) lead from the battery to terminal 7 and the negative (−) lead to terminal 8.
2. 2
   Connect the negative (−) lead from the battery to each terminal as shown in the chart, and check that the shaft rotates at each position, as shown in the illustration.

   

If operation is not as specified, replace the servomoto

a. Inspect servomotor operation.

1. 1
   Connect the positive (+) lead from the battery to terminal 5 and negative (−) lead to terminal 1, then check that the arm turns to ”REC” side smoothly.
2. 2
   Connect the positive (+) lead from the battery to terminal 5 and negative (−) lead to terminal 2, then check that the arm turns to ”FRS” side smoothly.

If operations are not as specified, replace the mode damper servomotor.

1. 1
   Remove cooler thermistor No.1.
2. 2
   Check resistance between terminals 1 and 2 of cooler thermistor No.1 at each temperature, as shown in the chart.

HINT: As the temperature increases, the resistance decreases (see the chart below).

a. Connect the positive (+) lead from the battery to terminal 2 and negative (−) to terminal 1, then check that the motor operation smoothly.

If operation is not as specified, replace the blower motor.

a. Measure resistance between terminals, as shown in the chart below.

If resistance is not as specified, replace the blower resistor.

If continuity is not as specified, replace the heater blower motor relay