Component Inspection

INSPECTION




1. INSPECT COOLER COMPRESSOR ASSEMBLY (MANUAL AIR CONDITIONING)
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to the body ground.
b. Check that the magnetic clutch is engaged.
If operation is not as specified, replace the magnet clutch assembly.




2. INSPECT COOLING UNIT DAMPER SERVO SUB-ASSEMBLY (MANUAL AIR CONDITIONING)
a. Inspect servomotor operation.
1. 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.2.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.
If operations are not as specified, replace the servomotor.




3. INSPECT AIRMIX DAMPER SERVO SUB-ASSEMBLY (MANUAL AIR CONDITIONING)
a. Inspect servomotor operation.
1. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5 then check that the arm turns to "COOL" 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 "HOT" side smoothly.
If operations are not as specified, replace the servomotor.




4. INSPECT MODE DAMPER SERVO SUB-ASSEMBLY (MANUAL AIR CONDITIONING)
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 "DEF" 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 "FACE" side smoothly.
If operations are not as specified, replace the servomotor.







5. INSPECT BLOWER RESISTOR (MANUAL AIR CONDITIONING)
a. Measure resistance between terminals, as shown in the table.
If resistance is not as specified, replace the blower resistor.







6. INSPECT COOLER THERMISTOR NO.1 (MANUAL AIR CONDITIONING)
a. Check the resistance between terminal 1 and 2 of cooler thermistor No.1 as shown in the graph.
Standard:
5.3 to 5.4 kohm at 0 °C (32 °F)
2.6 to 2.7 kohm at 15 °C (59 °F)

If resistance value is not as specified, replace the sensor.




7. INSPECT BLOWER W/FAN MOTOR SUB-ASSEMBLY (MANUAL AIR CONDITIONING)
a. Connect the positive (+) lead from the battery to terminal 1 and negative (-) to terminal 2, then check that the motor operation smoothly.
If operation is not as specified, replace the blower motor.







8. INSPECT MAGNET-CLUTCH RELAY (MANUAL AIR CONDITIONING)
If continuity is not as specified, replace the heater relay.




9. INSPECT COOLING UNIT MOTOR SUB-ASSEMBLY W/FAN (MANUAL AIR CONDITIONING)
a. Connect the positive (+) lead from the battery to terminal 1 and negative (-) to terminal 2, then check that the motor operation smoothly.
If operation is not as specified, replace the blower motor.




10. INSPECT AIR OUTLET SERVOMOTOR
a. Inspect servomotor operation.
1. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the arm turns to "FACE" 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 "FOOT" side smoothly.
If operations are not as specified, replace the servomotor.




11. 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.




12. INSPECT BLOWER RESISTOR TRANSISTOR ASSEMBLY (MANUAL AIR CONDITIONING)
a. Measure resistance between terminals 3 and 4.
Standard: 2.0 to 2.4 kohm
If resistance is not as specified, replace the blower resistor transistor assembly.

b. Inspect blower resistor transistor assembly.
1. Connect the positive (-) lead to terminal 4 through a 12 V to 3.4 W test bulb and negative (-) lead to terminal 2.
2. Check the test bulb lights up when another positive (+) lead is connected to terminal 2 through a 12 V to 3.4 W test bulb.
If operation is not as specified, replace the blower resistor transistor assembly.







13. INSPECT COOLER (AMBIENT TEMP.SENSOR) THERMISTOR (MANUAL AIR CONDITIONING)
a. Check resistance between terminal 1 and 2 of cooler (ambient temp.sensor) thermistor as shown in the graph.
Standard:
1,615 to 1,785 ohm at 25 °C (77 °F)

HINT: As the temperature increase, the resistance decreases.

If resistance value is not as specified, replace the sensor.







14. INSPECT HEATER RELAY NO.1 (MANUAL AIR CONDITIONING)
If continuity is not as specified, replace the heater relay No.1.







15. INSPECT REAR COOLER RELAY (MANUAL AIR CONDITIONING)
If continuity is not as specified, replace the rear cooler relay.