Inspection

1. INSPECT NO. 1 COOLER THERMISTOR

(a) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

1 - 2

-10°C (14°F)

7.30 to S.10 kQ

1 - 2

-5°C (23°F)

5.65 to 6.S5 kQ

1 - 2

0°C (32°F)

4.40 to 5.35 kQ

1 - 2

5°C (41°F)

3.40 to 4.15 kQ

1 - 2

10°C (50°F)

2.70 to 3.25 kQ

1 - 2

15°C (5S°F)

2.14 to 2.58 kQ

1 - 2

20°C (68°F)

1.71 to 2.05 kQ

1 - 2

25°C (77°F)

1.38 to 1.64 kQ

1 - 2

30°C (86°F)

1.11 to 1.32 kQ

NOTICE:

• Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.

• When measuring the resistance, the temperature of the sensor and the cooler thermistor must be the same.

HINT:

As the temperature increases, the resistance decreases (see the graph).

If the operation is not as specified, replace the cooler thermistor.

1

H

2

1

2. INSPECT PTC HEATER ASSEMBLY

(a) Measure the resistance. Standard resistance

Tester Connection

Specified Condition

1 - 2

Below 1 Q

2 - 3

Below 1 Q

1 - 3

Below 1 Q

If the resistance value is not as specified, replace the PTC heater assembly.

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