THERMOSWITCH INSPECTION

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To Determine if the Switch is Functioning

1.  Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)

2.  Start the engine.

3.  Turn the fan switch on.

4.  Turn the A/C switch on.

5.  Connect the positive (+) probe of the voltmeter to terminal B of the thermoswitch connector and the negative (-) probe to terminal C. (The wiring harness connector must be connected to the thermoswitch connector.)

6.  Measure the voltage as shown below.

Magnetic clutch	Voltage (V)
On	B+
Off	0

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7.  If not as specified, inspect on/off points of the thermoswitch.

To Inspect On/Off Points of the Thermoswitch

1.  Disconnect the negative battery cable.

2.  Remove the cooling unit. (See COOLING UNIT REMOVAL/INSTALLATION.)

3.  Remove the thermoswitch. (See COOLING UNIT DISASSEMBLY/ASSEMBLY.)

4.  Connect the negative battery cable.

5.  Connect the thermoswitch connector to the wiring harness connector.

6.  Turn the engine switch to ON position.

7.  Turn the A/C switch on.

8.  Turn the fan switch on.

9.  Immerse the sensor part of thermoswitch in a container of ice water.

10.  Connect the positive (+) probe of the voltmeter to terminal B of the thermoswitch connector and the negative (-) probe to terminal C.

11.  Measure the voltage as shown below.

Water temperature	Voltage (V)
3 °C {37 °F} or more	B+
1 °C {34 °F} or less	0

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12.  If not as specified, replace the thermoswitch. (See COOLING UNIT DISASSEMBLY/ASSEMBLY.)