Protege LX L4-1.6L DOHC (2000)
Evaporator Temperature Sensor / Switch: Testing and Inspection
THERMOSWITCH INSPECTION
To Determine if the Switch is Functioning
1. Remove the glove compartment.
2. Start the engine.
3. Turn the A/C switch on.
4. Turn the fan switch on.
5. Connect the positive (+) and negative (-) probes of the voltmeter to terminal A and terminal B of the thermoswitch respectively. (The wiring
harness connector must be connected to the thermoswitch connector.)
6. Inspect the voltage as shown.
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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.
3. Remove the thermoswitch.
4. Connect the thermoswitch connector to the wiring harness connector.
5. Connect the negative battery cable.
6. Turn the ignition 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 (+) and negative (-) probes of the voltmeter to terminal A and terminal B of the thermoswitch respectively.
11. Inspect the voltage as shown.
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If not as specified, replace the thermoswitch.
