Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 2000 >> Protege DX L4-1.6L DOHC >> Repair and Diagnosis >> Heating and Air Conditioning >> Evaporator Temperature Sensor / Switch >> Testing and Inspection
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

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.
- 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.
- If not as specified, replace the thermoswitch.
pro multis · About Operation CHARM