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Home >> Subaru >> 2012 >> Legacy F4-2.5L DOHC Turbo >> Repair and Diagnosis >> Heating and Air Conditioning >> Evaporator Temperature Sensor / Switch >> Testing and Inspection
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Evaporator Temperature Sensor / Switch: Testing and Inspection

EVAPORATOR SENSOR

Preparation tool:
Subaru Select Monitor III KIT
Circuit tester
Thermometer

1. Prepare the vehicle.

NOTE: Check that the ambient temperature is 25 - 40 °C (77 - 104 °F) and that the humidity is 30% - 80%.

- Place the vehicle in the workshop or in the shade and windless condition.
- Open all windows.

2. Set the vehicle to the following conditions.






3. Using the Subaru Select Monitor, check the evaporator sensor.
1. Prepare the Subaru Select Monitor kit.
2. Run the "PC application for Subaru Select Monitor".
3. On <
> display, select {Each System Check}.
4. On <> display, select {Air Condition System}.
5. On <> display, select {Current Data Display & Save}.
6. Select {Evaporator Temperature} with UP/DOWN key and set with the [OK] key.
7. Idle the engine for 15 minutes, and then compare the outlet opening temperature with {Evaporator Temperature Target}.

NOTE: For outlet opening temperature, measure the average temperature of center grille assembly and side grille assembly.

8. Is the difference between outlet opening temperature and {Evaporator Temperature Target} by 3 °C (5.4 °F) or more?

- Yes --> Go to step 4).
- No --> Evaporator sensor is normal.

4. Perform the inspection of evaporator sensor unit.
1. Disconnect the evaporator sensor connector.
2. Is the resistance between terminals of evaporator sensor within standard value?






- Yes --> Evaporator sensor is normal.
- No --> Replace the evaporator sensor.
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