SRT-4 L4-2.4L Turbo VIN S (2004)
Evaporator Temperature Sensor / Switch: Testing and Inspection
The work area and vehicle must be between 16° C (60° F) and 32° C (90° F) when testing the evaporator temperature sensor.
Evaporator Temperature Sensor Connector
1. Disconnect the wire harness connector from the evaporator temperature sensor located behind the glove box.
2. Start engine and set A/C to low blower motor speed, panel, full cool, and RECIRC.
3. Using a voltmeter, check for battery voltage between Pin 1 and 2. If no voltage is detected, there is no power to the evaporator temperature sensor.
Check wiring and fuses.
4. Using a voltmeter, check for battery voltage between Pin 1 and Pin 3. If no voltage is detected, there is no voltage from the powertrain control
module. If voltage is OK, connect a jumper wire between Pin 1 and Pin 3. The A/C compressor clutch should engage. If the clutch engages,
remove the jumper wire immediately and go to Step 5. If the compressor clutch does not engage, check the operation of the clutch and repair as
necessary.
5. If the A/C compressor clutch engages, connect the evaporator temperature sensor 3-way connector. The compressor clutch should engage or cycle
depending on evaporator temperature. If OK, go to Step 6. If not OK, replace the evaporator temperature sensor.
6. The engine running and the A/C set to:
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Blower motor on low speed
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Panel position
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Full cool
-
RECIRC.
Close all doors and windows. Place a thermometer in the center discharge vent.
7. If the clutch does not begin to cycle off between 2°C to 7°C (35°F to 45°F), verify that the evaporator temperature sensor probe is fully installed
and not loose in evaporator. If it is not properly installed, install probe and retest outlet temperature. If the evaporator probe is properly installed,
replace the evaporator temperature sensor.
