Durango 2WD V8-5.7L Hybrid (2009)
Compressor Clutch Coil: Testing and Inspection
A/C COMPRESSOR CLUTCH COIL
The clutch coil electrical circuit for the A/C compressor on gasoline only models are controlled by the powertrain control module (PCM) through the
A/C compressor clutch relay, which is located in the power distribution center (PDC) in the engine compartment. Begin testing of a suspected
compressor clutch coil problem by performing the preliminary checks.
PRELIMINARY CHECKS
1. If the compressor clutch will not engage, perform the A/C System Performance Test, which is found within the HVAC System Test See: Testing
and Inspection/Component Tests and General Diagnostics/HVAC System Test. If no diagnostic trouble codes (DTCs) are found in the A/C-heater
control or the powertrain control module (PCM), go to 2. If any DTCs are found, repair as required.
2. If the compressor clutch still will not engage, verify the refrigerant charge level See: Testing and Inspection/Component Tests and General
Diagnostics. If the refrigerant charge level is OK, go to TESTS. If the refrigerant charge level is not OK, adjust the refrigerant charge as required.
TESTS
1. Verify the battery state of charge See: Starting and Charging/Battery/Testing and Inspection/Battery.
2. Connect an ammeter (0 to 10 ampere scale selected) in series with the clutch field coil feed terminal using Back Probe Tool 6801. Connect a
voltmeter (0 to 20 volt scale selected) to measure voltage across the battery and the clutch coil.
3. With the A/C-heater control in the A/C mode and the blower at low speed, start the engine and allow it to run at a normal idle speed.
4. The compressor clutch should engage immediately and the clutch coil supply voltage should be within two volts of the battery voltage. If the coil
supply voltage is OK, go to 5. If the coil supply voltage is not within two volts of battery voltage, test the clutch coil feed circuit for excessive
voltage drop and repair as necessary.
5. The A/C clutch coil current draw should be 2.2 - 4.0 amps @ 12 volt ± 0.5 volt. Specifications apply for a work area temperature of 21° C (70° F).
If voltage is more than 12.5 volts, add electrical loads by turning on electrical accessories until voltage reads below 12.5 volts.
a. If the compressor clutch coil current reading is zero, the coil is open and must be replaced.
b. If the compressor clutch coil current reading is above specifications, the coil is shorted and must be replaced.
