Journey FWD V6-3.5L (2009)
Compressor Clutch: Testing and Inspection
Fixed Displacement A/C Compressor Clutch
CLUTCH - FIXED DISPLACEMENT A/C COMPRESSOR
The compressor clutch coil electrical circuit for the Denso 10SR15 and 10SR17 fixed displacement A/C compressors is controlled by the powertrain
control module (PCM) or the engine control module (ECM) (depending on engine application) through the totally integrated power module (TIPM)
(refer to the appropriate wiring information for complete HVAC wiring diagrams). Begin testing of a suspected compressor clutch coil problem by
performing the preliminary checks.
PRELIMINARY CHECKS
1. Using a scan tool, check for diagnostic trouble codes (DTCs) in the A/C-heater control, TIPM and PCM/ECM. If no diagnostic trouble codes
(DTCs) are found, go to 2. If any DTCs are found, repair as required.
2. If the A/C 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 COIL RESISTANCE TEST and/or COIL CURRENT DRAW TEST. If the refrigerant
charge level is not OK, adjust the refrigerant charge as required.
COIL RESISTANCE TEST
1. Disconnect and isolate the negative battery cable.
2. Disconnect the wire harness connector from the A/C clutch field coil connector.
3. Use an ohm meter and Back Probe Tool 6801 and measure the resistance of the clutch field coil at the field coil connector terminals.
4. Refer to the A/C Clutch Field Coil Specifications chart for the acceptable A/C clutch coil resistance. Specifications apply for a work area
temperature of 21° C (70° F).
a. If the A/C clutch coil reading is below specifications, the coil is shorted and must be replaced.
b. If the A/C clutch coil reading is above specifications, the coil is open and must be replaced.
COIL CURRENT DRAW TEST
1. Verify the battery state of charge See: Starting and Charging/Battery/Testing and Inspection/Component Tests and General Diagnostics/Battery.
2. Connect an ammeter (0 to 10 ampere scale selected) in series with the clutch 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 heater-A/C 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. Refer to the A/C Clutch Field Coil Specifications chart for the acceptable A/C clutch field coil current draw. 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.
A/C CLUTCH FIELD COIL SPECIFICATIONS
