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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> DTCS B234B To P0693 (TIPM) >> P0647-A/C Clutch Control Circuit 2 High - NGC >> Diagnostic Test

Diagnostic Test

  1. ACTIVE DTC 
    1. Start the engine.
    2. Allow the engine to reach normal operating temperature.
    3. Turn the A/C on.
    4. With a scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go to step  2

      No 

  2. (C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: Checking A/C Clutch Control Output Circuit For Short To Voltage
    GC0097907Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C2 TIPM harness connector.
    3. Disconnect the A/C Compressor Clutch harness connector.
    4. Ignition on, engine not running.
    5. Measure the voltage on the (C3) A/C Clutch Control Output circuit at the A/C Compressor Clutch harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  3
  3. A/C CLUTCH GROUND CIRCUIT OPEN 
    Fig 2: Checking A/C Clutch Ground Circuit For Open
    GC0097908Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Connect the C2 TIPM harness connectors.
    3. Using a 12-volt test light connected to 12-volts, probe the (Z153) A/C Clutch ground circuit at the A/C Compressor Clutch harness connector.

      Does the test light illuminate brightly?

      Yes 

      • Go to step  4

      No 

  4. A/C COMPRESSOR CLUTCH 
    Fig 3: Checking A/C Clutch Control Output Circuit At A/C Compressor Clutch Harness Connector
    GC0097904Courtesy of CHRYSLER LLC
    1. Ignition on, engine not running.
    2. With a 12-volt test light connected to ground, probe the (C3) A/C Clutch Control Output circuit at the A/C Compressor Clutch harness connector.
    3. Using the scan tool under the TIPM Actuators, actuate the A/C Clutch.

      Does the test light illuminate brightly and flash on and off?

      Yes 

      No