Diagnostic Test

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Start the engine and allow it to reach normal operating temperature.
2. Turn the Air Conditioning on.
  WARNING:
  When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
3. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
(Z901) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 1: Checking Ground Circuit For Open Or High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the A/C Compressor harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to 12 volts, check the (Z901) Ground circuit in the A/C Compressor harness connector.
  NOTE:
  The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Is the test light illuminated and bright?
  
  Yes
  - Go To 3
  No
  - Repair the (Z901) Ground circuit for an open circuit or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
(C27) A/C COMPRESSOR CONTROL CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking A/C Compressor Control Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (C27) A/C Compressor Control circuit in the A/C Compressor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (C27) A/C Compressor Control circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 4
(C27) A/C COMPRESSOR CONTROL CIRCUIT SHORTED TO GROUND

Fig 3: Checking A/C Compressor Control Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (C27) A/C Compressor Control circuit in the A/C Compressor harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the (C27) A/C Compressor Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 5
(C27) A/C COMPRESSOR CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 4: Checking A/C Compressor Control Circuit For Open Or High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (C27) A/C Compressor Control circuit between the A/C Compressor harness connector and the PCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (C27) A/C Compressor Control circuit for an open circuit or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
A/C COMPRESSOR

Fig 5: Checking A/C Compressor Control Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Connect the PCM C2 harness connector.
2. Turn the ignition on.
3. With the scan tool, actuate the A/C Compressor control to the ON position.
4. Using a 12-volt test light connected to ground, check the (C27) A/C Compressor Control circuit in the A/C Compressor harness connector.
  NOTE:
  The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
5. With the scan tool, actuate the A/C Compressor control to the OFF position.
6. Using a 12-volt test light connected to ground, check the (C27) A/C Compressor Control circuit in the A/C Compressor harness connector.
  NOTE:
  The test light should not be illuminated.
  
  Is the test light illuminated and bright with the actuation ON (100%) and not illuminated with the actuation OFF (0%)?
  
  Yes
  - Replace the A/C Compressor in accordance with the Service Information. Refer to COMPRESSOR, A/C, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 7
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Compressor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .