Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

VERIFY THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. Push the accelerator pedal and hold for 10 seconds.
3. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 8
TORQUE COUPLING CONTROL (ECC) SOLENOID OPERATION
1. Turn the ignition off.
2. Disconnect the Torque Coupling Control (ECC) Solenoid harness connector.
3. Ignition on, engine not running.
4. Using a 12-volt test light, jump across from the (T78) Solenoid Supply Voltage circuit and the (T312) Rear Differential Solenoid Control circuit in the Torque Coupling Control (ECC) Solenoid harness connector.
5. With the scan tool, actuate the Torque Coupling Control (ECC) Solenoid.
  Does the test light illuminate brightly and flash on and off?
  
  Yes
  - Go To 7
  No
  - Go To 3
(T78) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT OPEN

Fig 1: Checking Switched Battery Solenoid Supply Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the AWD Control Module harness connector.
3. Measure the resistance of the (T78) Solenoid Supply Voltage circuit between the ECC Solenoid harness connector and the AWD Control Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (T78) Solenoid Supply Voltage circuit.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
(T78) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT SHORTED TO GROUND

Fig 2: Checking Switched Battery Solenoid Supply Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (T78) Solenoid Supply Voltage circuit at the ECC Solenoid harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short to ground in the (T78) Solenoid Supply Voltage circuit.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
  No
  - Go To 5
(T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT OPEN

Fig 3: Checking Rear Differential Solenoid Control Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (T312) Rear Differential Solenoid Control circuit between the ECC Solenoid harness connector and the AWD Control Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the open in the (T312) Rear Differential Solenoid Control circuit.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
AWD CONTROL MODULE
NOTE:
Before continuing, check the AWD Control Module harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
  No
  - Replace the All Wheel Drive (AWD) Control Module in accordance with Service Information.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
ELECTRONICALLY CONTROLLED CLUTCH (ECC)
NOTE:
Before continuing, check the ECC Solenoid jumper harness connector terminals for corrosion, damage, or terminals push out, repair/replace as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
  No
  - Replace Torque Coupling Control (ECC) Solenoid in accordance with service information.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
4. Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the AWD CONTROL MODULE VERIFICATION TEST. Refer to AWD CONTROL MODULE VERIFICATION TEST .
  No
  - Test Complete.