Diagnostic Test

TRANSFER CASE SELECTOR SWITCH VOLTAGE ABOVE 10 VOLTS
1. Ignition on, engine not running.
  NOTE: Repair any system undervoltage or overvoltage DTCs that are set in this module before proceeding.
2. With the scan tool, read the Transfer Case Switch voltage in the CCN.
  Is the voltage above 10 volts?
  
  Yes
  - Go to step 2
  No
  - Go to step 4
TRANSFER CASE SELECTOR SWITCH
1. Turn the ignition off to the lock position
2. Disconnect the Transfer Case Selector Switch harness connector.
3. Ignition on, engine not running.
4. With the scan tool, read the Transfer Case Selector Switch voltage in the CCN.
  Is the voltage equal to 0 volts?
  
  Yes
  - Replace the Transfer Case Selector Switch.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 3
(K77) TRANSFER CASE POSITION SENSOR INPUT CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Transfer Case Position Sensor Input Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the CCN C3 harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (K77) Transfer Case Position Sensor Input circuit.
  Is the voltage above 10 volts?
  
  Yes
  - Repair the (K77) Transfer Case Position Sensor Input circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the CCN in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.
5. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
6. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform AWD Control Module VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, All Wheel Drive (AWD) - Standard Procedure
  No
  - Test complete.