Diagnostic Test

TRANSFER CASE POSITION SENSOR VOLTAGE BELOW 0.2 VOLTS
1. Ignition on, engine not running.
2. With the scan tool, read the Transfer Case Position Sensor voltage.
  Is the voltage below 0.2 volts?
  
  Yes
  - Go to step 2
  No
  - Go to step 7
(T103) 5-VOLT SUPPLY CIRCUIT VOLTAGE BELOW 0.2 VOLTS

Fig 1: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Shift Motor/Mode Sensor harness connector.
3. Ignition on, engine not running.
4. Measure the voltage between ground and the (T103) 5-volt Supply circuit.
  Is the voltage below 0.2 volts?
  
  Yes
  - Go to step 3
  No
  - Go to step 5
(T103) 5-VOLT SUPPLY CIRCUIT OPEN

Fig 2: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Front Control Module C1 harness connector.
3. Measure the resistance of the (T103) 5-volt Supply circuit between the Shift Motor/Mode Sensor harness connector and the Front Control Module C1 harness connector.
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T103) 5-volt Supply circuit for an open.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
(T103) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Fig 3: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (T103) 5-volt Supply circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (T103) 5-volt Supply circuit for a short to ground.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 5
TRANSFER CASE POSITION SENSOR VOLTAGE
1. With the scan tool, read the Transfer Case Position Sensor voltage.
  Is the voltage above 4.5 volts?
  
  Yes
  - Go to step 6
  No
  - Replace the Front Control Module in accordance with Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(D201) MODE SENSOR A CIRCUIT SHORTED TO GROUND

Fig 4: Checking Mode Sensor Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Measure the resistance between ground and the (D201) Mode Sensor A circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (D201) Mode Sensor A circuit for a short to ground.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Shift Motor/Mode Sensor Assembly.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK THE 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.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Test complete.