Diagnostic Test

DTC IS ACTIVE
1. Start the engine and allow it to idle.
2. Move the Transfer Case Selector Switch to each position several times.
3. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Go to step 7
(T317) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT SHORTED TO GROUND

Fig 1: Checking Transfer Case Motor Lock Signal Circuit Shorted To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the Transfer Case Motor harness connector.
3. Disconnect the FDCM C1 harness connector.
4. Measure the resistance between ground and the (T317) Transfer Case Motor Lock Signal circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (T317) Transfer Case Motor Lock Signal circuit for a short to ground.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to step 3
ACTUATE T-CASE MOTOR SOLENOID LOCK

Fig 2: Checking Actuate T-Case Motor Solenoid Lock
Courtesy of CHRYSLER LLC
1. Reconnect the FDCM C1 harness connector.
2. Ignition on, engine not running.
3. Using the scan tool, erase DTCs.
4. With the scan tool, actuate the T-Case Motor Solenoid Lock in the FDCM.
5. Using a 12-volt test light connected to 12-volts, check the (T317) Transfer Case Motor Lock Signal circuit with the circuit actuated.
  NOTE: Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly with the circuit actuated?
  
  Yes
  - Go to step 5
  No
  - Go to step 4
(T317) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 3: Checking Transfer Case Motor Lock Signal Circuit Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the Final Drive Control Module C1 connector.
3. Measure the resistance of the (T317) Transfer Case Motor Lock Signal circuit between the Final Drive Control Module C1 harness connector and the Transfer Case Motor harness connector.
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T317) Transfer Case Motor Lock Signal circuit for an open circuit or high resistance.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Replace the Final Drive Control Module in accordance with the Service Information.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
(T301) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT VOLTAGE

Fig 4: Checking Switched Battery Solenoid Supply Circuit Voltage
Courtesy of CHRYSLER LLC
1. Ignition on, engine not running.
2. Using a 12-volt test light, jumper the (T301) Switched Battery Solenoid Supply circuit to the (T317) Transfer Case Motor Lock Signal in the Transfer Case Motor harness connector.
  NOTE: As a failsafe precaution when either the Front Differential Solenoid, Rear Differential Solenoid, or the Transfer Case Motor harness connectors are disconnected, the DTCs must be cleared in the FDCM. Failure to follow this will result in the FDCM detecting this condition and turning OFF the Switched Battery Solenoid Supply circuit.
3. Using the scan tool, erase DTCs.
4. With the scan tool, actuate the T-Case Motor Solenoid Lock in the Final Drive Control Module.
  NOTE: Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Transfer Case Motor in accordance with the Service Information.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to step 6
(T301) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Fig 5: Checking Switched Battery Solenoid Supply Circuit Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the FDCM C1 connector.
3. Measure the resistance of the (T301) Switched Battery Solenoid Supply circuit between the FDCM C1 harness connector and the Transfer Case Motor harness connector.
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T301) Switched Battery Solenoid Supply circuit for an open circuit or high resistance.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Replace the Final Drive Control Module (FDCM) in accordance with the Service Information.
  - Perform TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the SYSTEM WIRING DIAGRAMS 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 TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Test complete.