Diagnostic Test

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Go to step 7
(T315) SHIFT MOTOR CONTROL A CIRCUIT VOLTAGE

Fig 1: Checking Shift Motor Control A Circuit Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the Transfer Case Motor harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (T315) Shift Motor Control A circuit.
  Is the voltage within 1 volt of battery voltage?
  
  Yes
  - Go to step 3
  No
  - Go to step 4
(T316) SHIFT MOTOR CONTROL B CIRCUIT VOLTAGE

Fig 2: Checking Shift Motor Control B Circuit Voltage
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (T316) Shift Motor Control B circuit.
  Is the voltage within 1 volt of battery voltage?
  
  Yes
  - Go to step 6
  No
  - Go to step 5
(T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN

Fig 3: Checking Shift Motor Control A Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the FDCM C1 harness connector.
3. Measure the resistance of the (T315) Shift Motor Control A circuit from the Transfer Case Motor harness connector to the Final Drive Control Module C1 harness connector.
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T315) Shift Motor Control A circuit for an open.
  - 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 .
(T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN

Fig 4: Checking Shift Motor Control B Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the FDCM C1 harness connector.
3. Measure the resistance of the (T316) Shift Motor Control B circuit from the Transfer Case Motor harness connector to the Final Drive Control Module C1 harness connector.
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T316) Shift Motor Control B circuit for an open.
  - 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 .
TRANSFER CASE MOTOR
1. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect all wiring and connectors that pertain to this circuit.
  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
  - 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 .
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.