Diagnostic Test

DTC IS ACTIVE
1. Ignition on, engine off.
2. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to 2
  No
  - Go to 9
RELEARN KISS POINT
1. Ignition on, engine running.
2. Place the transmission in neutral and apply the brakes firmly.
3. With the scan tool, run the FDCM non-volatile reset command.
4. Place the Transmission in park.
5. Turn the ignition off to the lock position
6. Wait for 10 seconds and turn ignition switch back to Ignition on, engine not running.
7. With the scan tool, erase DTCs.
8. Test drive the vehicle.
9. With the scan tool, read DTCs.
  Is the DTC status Active?
  
  Yes
  - Go to 3
  No
  - Go to 9
(T315) STEP MOTOR CONTROL B CIRCUIT OPEN

Fig 1: Checking Step Motor Control B Circuit For Open
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 of the (T315) Step Motor Control A circuit from the Transfer Case Motor harness connector to the FDCM C2 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (T315) Step Motor Control A circuit.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to 4
(T316) STEP MOTOR CONTROL C CIRCUIT OPEN

Fig 2: Checking Step Motor Control C Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (T316) Step Motor Control B circuit from the Transfer Case Motor harness connector to the FDCM C2 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (T316) Step Motor Control B circuit.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to 5
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT OPEN

Fig 3: Checking Drivetrain Five Volt Supply Circuit For Open
Courtesy of CHRYSLER LLC
1. Disconnect the Transfer Case Encoder harness connector.
2. Disconnect the FDCM C2 harness connector.
3. Measure the resistance of the (K504) Drivetrain 5 Volt Supply circuit between the Transfer Case Encoder harness connector and the FDCM C2 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (K504) Drivetrain 5 Volt Supply circuit.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to 6.
(T313) MODE SENSOR SIGNAL CIRCUIT HIGH RESISTANCE

Fig 4: Checking Mode Sensor Signal Circuit For High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (T313) Mode Sensor Signal circuit between the Transfer Case Encoder harness connector and the FDCM C2 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the high resistance in the (T313) Mode Sensor Signal circuit.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Go to 7
(K594) DRIVETRAIN SENSOR RETURN CIRCUIT HIGH RESISTANCE

Fig 5: Checking Drivetrain Sensor Return Circuit For High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K594) Drivetrain Sensor Return circuit between the Transfer Case Encoder harness connector and the FDCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to 8
  No
  - Repair the high resistance in the (K594) Drivetrain Sensor Return circuit.
  - Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
TRANSFER CASE ENCODER
1. Turn the ignition off to the lock position
2. Connect the Transfer Case Encoder harness connector.
3. Connect the FDCM C1 harness connector.
4. Connect the FDCM C2 harness connector.
5. With the scan tool monitor the Transfer Case Encoder voltage while test driving the vehicle and performing 90° angle parking lot maneuvers in both forward and reverse.
6. Transfer Case Encoder voltage should be:
- 2WD - less than 1.5 volts
- 4WD - between 1.5 volts and 4.0 volts
INTERMITTENT WIRING HARNESS 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 harness and connectors.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
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, Final Drive Control (FDCM) - Standard Procedure .
  No
  - Test complete.