Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Dakota. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE T-CASE POSITION SENSOR VOLTAGE
1. Ignition on, engine not running.
2. With the scan tool under Data Display, read the T-Case Position Sensor voltage.
  Is the voltage below 0.2 of a volt?
  
  Yes
  - Go To 2.
  No
  - Go To 8.
CHECK THE (T103) 5 VOLT SUPPLY CIRCUIT VOLTAGE

Fig 1: Checking 5 Volt Supply Circuit Voltage
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 of the (T103) 5 Volt Supply circuit.
  Is the voltage below 0.2 of a volt?
  
  Yes
  - Go To 3.
  No
  - Go To 5.
(T103) 5 VOLT SUPPLY CIRCUIT OPEN

Fig 2: Checking 5 Volt Supply Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position
2. Disconnect the FCM C1 harness connector.
3. Measure the resistance of the (T103) 5 Volt Supply circuit between the FCM C1 harness connector and the Shift Motor/Mode Sensor 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. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Go To 4.
(T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Fig 3: Checking 5 Volt Supply Circuit Shorted To Ground
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. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Replace the Front Control Module in accordance with the Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
SHIFT MOTOR/MODE SENSOR ASSEMBLY
1. With the scan tool under Data Display, read the T-Case Position Sensor voltage.
  Is the voltage above 4.5 volts?
  
  Yes
  - Replace the Shift Motor/Mode Sensor Assembly in accordance with the Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Go To 6.
(D201) MODE SENSOR A CIRCUIT SHORTED TO GROUND

Fig 4: Checking Mode Sensor A Circuit Shorted To Ground
Courtesy of CHRYSLER LLC
1. 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. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Go To 7.
(D201) MODE SENSOR A CIRCUIT SHORTED TO (G180) FCM SENSOR RETURN CIRCUIT

Fig 5: Checking Mode Sensor A Circuit Shorted To FCM Sensor Return Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (D201) Mode Sensor A circuit and the (G180) FCM Sensor Return circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (D201) Mode Sensor A circuit for a short to the (G180) FCM Sensor Return circuit.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Replace the Front Control Module in accordance with the Service Information.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
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.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to TRANSFER CASE VERIFICATION TEST .
  No
  - Test complete.