Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

T-CASE POSITION SENSOR VOLTAGE BELOW 0.2 VOLTS
1. Ignition on, engine not running.
2. With the scan tool under TIPM, read the T-Case Position Sensor voltage.
  Is the voltage below 0.2 of a volt?
  
  Yes
  - Go To 2
  No
  - Go To 5
(T313) MODE SENSOR SIGNAL CIRCUIT VOLTAGE BELOW 4.9 VOLTS

Fig 1: Measuring Voltage Of Mode Sensor Signal Circuit & Sensor Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Transfer Case (4WD) Switch harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (T313) Mode Sensor Signal circuit and the (K91) Sensor Ground at the Transfer Case (4WD) Switch harness connector.
  Is the voltage below 4.9 volts?
  
  Yes
  - Go To 3
  No
  - Replace the Transfer Case (4WD) Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST.
(T313) MODE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

Fig 2: Measuring Resistance Between Ground & Mode Sensor Signal Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance between ground and the (T313) Mode Sensor Signal circuit at the Transfer Case (4WD) Switch harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T313) Mode Sensor Signal circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST.
  No
  - Go To 4
(T313) MODE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K91) SENSOR GROUND CIRCUIT

Fig 3: Measuring Resistance Between Mode Sensor Signal Circuit & Sensor Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (T313) Mode Sensor Signal circuit and the (K91) Sensor Ground circuit at the Transfer Case (4WD) Switch harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T313) Mode Sensor Signal circuit for a short to the (K91) Sensor Ground circuit.
  - Perform the BODY VERIFICATION TEST.
  No
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
  - Perform the BODY 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 BODY VERIFICATION TEST.
  No
  - Test complete.