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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Transmission >> Transfer Case >> (Torque Vectoring Module - Electrical Diagnostics) >> DTC Troubleshooting >> C260D-11 - Right Position Sensor Supply Voltage - Circuit Short To Ground >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Torque Vectoring Module (TVM) DTCs and record on the repair order.
    2. With the scan tool, erase TVM DTCs.
    3. Turn the ignition off for ten seconds.
    4. Turn the ignition on.
    5. With the scan tool, read TVM DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (T441) RIGHT TORQUE MOTOR POSITION SENSOR FEED CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the TVM 15 pin connector.
    3. Disconnect the Right Torque Motor connector.
    4. Measure the resistance of the (T441) Right Torque Motor Position Sensor Feed circuit between the TVM connector and the Right Torque Motor connector.

      Is the resistance above 2.0 ohms?

      Yes 

      • Repair the (T441) Right Torque Motor Position Sensor Feed circuit for an open or high resistance.
      • Perform the TVM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. CHECK THE (T443) RIGHT TORQUE MOTOR POSITION SENSOR RETURN CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (T447) Right Torque Motor Oil Temperature Sensor Return circuit between the TVM connector and the Right Torque Motor connector.

      Is the resistance above 2.0 ohms?

      Yes 

      • Repair the (T447) Right Torque Motor Oil Temperature Sensor Return circuit for an open or high resistance.
      • Perform the TVM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE (T442) RIGHT TORQUE MOTOR POSITION SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Check the continuity between ground and the (T442) Right Torque Motor Position Sensor Signal circuit.

      Is there continuity between ground and the (T442) Right Torque Motor Position Sensor Signal circuit?

      Yes 

      • Repair the (T442) Right Torque Motor Position Sensor Signal circuit for a short to ground.
      • Perform the TVM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  5
  5. CHECK THE RIGHT TORQUE MOTOR POSITION SENSOR FOR AN INTERNAL SHORT TO GROUND 
    1. Check the continuity between ground and the (T442) Right Torque Motor Position Sensor Signal circuit terminal of the Right Torque Motor Position Sensor.

      Is there continuity between ground and the (T442) Right Torque Motor Position Sensor Signal circuit terminal of the Right Torque Motor Position Sensor?

      Yes 

      • Replace the Right Torque Motor in accordance with the Service Information.
      • Perform the TVM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  6
  6. CHECK THE TVM FOR AN INTERNAL SHORT TO GROUND ON THE (T442) RIGHT TORQUE MOTOR POSITION SENSOR SIGNAL CIRCUIT 
    1. Check the continuity between ground and the (T442) Right Torque Motor Position Sensor Signal circuit terminal of the TVM.

      Is there continuity between ground and the (T442) Right Torque Motor Position Sensor Signal circuit terminal of the TVM?

      Yes 

      • Replace the TVM in accordance with the Service Information.
      • Perform the TVM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  7
  7. CHECK DTCS AFTER REPLACING THE RIGHT TORQUE MOTOR 
    1. Turn the ignition off.
    2. Replace the Right Torque Motor in accordance with the Service Information.
    3. Connect the TVM connector.
    4. Turn the ignition on.
    5. With the scan tool, erase TVM DTCs.
    6. Turn the ignition off for ten seconds.
    7. Turn the ignition on.
    8. With the scan tool, read TVM DTCs.

      Did the DTC return?

      Yes 

      • Go To  8

      No 

  8. CHECK RELATED WIRING AND HARNESS CONNECTIONS 
    1. Turn the ignition off.
    2. Check the related component and module power supply and ground circuits.
    3. Disconnect the TVM harness connector(s).
    4. Disconnect all related in-line harness connections (if equipped).
    5. Disconnect the related component harness connectors.
    6. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    7. Reconnect all harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    10. With the scan tool, erase DTCs.
    11. Using the recorded information along with the When Monitored and Set Conditions, operate the vehicle within the conditions that set the DTC.
    12. With the scan tool, read TVM DTCs.

      Did the DTC return?

      Yes 

      • Replace the TVM in accordance with the Service Information.
      • Perform the TVM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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