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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 ((Transmission Control Module (TCM) - Electrical Diagnostics - As68RC Automatic Transmission)) >> Diagnosis and Testing >> P0722-Output Speed Sensor Circuit No Signal >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(T14) OUTPUT SPEED SIGNAL CIRCUIT OPEN
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORT TO GROUND
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORT TO VOLTAGE
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORT TO ANOTHER CIRCUIT
(T72) 8 VOLT SUPPLY CIRCUIT OPEN
(T72) 8 VOLT SUPPLY CIRCUIT SHORT TO GROUND
(T72) 8 VOLT SUPPLY CIRCUIT SHORT TO ANOTHER CIRCUIT
OUTPUT SPEED SENSOR
DAMAGED TONE RING
TRANSMISSION CONTROL MODULE

Always perform the AS68RC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  Standard Procedure  . 



  1. CHECK IF THE DTC IS CURRENT 
    1. Using the scan tool, read TCM DTCs.
    2. Record the Environmental Data and any DTCs.
    3. Clear DTCs.
    4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
      NOTE:

      It may be necessary to road test the vehicle to duplicate the original set conditions.

    5. Read TCM DTCs.

      Did the DTC reset?

      Yes 

      • Go To  2.

      No 

      • Go To  11.
  2. CHECK THE (T72) 8 VOLT SUPPLY CIRCUIT 
    Fig 1: Checking 8 Volt Supply Circuit
    GC0111543Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the Output Speed Sensor harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage of the (T72) 8 Volt Supply circuit in the Output Speed Sensor harness connector.

      Is the voltage 8.0 volts (± 0.2 of a volt)?

      Yes 

      • Go To  3.

      No 

      • Go To  4.
  3. LOAD TEST THE (T72) 8 VOLT SUPPLY CIRCUIT 
    Fig 2: Load Testing 8 Volt Supply Circuit
    GC0111544Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the TCM C2 harness connector.
    3. Disconnect the Input Speed Sensor and the Output Speed Sensor harness connectors.
    4. Using a jumper wire, ground the (T72) 8 Volt Supply circuit in the Output Speed Sensor harness connector.
    5. Using a 12-volt test light connected to B (+), probe the (T72) 8 Volt Supply circuit on the appropriate terminal of TCM C2 harness connector.

      Does the test light illuminate brightly?

      Yes 

      • Go To  6.

      No 

      • Go To  4.
  4. CHECK THE (T72) 8 VOLT SUPPLY CIRCUIT FOR AN OPEN 
    Fig 3: Checking 8 Volt Supply Circuit For An Open
    GC0111545Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the TCM C2 harness connector.
    3. Measure the resistance of the (T72) 8 Volt Supply circuit between the TCM C2 harness connector and the Output Speed Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5.

      No 

      • Repair the (T72) 8 Volt Supply circuit for an open.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  5. CHECK THE (T72) 8 VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    Fig 4: Checking 8 Volt Supply Circuit For A Short To Ground
    GC0111546Courtesy of CHRYSLER LLC
    1. Measure the resistance between ground and the (T72) 8 Volt Supply Signal circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (T72) 8 Volt Supply circuit for a short to ground.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  6. CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    Fig 5: Checking Output Speed Sensor Signal Circuit For An Open
    GC0111547Courtesy of CHRYSLER LLC
    1. Disconnect the TCM C2 harness connector.
    2. Disconnect the Output Speed Sensor harness connector.
    3. Measure the resistance of the (T14) Output Speed Sensor Signal circuit between the TCM C2 harness connector and the Output Speed Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7.

      No 

      • Repair the (T14) Output Speed Sensor Signal circuit for an open.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  7. CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 6: Checking Output Speed Sensor Signal Circuit For A Short To Ground
    GC0111548Courtesy of CHRYSLER LLC
    1. Measure the resistance between ground and the (T14) Output Speed Sensor Signal circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (T14) Output Speed Sensor Signal circuit for a short to ground.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  8.
  8. CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT 
    Fig 7: Checking Output Speed Sensor Signal Circuit For A Short To Another Circuit
    GC0111549Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (T14) Output Speed Sensor Signal circuit and all other circuits in the TCM C2 harness connector.

      Is the resistance below 100k Ohms between the (T14) Output Speed Sensor Signal circuit and any other circuit(s) in the TCM C2 harness connector?

      Yes 

      • Repair the (T14) Output Speed Sensor Signal circuit for a short to another circuit(s).
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  9.
  9. CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 8: Checking Output Speed Sensor Signal Circuit For A Short To Voltage
    GC0111550Courtesy of CHRYSLER LLC
    1. Ignition on, engine not running.
    2. Measure the voltage of the (T14) Output Speed Sensor Signal circuit.

      Is there any voltage present?

      Yes 

      • Repair the (T14) Output Speed Sensor Signal circuit for a short to voltage.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  10.
  10. REPLACE THE OUTPUT SPEED SENSOR 
    1. Turn the ignition off to the lock position.
    2. Replace the Output Speed Sensor.
    3. Inspect the internal tone ring for damaged or missing teeth.
    4. Reconnect all connectors.
    5. Clear DTCs and road test the vehicle under the conditions in which the original DTC set.

      Did the Output Speed Sensor DTC reset?

      Yes 

      • Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

  11. CHECK THE WIRING AND CONNECTORS 
    1. The conditions necessary to set this DTC are not present at this time.
    2. Use the Freeze Frame Data to help duplicate the conditions in which the DTC originally set. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load
    3. Using the schematics as a guide, visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
    4. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
    5. Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
    6. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Test Complete.
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