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.

When Monitored:

Output speed is greater than 807 rpm and the PRNDL is not in Park or Neutral.
Input Speed sensor is reporting as failed or CAN wheel speed not available.

Set Condition:

If Output speed is greater than 3227 rpm and the TCM detects a decrease of Output speed greater than 141 rpm in 5 ms.
If Output speed is greater than 2017 rpm and the TCM detects a decrease of Output speed greater than 202 rpm in 5 ms.
If Output speed is greater than 807 rpm and the TCM detects a decrease of Output speed greater than 303 rpm in 5 ms.

Possible Causes
(T14) OUTPUT SPEED SIGNAL CIRCUIT OPEN
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORTED TO GROUND
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORTED TO VOLTAGE
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORTED TO ANOTHER CIRCUIT
(T72) SPEED SENSOR GROUND CIRCUIT OPEN
(T72) SPEED SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE
(T72) SPEED SENSOR GROUND CIRCUIT SHORTED TO ANOTHER CIRCUIT
OUTPUT SPEED SENSOR
TRANSMISSION CONTROL MODULE (TCM)

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

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 10.
CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN

Fig 1: Checking Output Speed Sensor Signal Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C2 harness connector.
3. Disconnect the Output Speed Sensor harness connector.
4. 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 3.
  No
  - Repair the (T14) Output Speed Sensor Signal circuit for an open.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK THE (T72) SENSOR GROUND CIRCUIT FOR AN OPEN

Fig 2: Checking 8 Volt Supply Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (T72) Sensor Ground circuit between the TCM C2 harness connector and the Output Speed Sensor harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the (T72) Sensor Ground circuit for an open.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 3: Checking Output Speed Sensor Signal Circuit For A Short To Ground
Courtesy 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 5.
CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 4: Checking Output Speed Sensor Signal Circuit For A Short To Another Circuit
Courtesy 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 6.
CHECK THE (T72) SENSOR GROUND CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 5: Checking Sensor Ground Circuit For A Short To Another Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (T72) Sensor Ground circuit and all other circuits in the TCM C2 harness connector.
  Is the resistance below 100k Ohms?
  
  Yes
  - Repair the (T72) Sensor Ground circuit for a short to another circuit(s).
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Go To 7.
CHECK THE (T14) OUTPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 6: Checking Output Speed Sensor Signal Circuit For A Short To Voltage
Courtesy of CHRYSLER LLC
1. Ignition on, engine not running.
2. Measure the voltage of the (T14) Output Speed Sensor Signal circuit in the Output Speed Sensor harness connector.
  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 8.
CHECK THE (T72) SENSOR GROUND CIRCUIT FOR A SHORT TO VOLTAGE

Fig 7: Checking Sensor Ground Circuit For A Short To Voltage
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (T72) Sensor Ground circuit in the Output Speed Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (T72) Sensor Ground circuit for a short to voltage.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Go To 9.
REPLACE THE OUTPUT SPEED SENSOR
1. Replace the Output Speed Sensor.
2. Reconnect all connectors.
3. Clear DTCs and road test the vehicle under the conditions in which the original DTC set.
  Did the loss of Output Speed Sensor/wheel speed 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
  - Test complete.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
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
  - Repair as necessary.
  - Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Test Complete.