Diagnostic Test

WARNING: This page is about a different car, the 2016 RAM 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read TCM DTCs and record on the repair order.
2. Record the Event Data and Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read TCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 7
CHECK THE (T819) TORQUE CONVERTER FLUID TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the TCM C2 harness connectors.
3. Disconnect the Torque Converter Fluid Temperature Sensor harness connector.
4. Check for continuity between the (T819) Torque Converter Fluid Temperature Sensor Signal circuit and all other circuits at the TCM C2 harness connector.
  Is there continuity between the (T819) Torque Converter Fluid Temperature Sensor Signal circuit and any other circuit?
  
  Yes
  - Repair the (T819) Torque Converter Fluid Temperature Sensor Signal circuit for a short to another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (T819) TORQUE CONVERTER FLUID TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN
1. Measure the resistance of the (T819) Torque Converter Fluid Temperature Sensor Signal circuit between the TCM C2 harness connector and the Torque Converter Fluid Temperature Sensor harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (T819) Torque Converter Fluid Temperature Sensor Signal circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
CHECK THE (T820) SENSOR GROUND CIRCUIT FOR AN OPEN
1. Measure the resistance of the (T820) Sensor Ground circuit between the TCM C2 harness connector and the Torque Converter Fluid Temperature Sensor harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (T820) Sensor Ground circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .

CHECK THE TORQUE CONVERTER FLUID TEMPERATURE SENSOR

TYPICAL VALUES FOR TRANSMISSION TEMPERATURE SENSOR
TEMPERATURE	APPROXIMATE OHM
25° C (77° F)	10999.7 Ohms
110° C (230° F)	691.7 Ohms

Turn the ignition off.
Reconnect the Torque Converter Fluid Temperature Sensor harness connector.
Measure the resistance of the Torque Converter Fluid Temperature Sensor between the (T819) Torque Converter Fluid Temperature Signal circuit and the (T820) Sensor Ground circuit in the TCM C2 harness connector.
Using the table above, compare the Torque Converter Fluid Temperature Sensor temperature to the correlating resistance value.
Is the resistance within the specified range when the sensor is at the given temperature?

Yes
- Go To 6
No
- Replace the Torque Converter Fluid Temperature Sensor in accordance with the Service Information.
- Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .

CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all TCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. 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.
5. Reconnect all TCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read TCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Transmission Control Module (TCM) in accordance with the Service information. Refer to MODULE, TRANSMISSION CONTROL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  - Test complete.
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.
4. Check for any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Test complete.