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 11
CHECK THE TRANSMISSION HARNESS CONNECTOR
1. Turn the ignition off.
2. Check the Transmission C1 harness connector for proper installation, damage, and corrosion.
  Is the connector installed properly and in good condition?
  
  Yes
  - Reconnect the Transmission C1 harness connector and Go To 3.
  No
  - Repair the connection in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
CHECK THE HARNESS AND SPEED SENSOR RESISTANCE
1. Disconnect the TCM C1 harness connector
  NOTE:
  The Input Speed Sensor is a Hall Effect sensor. When measuring the resistance of the sensor, if an open reading is observed, reverse the leads of the Ohm meter and recheck.
2. Measure the resistance between the (T52) Input Speed Signal circuit and the (T69) Input Speed Sensor Supply circuit at the TCM C1 harness connector.
  Is the resistance between 3M Ohms and 5M Ohms?
  
  Yes
  - Go To 4
  No
  - Go To 6
CHECK THE HARNESS AND SPEED SENSOR FOR A SHORT TO GROUND
1. Check for continuity between ground and the (T52) Input Speed Signal circuit at the TCM harness connector.
  Is there continuity between ground and the (T52) Input Speed Signal circuit?
  
  Yes
  - Go To 8
  No
  - Go To 5
CHECK THE SPEED SENSOR CIRCUITS FOR A SHORT TO ANOTHER CIRCUIT
1. Check for continuity between the (T52) Input Speed Signal circuit and all other circuits at the TCM C1 harness connector.
2. Check for continuity between the (T69) Input Speed Sensor Supply circuit and all other circuits at the TCM C1 harness connector.
  NOTE:
  Continuity between the (T69) Input Speed Sensor Supply circuit and the (T52) Input Speed Signal circuit does not require a repair. Continuity is expected because the Speed Sensor is still connected in the Transmission.
  
  Is there continuity between the speed sensor circuits and any other circuit in the TCM C1 harness connector?
  
  Yes
  - Repair the speed sensor circuit(s) for a short to another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Go To 10
CHECK (T52) INPUT SPEED SIGNAL CIRCUIT FOR AN OPEN CIRCUIT
1. Disconnect the Input Speed Sensor harness connector. Refer to SENSOR, SPEED, REMOVAL .
2. Measure the resistance of the (T52) Input Speed Signal circuit between the Input Speed Sensor harness connector and the TCM C1 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 7
  No
  - Repair the (T52) Input Speed Signal circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
CHECK (T69) INPUT SPEED SENSOR SUPPLY CIRCUIT FOR AN OPEN CIRCUIT
1. Measure the resistance of the (T69) Input Speed Sensor Supply circuit between the Input Speed Sensor harness connector and the TCM C1 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Replace the Input Speed Sensor in accordance with the Service Information. Refer to SENSOR, SPEED, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Repair the (T69) Input Speed Sensor Supply circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
CHECK THE (T52) INPUT SPEED SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Disconnect the Input Speed Sensor harness connector. Refer to SENSOR, SPEED, REMOVAL .
2. Check for continuity between ground and the (T52) Input Speed Signal circuit at the Input Speed Sensor harness connector.
  Is there continuity between ground and the (T52) Input Speed Signal circuit?
  
  Yes
  - Repair the (T52) Input Speed Signal circuit for a short to ground.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Go To 9
CHECK THE (T69) INPUT SPEED SENSOR SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (T69) Input Speed Sensor Supply circuit at the Input Speed Sensor harness connector.
  Is there continuity between ground and the (T69) Input Speed Sensor Supply circuit?
  
  Yes
  - Repair the (T69) Input Speed Sensor Supply circuit for a short to ground.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Replace the Input Speed Sensor in accordance with the Service Information. Refer to SENSOR, SPEED, REMOVAL .
  - 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.
5. Inspect the Input Speed Sensor for damage and contamination.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to AS69RC TRANSMISSION VERIFICATION TEST .
  No
  - Test complete.