Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE CONDITION
1. Start the engine.
2. With the scan tool, read the Input Speed Sensor rpm.
  Is the Input Speed Sensor rpm below 400 rpm?
  
  Yes
  - Go To 2
  No
  - Go To 10
CHECK INPUT SPEED SENSOR CIRCUITS WITH SIMULATOR
1. Turn the ignition off.
2. Remove the Starter Relay.
  CAUTION:
  Removal of the Starter Relay will prevent the vehicle from being started in gear.
  
  WARNING:
  The Starter Relay must be removed. Failure to do so can result in possible serious or fatal injury.
3. Install the Transmission Simulator (special tool #8333B, Simulator, Transmission).
4. Turn the ignition on.
5. With the Transmission Simulator, set the selector switch to 3000/1000 and the Input/Output switch to ON.
6. With the scan tool, read the Input and Output Speed Sensor rpm.
  Does the Input speed read 3, 000 rpm and the Output speed read 1, 000 rpm ± 50 rpm?
  
  Yes
  - Replace the Input Speed Sensor in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.
3. Important: The GPEC Diagnostic Adaptor can add up to 1.5 Ohms of resistance to the circuit.
4. Connect the (special tool #10436, Adapter, GPEC Diagnostic) to the appropriate PCM harness connector.
  NOTE:
  Make sure to leave the Speed Sensor, Transmission Solenoid/TRS Assembly, and Line Pressure Sensor harness connectors disconnected.
5. Check for continuity between the (T52) Input Speed Sensor Signal circuit and all other circuits at the GPEC Diagnostic Adaptor.
  Is there continuity between the (T52) Input Speed Sensor Signal circuit and any other circuit?
  
  Yes
  - Repair the (T52) Input Speed Sensor Signal circuit for a short to another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT
1. Check for continuity between the (T13) Speed Sensor Ground circuit and all other circuits at the GPEC Diagnostic Adaptor.
  Is there continuity between the (T13) Speed Sensor Ground circuit and any other circuit?
  
  Yes
  - Repair the (T13) Speed Sensor Ground circuit for a short to another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN
1. Measure the resistance of the (T52) Input Speed Sensor Signal circuit between the Input Speed Sensor harness connector and the GPEC Diagnostic Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (T52) Input Speed Sensor Signal circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR AN OPEN
1. Measure the resistance of the (T13) Speed Sensor Ground circuit between the Input Speed Sensor harness connector and the GPEC Diagnostic Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 7
  No
  - Repair the (T13) Speed Sensor Ground circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (T52) Input Speed Sensor Signal circuit at the GPEC Diagnostic Adaptor.
  Is there continuity between ground and the (T52) Input Speed Sensor Signal circuit?
  
  Yes
  - Repair the (T52) Input Speed Sensor Signal circuit for a short to ground.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 8
(T13) SPEED SENSOR GROUND CIRCUIT SHORTED TO GROUND
1. Measure the resistance between ground and the (T13) Speed Sensor Ground circuit.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Repair the (T13) Speed Sensor Ground circuit for a short to ground.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 9
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM harness connectors.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.
2. Important: The GPEC Diagnostic Adaptor can add up to 1.5 Ohms of resistance to the circuit.
3. Connect the (special tool #10436, Adapter, GPEC Diagnostic) to the appropriate PCM harness connector.
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 PCM 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 Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
12. With the scan tool, read PCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module (PCM) in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL, (PCM) 5.7L / 6.4L, REMOVAL or MODULE, POWERTRAIN CONTROL, (PCM) 6.7L DIESEL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE 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 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Test complete.