Diagnostic Test

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR RELATED DTCS
1. With the scan tool, read DTCs.
2. If any of these DTCs are present, perform their respective test first.
  Are there any Transmission solenoid, line pressure, speed sensor, and/or loss of prime DTCs present?
  
  Yes
  - Is the only related DTC present P0933-00? If yes, go to 2
  - If any of these DTCs are present, they may cause a Speed Ratio Error. Perform the test for P0944-00 first if it is present. and perform the appropriate diagnostic procedure. Refer to DIAGNOSTIC CODE INDEX .
  No
  - Go To 2
CHECK EVENT DATA
1. Using the scan tool, read and record the Event Data.
  NOTE:
  Make sure to record all Event Data stored in the scan tool for future reference in this test procedure.
  
  Does the Event Data display information for DTC P0733-00?
  
  Yes
  - Go To 3
  No
  - Go To 6
CHECK THE INPUT RPM IN THE EVENT DATA
1. Refer to the Event Data recorded earlier.
  Does the Input RPM read zero?
  
  Yes
  - Check the input speed sensor and wiring. Refer to test P0716-00 and diagnose as if the DTC is current.
  No
  - Go To 4
CHECK LINE PRESSURE READING
1. Refer to the Event Data recorded earlier.
  Is the line pressure reading more than 10 psi below the desired line pressure?
  
  Yes
  - Go To 5
  No
  - Go To 6
CHECK TRANSMISSION OIL FILTER
1. Turn the ignition OFF.
2. Remove and inspect the Transmission Oil Pan for excessive debris in accordance with the Service Information.
3. Remove and inspect the Primary Oil Filter in accordance with the Service Information.
  NOTE:
  Make sure the Primary Transmission Oil Filter and seal are properly installed and are not cracked or split.
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  
  Does the Oil Pan contain excessive debris and/or is the Primary Oil Filter cracked, plugged or misinstalled?
  
  Yes
  - Repair the plugged, cracked or split Primary Transmission Oil Filter and/or seal. If excessive clutch debris is present, check the clutches for damage. Refer to the Service Information for the proper hydraulic clutch repair procedure.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Remove the Transmission Oil Pump in accordance with the Service Information. Check the main Regulator Valve for sticking in its bore, scoring and/or damage and clean and repair as necessary. If no problem is found, replace the Transmission Solenoid/TRS Assembly.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
CHECK IF DTC P0733 IS ACTIVE
1. With the scan tool, perform the 3rd Gear Clutch Test. Follow the scan tool instructions.
2. Increase the throttle angle, TPS Degree to 30° for no more than a few seconds.
  CAUTION:
  Do not overheat the transmission.
  
  NOTE:
  If the 4C clutch is faulty, the overrunning clutch will hold and the slip test will pass. The 3rd gear clutch test will not detect a faulty 4C clutch. However, it will detect a faulty UD clutch.
  
  Did the clutch test pass, did the Input Speed remain at zero?
  
  Yes
  - Go To 7
  No
  - Go To 9
CHECK FOR INTERMITTENT OPERATION
1. Check the Shifter adjustment in accordance with the Service Information. Refer to CABLE, SHIFT, ADJUSTMENTS .
  NOTE:
  Intermittent gear ratio DTCs can set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit.
2. Check the Speed Sensor wiring and connectors for good connection.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 8
CHECK FOR SLIPPAGE
1. Using the scan tool, erase transmission DTCs.
2. Road test the vehicle. Check operation in Reverse and all forward gears.
  Is an obvious slippage noticed in any gear?
  
  Yes
  - Go To 11
  No
  - Go To 14
CHECK THE UD HYDRAULIC CLUTCH CIRCUIT
1. Remove Transmission Oil Pan and check for excessive debris.
2. Remove the Valve Body and air check the UD hydraulic clutch circuit (in the case) in accordance with the Service Information.
  NOTE:
  The UD clutch passage contains a small bleed orifice and a small amount of air leakage is normal.
  
  Were any problems found, excessive debris and/or excessive air leakage in the UD hydraulic clutch circuit?
  
  Yes
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - Repair as necessary. Check the UD clutch piston seals, reaction shaft support seal rings, dribbler assemblies and the flatness of the pump valve body and pump housing faces. Check main regulator valve for sticking in the bore.
    NOTE:
    If the UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 10
CHECK UD ACCUMULATOR PISTON
1. Check the UD bleed orifice, accumulator piston and accumulator piston seal in the main valve body.
  Were any problems found?
  
  Yes
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - Repair as necessary. Refer to the Service Information for proper repair procedures.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 11
CHECK FOR EXCESSIVE DEBRIS
1. Remove the Transmission Oil Pan and check for excessive debris.
2. Remove the valve body and check if the accumulator cover is intact.
3. Air check the 4C hydraulic clutch circuit (in the case) in accordance with the Service Information.
  NOTE:
  The 4C clutch passage contains a small bleed orifice which connects to the Reverse clutch hydraulic circuit, a small amount of air leakage into the Reverse clutch passage is normal.
  
  Were any problems found, excessive debris and/or excessive air leakage in the 4C hydraulic clutch circuit?
  
  Yes
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - Repair as necessary. Refer to the Service Information for proper repair procedures. Note: Check the bleed orifice in the OD/Reverse clutch piston.
    NOTE:
    If the 4C clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, low line pressure in Event Data, etc.) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 12
CHECK THE 4C ACCUMULATOR
1. Check the 4C Accumulator piston for cracks or a cut seal.
2. Check for a cut or missing No. 5 check ball.
3. Check the Solenoid Switch Valve and its Plugs for sticking in its bore or excessive wear.
  Were any problems found?
  
  Yes
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - Repair as necessary. Refer to the Service Information for proper repair procedures.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 13
CHECK FOR FAILED REVERSE GEARSET
1. Working through the windows in the bottom of the case, check for a failed Reverse Sun or Annulus spline as follows:
  1. Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position.
  2. Apply the 4C clutch using 30-40 psi shop air at the apply port in the center bulkhead.
  3. Attempt to rotate the input annulus gear and drive shell (the drum that encloses the two rearmost gearsets).
  NOTE:
  Due to the overrunning clutch, the gear and drive shell normally rotates in one direction only.
  
  Can the drive shell be rotated?
  
  Yes
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - Repair internal transmission as necessary in accordance with the Service Information. Check the reverse annulus gear spline to the input carrier, the reverse sun gear spline to the reaction carrier hub, and the reaction sun gear weld to the 4C clutch hub.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 16
CHECK IF DTC RESETS
Did the DTC P0733-00 reset during the road test?

Yes
- Go To 15
No
- Go To 16
LIST OF POSSIBLE CAUSES
1. If other DTCs set during the road test, refer to the appropriate symptom in the Transmission diagnostic information.
2. If no other DTCs set during the road test, below is a list of possible causes, but not strictly limited to those.
3. Check for:
  - Excessive debris in the Transmission Oil pan, plugged, cracked or mis-installed Primary Transmission Oil Filter and/or seal.
  - Cut or missing No. 5 check ball in the main valve body.
  - 4C and UD accumulator pistons and seals, UD bleed orifices and the Solenoid Switch Valve and Plugs in the main valve body.
  - 4C and UD clutch piston seals, reaction shaft support seal rings and dribbler assemblies and the flatness of the pump valve body and pump housing faces.
  Repair
  
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. It is necessary to update the TCC solenoid PI data in the PCM when replacing the TCC solenoid, Valve Body or Transmission assembly. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine. The PI data is located on a 2-D BAR code etched on the body of the TCC solenoid. The data must be entered into the scan tool in order to upload the information to the PCM.
  
  When replacing the TCC solenoid or Valve Body, obtain the PI data before installing the transmission oil pan. When replacing the transmission, the PI data can be obtained from a 2-D bar code on the exterior of the new transmission. Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. If it is suspected that the valve body or TCC VFS has been replaced without uploading the correct PI data into the PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - Repair as necessary. Refer to the Service Information for proper repair procedures.
    NOTE:
    If the 4C or UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
CHECK FOR INTERMITTENT OPERATION
1. The conditions to set this DTC are not currently present.
2. Using the scan tool, check the Event Data to help identify the conditions in which the DTC was set.
  NOTE:
  This transmission is equipped with a solenoid for the Torque Converter Clutch (TCC) that is a Variable Force Solenoid (VFS) with close tolerance Pressure/Inductance (PI) curve. If replacing the PCM, it is necessary to transfer the PI data from the old PCM to the new PCM using the scan tool. If the PCM being replaced is non-responsive, the PI data can be retrieved from a 2-D bar code on the exterior of the transmission case. This is done with the scan tool using the "Program Torque Converter Solenoid PI Curve" routine.
  
  Early build transmissions will have the 2-D barcode label on the right side of the transmission case. Late build transmissions will have the label attached to a machined pad at the top of the case, near the rear of the transmission. The data must be entered into the scan tool in order to upload the information to the PCM. In the event that the exterior BAR code is missing, or it is suspected that the valve body or TCC solenoid has been replaced without uploading the correct PI data into an existing PCM, the transmission oil pan must be removed to retrieve the information from the 2-D bar code on the body of the TCC solenoid.
  - If the Event Data shows DTC P0733-00 set in the Park, Reverse or Neutral, replace the Powertrain Control Module. Refer to REMOVAL AND INSTALLATION .
  - If the Event Data shows DTC P0733-00 set with input RPM = zero, check the input speed sensor and related wiring.
  - If the Event Data shows DTC P0733 set with line pressure significantly below desired line pressure, check for the cause of low line pressure (i.e. oil level, misinstalled or damaged primary filter or filter seal, sticking main regulator valve in pump, etc.).
  - If the Event Data shows DTC P0733 set with the 4C or UD pressure switch open (but line pressure matches Desired Line Pressure), air check the 4C and UD hydraulic clutch circuits for leakage in accordance with the Service Information. If the 4C and UD hydraulic clutch circuits are OK, replace the Transmission Solenoid/TRS assembly.
  - If the Valve Body or the TCC VFS solenoid is replaced, remove the external TCC VFS bar code label from the transmission case.
3. Check the gearshift linkage adjustment.
4. Intermittent Gear Ratio DTCs can set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit.
5. Wiggle wiring and connectors while checking for intermittent operation.
6. Gear ratio DTCs can also be set under extreme temperature condition, verify the problem is only experienced under extreme hot or cold conditions.
  Were any problems found.
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  - Test Complete.