Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR OTHER DTCS
1. With the scan tool, read TCM DTCs and record on the repair order
  Are any Loss of Prime, TCM Power Control Circuit, and or TCM Power Input DTCs set?
  
  Yes
  - Repair Loss of Prime, TCM Power Control Circuit, and or TCM Power Input DTCs. If DTC P0944 is set, perform that diagnostic procedure first. Refer to DIAGNOSTIC CODE INDEX - 65RFE AUTOMATIC TRANSMISSION - 1500 article .
  No
  - Go To 2
CHECK FOR DTC P0755
1. With the scan tool, read TCM DTCs.
  Is DTC P0755 set?
  
  Yes
  - Repair DTC P0755. Refer to P0755-2C SOLENOID CIRCUIT .
  No
  - Go To 3
CHECK FOR OTHER TCM DTCS
1. With the scan tool, read TCM DTCs.
  Are DTCs P0732, P0735, and or P0846 set?
  
  Yes
  - Go To 13
  No
  - Go To 4
CHECK FOR AN ACTIVE DTC
1. Record the Event Data and Environmental Data.
2. With the scan tool, erase DTCs.
3. 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.
4. With the scan tool, read TCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 5
  No
  - Go To 17
CHECK LINE PRESSURE IN EACH GEAR
1. Start the engine.
2. Allow the Transmission temperature to reach 82° C or 180° F.
3. Firmly apply the brakes.
4. Move the shift lever to each gear position, pausing momentarily in each position to record the line pressure reading on the scan tool. Allow the pressure to stabilize for at least five seconds in each range.
  Did the line pressure read between 585 and 655 kPa (85 and 95 psi) in each position?
  
  Yes
  - Go To 6
  No
  - Go To 11
CHECK THE LINE PRESSURE SENSOR CONNECTION
1. Turn the ignition on.
2. With the scan tool, read the Line Pressure while firmly pushing the Transmission Line Pressure Sensor connector inwards towards the Transmission.
  Did the Line Pressure reading on the scan tool change to about 207 kPa (30 psi) or 0.7 volts when the connector was pushed inward?
  
  Yes
  - Disconnect and properly reconnect the Line Pressure Sensor connector. Inspect the terminals and repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 7
CHECK THE LINE PRESSURE SENSOR OPERATION
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.
  
  NOTE:
  Failure to remove the Starter Relay can cause a Transmission - No Response condition.
3. Install the Transmission Simulator (special tool #8333B, Simulator, Transmission).
4. With the Transmission Simulator, select the OFF position on the Input/Output Speed switch.
5. Turn the ignition on.
6. With the scan tool, read the Line Pressure while turning the Pressure Switch selector to each of the three line pressure positions on the Transmission Simulator.
  NOTE:
  All three scan tool Line Pressure readings should be steady and read within ±14 kPa (2.0 psi) or 1.0 volt of the reading specified on the Transmission Simulator.
  
  Did the scan tool Line Pressure readings match the specified readings on the Transmission Simulator and remain steady in all three positions?
  
  Yes
  - Replace the Line Pressure Sensor in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 8
CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Transmission Simulator (special tool #8333B, Simulator, Transmission).
3. Disconnect the PCM C1 harness connector.
4. Measure the resistance of the (F856) 5-volt Supply circuit between the Line Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 9
  No
  - Repair the (F856) 5-volt Supply circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (F856) 5-volt Supply circuit at the PCM C1 harness connector.
  Is there continuity between ground and the (F856) 5-volt Supply circuit?
  
  Yes
  - Repair the (F856) 5-volt Supply circuit for a short to ground.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 10
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM 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 PCM 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 PCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module (PCM) in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  - Test complete.
COMPARE SCAN TOOL LINE PRESSURE READING TO PRESSURE GAUGE READING
1. Turn the ignition off.
2. Connect the Pressure Test Adapter (special tool #8259, Adapter, Pressure Test) and the 0-300 psi Test Gauge (special tool #C-3293-SP, Gauge, Pressure 0-300 P.S.I.). Refer to the Service Information for proper installation procedure.
  CAUTION:
  Apply the parking brake.
3. Start the engine.
4. In the following steps, compare the scan tool Line Pressure to the Pressure Gauge readings in each gear.
  CAUTION:
  Do not overheat the transmission.
5. With the gear selector in park, raise the engine speed to 1, 500 RPM and compare line pressure readings.
6. Firmly apply the brakes, move the gear selector into reverse, raise the engine speed to 1, 500 RPM and compare the line pressure readings.
7. Firmly apply the brakes, move the gear selector into drive, raise the engine speed to 1, 500 RPM and compare the line pressure readings.
  Does the scan tool Line Pressure reading match the Pressure Gauge reading ± 10 psi for each test?
  
  Yes
  - Go To 12
  No
  - Replace the Line Pressure Sensor in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
CHECK 2C PRESSURE SWITCH CIRCUITS
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.
  
  NOTE:
  Failure to remove the Starter Relay can cause a Transmission - No Response condition.
3. Remove the Line Pressure Adapter (special tool #8259, Adapter, Pressure Test) and 0-300 psi Test Gauge (special tool #C-3293-SP, Gauge, Pressure 0-300 P.S.I.).
4. Install the Transmission Simulator (special tool #8333B, Simulator, Transmission).
5. On the Transmission Simulator, turn the Pressure Switch selector switch to 2C.
6. Turn the ignition on.
7. With the scan tool, read the 2C Pressure Switch state while pressing and holding the Pressure Switch test button and wiggling the wire harness and connectors that pertain to the 2C Pressure Switch.
  Did the 2C Pressure Switch state change to CLOSED and remain CLOSED while wiggling the wires?
  
  Yes
  - Go To 13
  No
  - Go To 15
CHECK FOR EXCESSIVE DEBRIS
1. Turn the ignition off.
2. Remove the Transmission Simulator (special tool #8333B, Simulator, Transmission).
3. Remove and inspect the Transmission Oil Pan in accordance with the Service Information.
  Does the Transmission Oil Pan contain excessive debris or contamination?
  
  Yes
  - Repair the cause of the excessive debris in the Transmission Oil Pan.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 14
CHECK THE 2C HYDRAULIC CLUTCH CIRCUIT
1. Remove the Valve Body and air check the 2C clutch hydraulic circuit in the 2C/4C clutch retainer for leakage in accordance with the Service Information.
  NOTE:
  The 2C hydraulic clutch circuit contains a small bleed orifice and a small amount of air leakage is normal.
  
  Was there excessive air leakage noticed during the air check?
  
  Yes
  - Repair as necessary. Check the 2C clutch piston, piston seals and bleed orifice assembly.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Disassemble and inspect the Valve Body and repair as necessary. Inspect the 2C Accumulator piston and seals. Check for an extra check ball downstream from the No. 7 check ball pocket and repair as necessary. If no problems are found in the Valve Body, replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
CHECK THE (T147) 2C PRESSURE SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT
1. Disconnect the PCM C1 harness connector.
2. Disconnect the Transmission Solenoid/TRS Assembly harness connector.
  NOTE:
  Make sure the Transmission Solenoid/TRS Assembly harness connector is disconnected.
3. Check for continuity between the (T147) 2C Pressure Signal circuit and all other circuits at the PCM C1 harness connector.
  Is there continuity between the (T147) 2C Pressure Signal circuit and any other circuit?
  
  Yes
  - Repair the (T147) 2C Pressure Signal circuit for a short to another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 16.
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM 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 PCM 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 PCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module (PCM) in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  - Test complete.
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set this 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. With the scan tool, check the Event Data to help identify the conditions in which the DTC set.
5. If the Event Data shows DTC P0845 set while the Line Pressure was significantly below the Desired Line Pressure reading, check for causes of low line pressure (low fluid level, broken or misinstalled primary oil filter or filter seal, sticking Main Regulator Valve in the Pump Valve Body etc.). If the data shows the DTC set while the Line Pressure reading was significantly higher than the Desired Line Pressure, check the Line Pressure Sensor and related wiring.
  Where any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 65RFE TRANSMISSION VERIFICATION TEST .
  No
  - Test complete.