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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1665 (66RFE Automatic Transmission - DTCS P0218 To P0870 - 2500 Hd) >> DTC Troubleshooting >> P0869-Line Pressure High >> Diagnostic Test

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.
  1. CHECK FOR RELATED DTCS 
    1. With the scan tool, read TCM DTCs.

      Is DTC P0882 or P0933 set?

      Yes 

      No 

      • Go To  2
  2. 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  3

      No 

      • Go To  11
  3. 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 from a higher value 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 terminals and repair as necessary.
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .

      No (value is still higher than 207 kPa (30 psi) or 0.7 volts and did not change or, the value was already 207 kPa (30 psi) or 0.7 volts and did not change.) 

      • Go To  4
  4. CHECK THE PCM AND WIRING 
    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. 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 during the following step.
    7. Using the Transmission Simulator, set the rotary switch to each of the 3 line pressure positions.
      NOTE:

      All three scan tool Line Pressure readings should be steady and ±14 kPa (2.0 psi) or 0.1 volts of the reading specified on the Transmission Simulator.

      Did the Line Pressure read within ±14 kPa (2.0 psi) or 0.1 volts in all three positions?

      Yes 

      • Go To  5

      No 

      • Go To  6
  5. CHECK THE LINE PRESSURE SENSOR CALIBRATION 
    1. Turn the ignition off.
    2. Disconnect the Transmission Simulator (special tool #8333B, Simulator, Transmission) and reconnect all previously disconnected connectors.
    3. Install the Line Pressure Adaptor (special tool #8259, Adapter, Pressure Test), and the 0-300 psi Pressure Gauge (special tool #C-3293-SP, Gauge, Pressure 0-300 P.S.I.).
    4. Start the engine.
    5. Monitor the Line Pressure readings on the scan tool and the pressure gauge.
    6. Compare the Line Pressure readings between the scan tool and the pressure gauge.

      Is the pressure gauge reading within 34 kPa (5 psi) of the scan tool reading?

      Yes 

      • Repair the internal Transmission and inspect the Transmission Oil Pump in accordance with the Service Information and replace if necessary. If no problem is found, replace the Transmission Solenoid/TRS Assembly, possible cause is a stuck Pressure Control Solenoid.
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .

      No 

  6. CHECK THE (T118) LINE PRESSURE (LP) VARIABLE FORCE SOLENOID (VFS) CONTROL CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the Transmission Simulator (special tool #8333B, Simulator, Transmission).
    3. Disconnect the Powertrain Control Module 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.

    4. Important:  The GPEC Diagnostic Adaptor can add up to 1.5 Ohms of resistance to the circuit.
    5. Connect the (special tool #10436, Adapter, GPEC Diagnostic) to the appropriate PCM harness connector.
    6. Measure the resistance of the (T118) LP VFS Control circuit between the Solenoid/TRS Assembly harness connector and the GPEC Diagnostic Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  7

      No 

  7. CHECK THE (T118) LP VFS CONTROL CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (T118) LP VFS Control circuit at the GPEC Diagnostic Adaptor.

      Is there continuity between ground and the (T118) LP VFS Control circuit?

      Yes 

      No 

      • Go To  8
  8. CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN 
    1. Disconnect the PCM C2 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.

    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. Measure the resistance of the (F856) 5-volt Supply circuit between the Line Pressure Sensor harness connector and the GPEC Diagnostic Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  9

      No 

  9. CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    1. 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.

    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 the Line Pressure Sensor harness connector.
    5. Check for continuity between ground and the (F856) 5-volt Supply circuit at the Line Pressure Sensor harness connector.

      Is there continuity between ground and the (F856) 5-volt Supply circuit?

      Yes 

      No 

      • Go To  10.
  10. 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 

      No 

  11. 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 any problems found?

      Yes 

      No 

      • Test complete.
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