LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 ((40TE & 41TE Automatic Transmission - Electrical Diagnostics)) >> Automatic - 40/41TE >> DTC Troubleshooting >> P0868-Line Pressure Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) CHECK FOR RELATED DTCS 

    With the scan tool, read transmission DTCs.

    Is the DTC P0932 present also? 

    Yes 

    1. Refer to the applicable Transmission Information and perform the appropriate symptom.

    No 

    1. Go to  2).
  2. 2) CHECK IF THE DTC IS CURRENT 

    With the scan tool, check the STARTS SINCE SET counter for P0868.

    NOTE: This counter only applies to the last DTC set.

    Is the STARTS SINCE SET COUNTER 2 or less? 

    Yes 

    1. Go to  3).

    No 

    1. Go to  10).
  3. 3) CHECK THE PCM AND WIRING 

    Turn the ignition off to the lock position.

    Remove the Ignition Switch Feed fuse from the TIPM.

    CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.
    WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in personal injury or death.

    Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit.

    On the Transmission Simulator select the "OFF" position of the "Input/Output Speed" switch.

    Ignition on, engine not running.

    With the scan tool, monitor the Line Pressure during the following steps.

    Using the Transmission Simulator, set the rotary knob to each of the 3 line pressure positions.

    NOTE: All three scan tool Line Pressure readings should be steady and ± 14 kPa or 2.0 psi (0.2 volts) of the reading specified on the Transmission Simulator.

    Did the Line Pressure read within ± 14 kPa or 2.0 psi (0.2 volts) in all three positions? 

    Yes 

    1. Go to  4).

    No 

    1. Go to  6).
  4. 4) CHECK THE LINE PRESSURE SENSOR 

    Turn the ignition off to the lock position.

    Disconnect the Transmission Simulator, Miller tool #8333 and reconnect all previously disconnected connectors.

    Install a Pressure Gauge, 0 to 2000 kPa or 0 to 300 psi to the L/R test port.

    Start the engine in park.

    Monitor the line pressure readings of both the scan tool and the pressure gauge and compare the two readings.

    Is the line pressure gauge reading within 34 kPa or 5 psi of the scan tool reading? 

    Yes 

    1. Go to  5).

    No 

    1. Replace the Line Pressure Sensor per the Service Information.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .
  5. 5) CHECK FOR A PLUGGED TRANSMISSION OIL FILTER 

    Turn the ignition off to the lock position.

    Remove and inspect the Transmission Oil Pan for excessive debris per the Service Information.

    Remove and inspect the Transmission Oil Filter per the Service Information.

    Does the Oil Pan contain excessive debris and/or is the Transmission Oil Filter plugged? 

    Yes 

    1. Repair as necessary. If the Transmission Oil Filter is plugged or there is excessive debris, refer to the appropriate Service Information for the proper Hydraulic repair procedure.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .

    No 

    1. Repair internal transmission and inspect the Transmission Oil Pump per the Service Information and replace if necessary.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .
  6. 6) CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 1: Checking The (F856) 5-Volt Supply Circuit For A Short To Voltage
    GC0049908Courtesy of CHRYSLER LLC

    Disconnect the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit.

    Reconnect all previously disconnected connectors except the Line Pressure Sensor/Variable Force Solenoid Assembly harness connector.

    Ignition on, engine not running.

    With the scan tool under TIPM, actuate the Transmission.

    Measure the voltage of the (F856) 5-volt Supply circuit.

    Is the voltage above 5.5 volts? 

    Yes 

    1. Repair the (F856) 5-volt Supply circuit for a short to voltage.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .

    No 

    1. Go to  7).
  7. 7) CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN 
    Fig 2: Checking The (F856) 5-Volt Supply Circuit For An Open
    GC0049909Courtesy of CHRYSLER LLC

    Turn the ignition off to the lock position.

    Disconnect the PCM C1 harness connector and connect Miller tool #8815.

    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 Miller tool #8815 to perform diagnosis.

    Measure the resistance of the (F856) 5-volt Supply circuit between the Line Pressure Sensor/Variable Force Solenoid Assembly harness connector and the appropriate terminal of Miller tool #8815.

    Is the resistance above 5.0 ohms? 

    Yes 

    1. Repair the (F856) 5-volt Supply circuit for an open.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .

    No 

    1. Go to  8).
  8. 8) CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    Fig 3: Checking The (F856) 5-Volt Supply Circuit For A Short To Ground
    GC0049910Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the (F856) 5-volt Supply circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (F856) 5-volt Supply circuit for a short to ground.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .

    No 

    1. Go to  9).
  9. 9) CHECK THE (T118) PRESSURE CONTROL SOLENOID CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT 
    Fig 4: Checking Pressure Control Solenoid Control Circuit For A Short To Another Circuit
    GC0049911Courtesy of CHRYSLER LLC

    Turn the ignition off to the lock position.

    Disconnect the Line Pressure Sensor/Variable Force Solenoid Assembly harness connector.

    Disconnect all PCM harness connectors.

    Measure the resistance between the (T118) Pressure Control Solenoid Control circuit and all other circuits in the Line Pressure Sensor/Variable Force Solenoid Assembly harness connector.

    Is the resistance below 5.0 ohms between the (T118) Pressure Control Solenoid Control circuit and any other circuit(s) in the Line Pressure Sensor/Variable Force Solenoid Assembly harness connector? 

    Yes 

    1. Repair the (T118) Pressure Control Solenoid Control circuit for a short to another circuit(s).
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .

    No 

    1. Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins that may apply. If no problems are found, replace and program the PCM per the Service Information. With the scan tool perform the Quick Learn procedure.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .
  10. 10) INTERMITTENT WIRING AND CONNECTORS 

    The conditions necessary to set this DTC are not present at this time.

    Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

    Wiggle the wires while checking for shorted and open circuits.

    With the scan tool, check the DTC EVENT DATA to help identify the conditions in which the DTC was set.

    Check for any Service Bulletins that may apply.

    Where there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform 40/41TE TRANSMISSION VERIFICATION TEST .

    No 

    1. Test Complete.
scientia non olet · About LEMON Manuals