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Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  CHECK IF THE DTC IS CURRENT 

    Start the engine in park.

    With the scan tool, read the AutoStick® voltage.

    Does the scan tool AutoStick voltage read above 4.75 volts? 

    Yes 

    1. Go To step  2).

    No 

    1. Go To step  7).
  2. 2)  CHECK THE (T5) AUTOSHIFT UP/DOWN SENSE CIRCUIT FOR A OPEN 
    Fig 1: Checking Autoshift Up/Down Sense Circuit For Open
    GC0027345Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off to the lock position.

    Disconnect the PCM C3 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.

    Disconnect the Shift Lever Assembly harness connector.

    Measure the resistance of the (T5) AutoStick Up/Down Sense circuit between the Shift Lever Assembly harness connector and the appropriate terminal of Miller tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To step  3).

    No 

    1. Repair the (T5) AutoStick Up/Down Sense circuit for an open.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .
  3. 3)  CHECK THE (K900) SENSOR GROUND CIRCUIT FOR AN OPEN 
    Fig 2: Checking Sensor Ground Circuit for Open
    GC0005180Courtesy of DAIMLERCHRYSLER CORP.

    Disconnect the PCM C2 harness connector and connect Miller tool #8815.

    Measure the resistance of the (K900) Sensor Ground circuit between the Shift Lever Assembly harness connector and the appropriate terminal of Miller tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To step  4).

    No 

    1. Repair the (K900) Sensor Ground circuit for an open.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .
  4. 4)  CHECK THE (T5) AUTOSHIFT UP/DOWN SENSE CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 3: Checking Autoshift Up/Down Sense Circuit For Short To Voltage
    GC0027343Courtesy of DAIMLERCHRYSLER CORP.

    Ignition on, engine not running.

    Measure the voltage of the (T5) AutoStick Up/Down Sense circuit.

    Is the voltage above 0.5 volts? 

    Yes 

    1. Repair the (T5) AutoStick Up/Down Sense circuit for a short to voltage.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .

    No 

    1. Go To step  5).
  5. 5)  CHECK THE (T5) AUTOSHIFT UP/DOWN SENSE CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT 
    Fig 4: Checking Autoshift Up/Down Sense Circuit For Short To Another Circuit
    GC0027342Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off to the lock position.

    Measure the resistance between the (T5) AutoStick Up/Down Sense circuit and all other circuits in the Shift Lever Assembly harness connector.

    Is the resistance below 5.0 ohms between the (T5) AutoStick Up/Down Sense circuit and any other circuit(s) in the Shift Lever Assembly harness connector. 

    Yes 

    1. Repair the (T5) AutoStick Up/Down Sense circuit for a short to another circuit(s).
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .

    No 

    1. Go To step  6).
  6. 6)  CHECK THE AUTOSTICK SWITCH 
    Fig 5: Checking Autostick Switch
    GC0027346Courtesy of DAIMLERCHRYSLER CORP.

    Reconnect the PCM C2 and C3 harness connectors.

    Connect a jumper wire between (T5) AutoStick Up/Down Sense circuit and (K900) Sensor Ground circuit in the Shift Lever Assembly harness connector.

    Ignition on, engine not running.

    With the scan tool, read the AutoStick voltage.

    Did the scan tool AutoStick voltage drop below 0.5 volts? 

    Yes 

    1. Replace the Shift Lever Assembly per the Service Information.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .

    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. If no problems are found, replace the PCM per the Service Information. With the scan tool, perform QUICK LEARN.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .
  7. 7)  CHECK THE AUTOSTICK VOLTAGE WHILE SHIFTING 

    Start the engine in park.

    With the brakes firmly applied, shift into AutoStick.

    With the scan tool, monitor the AutoStick voltage while shifting both low and high.

    Did the scan tool AutoStick voltage rise above 4.75 volts at any given time? 

    Yes 

    1. Replace the Shift Lever Assembly per the Service Information.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .

    No 

    1. Go To step  8).
  8. 8)  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 wiring and connectors while checking for any possible open or shorted circuits.

    Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .

    No 

    1. Test Complete.
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