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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> 545RFE Automatic Transmission - Electrical Diagnostics >> Automatic Transmission 545RFE - Electrical Diagnostics >> DTC Troubleshooting >> P0714-Transmission Temperature Sensor Intermittent >> Diagnostic Test

Diagnostic Test

  1. 1) CHECK FOR RELATED DTCS 

    With the scan tool, read DTCs.

    Are there any line pressure or throttle position sensor DTCs present? 

    Yes 

    1. Refer to the DIAGNOSTIC CODE INDEX  table and perform the appropriate symptom.

    No 

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

    With the scan tool, read DTCs.

    Is the status Active or is the Starts Since Set counter 2 or less for this DTC? 

    Yes 

    1. Go to  3).

    No 

    1. Go to  4).
  3. 3) CHECK THE TRANSMISSION TEMPERATURE SENSOR 

    Turn the ignition off to the lock position.

    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 from the PDC. Failure to do so can result in personal injury or death.
    NOTE: Failure to remove the Starter Relay can cause a Transmission - No Response condition.

    Install the Transmission Simulator, Miller tool #8333.

    Ignition on, engine not running.

    With the Transmission Simulator, turn the Input/Output switch to OFF.

    With the scan tool, monitor the Transmission Temperature voltage while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator.

    Compare the scan tool readings with the numbers listed on the Transmission Simulator.

    Do the readings on the Transmission Simulator match a non-fluctuating scan tool reading ± 0.2 volts? 

    Yes 

    1. Replace Transmission Solenoid/TRS Assembly per the Service Information. Refer to REMOVAL .
    2. Perform 45RFE/545RFE 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. 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 .
  4. 4) CHECK 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 Event Data to help identify the conditions in which the DTC was set.

    Were there any problems found? 

    Yes 

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

    No 

    1. Test Complete.
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