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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> (Powertrain Control Module (Pcm) - Electrical Diagnostics - 545RFE Automatic Transmission) >> DTC Troubleshooting >> P0714-Transmission Temperature Sensor Intermittent >> Diagnostic Test

Diagnostic Test

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

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

      Yes 

      No 

      • Go to step  2
  2. CHECK IF THE DTC IS CURRENT 
    1. With the scan tool, read DTCs.

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

      Yes 

      • Go to step  3

      No 

      • Go to step  4
  3. CHECK THE TRANSMISSION TEMPERATURE SENSOR 
    1. Turn the ignition off to the lock position.
    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 from the PDC. Failure to do so may 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 8333.
    4. Ignition on, engine not running.
    5. With the Transmission Simulator, turn the Input/Output switch to OFF.
    6. With the scan tool, monitor the Transmission Temperature voltage while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator.
    7. 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 of a volt?

      Yes 

      No 

      • 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 and program the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn.
      • Perform the 545RFE TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  4. 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 was set.

      Were there any problems found?

      Yes 

      No 

      • Test Complete.