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Home >> Jeep >> 2010 >> Compass Limited, ED3, AWD, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) - Electrical Diagnostics >> DTC Troubleshooting >> DTC P0712: Transmission Temperature Sensor Low >> Diagnostic Test

Diagnostic Test

  1. CHECK IF THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE 
    1. Using the scan tool, read Transmission DTCs.

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

      Yes 

      • Go to step  2

      No 

      • Go to step  4
  2. CHECK THE (T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 1: Measuring Resistance Between Ground & Transmission Temperature Sensor Signal Circuit
    GC0100313Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the TCM C2 harness connector.
    3. Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
    4. Measure the resistance between ground and the (T54) Transmission Temperature Sensor Signal circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      No 

      • Go to step  3
  3. CHECK THE (T54) TRANSMISSION TEMPERATURE SENSOR 
    Temperature Sensor Resistive Values Table 
    Transmission Temperature Resistive Value Compared to Temperature (± 10%)
    20°C (68°F) 2.5k to 6.5k Ohms
    80°C (176°F) 0.3k to 0.9k Ohms
    Fig 2: Measuring Resistance Between Transmission Temperature Sensor Signal Circuit & Sensor Ground Circuit In TCM Harness Connector
    GC0100312Courtesy of CHRYSLER LLC
    1. Reconnect all previously disconnected connectors.
    2. Start the engine and allow to obtain normal operating temperature (approximately 10 min. of engine run time).
    3. Turn the ignition off to the lock position.
    4. Disconnect the TCM C2 harness connector.
    5. Measure the resistance between the (T54) Transmission Temperature Sensor Signal circuit and the (T13) Sensor Ground circuit in the TCM C2 harness connector.

      Is the resistance within the desired range listed on the above chart?

      Yes 

      • Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM in accordance with the appropriate Service Information.
      • Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .

      No 

  4. INTERMITTENT 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.

      Were there any problems found?

      Yes 

      No 

      • Test Complete.
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