P0713-TRANSMISSION TEMPERATURE SENSOR HIGH





For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The Transmission Temperature Sensor is a variable resistor that changes with temperature, or otherwise known as a thermister. The temperature of the transmission fluid can affect a variety of electronically controlled transmission operations such as shift quality, torque converter lock-up, and when and/or if certain OBDII or system self-diagnostic test are performed. The Transmission Control Module (TCM) substitutes a calculated transmission temperature value if a fault is detected in the Transmission Temperature Sensor circuit.


  • When Monitored:

    Continuously with the ignition on and engine running.

  • Set Condition:

    The DTC will set when the monitored Temperature Sensor voltage rises above 4.94 volts for the period of 0.45 seconds.


Possible Causes
  
RELATED DTC'S PRESENT
  
(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO OTHER CIRCUITS
  
TRANSMISSION TEMPERATURE SENSOR
  
TRANSMISSION CONTROL MODULE
  

Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)



Diagnostic Test

1.CHECK FOR RELATED DTCS



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

Yes
  • Refer to the Transmission category and perform the appropriate symptom.


No
  • Go To 2

2.CHECK IF DTC IS CURRENT


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



Is the STARTS SINCE SET counter 2 or less?

Yes
  • Go To 3


No
  • Go To 5

3.CHECK THE TRANSMISSION TEMPERATURE SENSOR



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.








Do the readings on the Transmission Simulator match the scan tool readings ± 0.2 volts?

Yes


No
  • Go To 4

4.CHECK THE (T54) TRANSMISSION SENSOR SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT








Is the resistance below 5.0 ohms between the (T54) Transmission Temperature Sensor Signal circuit and any other circuit(s) in the Transmission Solenoid/TRS Assembly harness connector?

Yes


No
  • Using the schematics as a guide, check the Powertrain Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. With the scan tool, perform QUICK LEARN.
  • Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

5.CHECK WIRING AND CONNECTORS






Were there any problems found?

Yes


No
  • Test Complete.