P0713-TRANSMISSION TEMPERATURE SENSOR HIGH





For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The temperature sensor is used to sense the temperature of the transmission fluid. Transmission fluid temperature can affect shift quality, torque converter operation and when or if some diagnostics are run. A failed temperature sensor could affect the OBD diagnostics. If a problem occurs in the transmission temperature sensor circuit, transmission temperature will be based on a calculated value.


  • 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 1.45 seconds. When the fault is set, calculated temperature is substituted for measured temperature, however the fault code is stored only after three consecutive occurrences of the fault.


Possible Causes
 
(K900) SENSOR GROUND OPEN
 
(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
 
(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION TEMPERATURE SENSOR
 
POWERTRAIN CONTROL MODULE
 


Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)


1.CHECK TO SEE IF DTC IS CURRENT



Is the status Active for this DTC or is STARTS SINCE SET counter 2 or less?

Yes
  • Go To 2


No
  • Go To 6

2.CHECK THE PCM AND WIRING WITH THE TRANSMISSION SIMULATOR



CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.


WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in personal injury or death.








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

Yes


No
  • Go To 3

3.CHECK THE (T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN






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.




Is the resistance above 5.0 ohms?

Yes


No
  • Go To 4

4.CHECK THE (K900) SENSOR GROUND CIRCUIT FOR AN OPEN






Is the resistance above 5.0 ohms?

Yes


No
  • Go To 5

5.CHECK THE (T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE







Is the voltage above 0.5 volts?

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. Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply. If no problems are found, replace the PCM per the Service Information. With the scan tool, perform QUICK LEARN.
  • Perform 42RLE TRANSMISSION VERIFICATION TEST (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

6.INTERMITTENT WIRING AND CONNECTORS







Were there any problems found?

Yes


No
  • Test Complete.