P0713
P0713 - Transmission Temperature Sensor High
For a complete wiring diagram, refer to.
Theory of Operation
The temperature sensor is used to sense the temperature of the transmission fluid. The 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 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.
Always perform the pre-diagnostic troubleshooting procedure before proceeding. Refer to => Non-DTC Based Diagnostics. Pre-Diagnostic Troubleshooting Procedure
Test Step 1 - Determine if DTC is Current
• With the scan tool, view DTCs.
Is the status active for this DTC or is STARTS SINCE SET counter 2 or less?
Yes
• Go to Test Step 2.
No
• Go to Test Step 6.
Test Step 2 - Check the PCM and Wiring with the Transmission Simulator
The starter solenoid relay must be removed from the TIPM. Failure to do so can result in personal injury or death.
Removal of the starter solenoid relay from the TIPM will prevent the vehicle from being started in gear.
• Turn the ignition to the lock position.
• Remove the starter solenoid relay from the TIPM.
• Install the transmission simulator, Miller tool #8333 and the electronic transmission adapter kit.
• Ignition ON, engine not running.
• With the transmission simulator, turn the input/output switch to OFF.
• With the scan tool, monitor the trans temp volts 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 the scan tool readings ± 0.2 volts?
Yes
• Replace the transmission solenoid/pressure switch assembly.
• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test
No
• Go to Test Step 3.
Test Step 3 - Check the Transmission Temperature Signal Circuit for an Open
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.
• Turn the ignition OFF to the lock position.
• Disconnect the PCM C4 harness connector.
• Disconnect the transmission solenoid/TRS assembly harness connector
• Measure the resistance of the transmission temperature signal circuit between the appropriate terminal of Miller tool #8815 and the transmission solenoid/TRS assembly harness connector.
Is the resistance more than 5.0 ohms?
Yes
• Repair the signal circuit for an open.
• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test
No
• Go to Test Step 4.
Test Step 4 - Check The Sensor Ground Circuit For An Open
• Disconnect the PCM C2 harness connector.
• Measure the resistance of the sensor ground circuit between the appropriate terminal of Miller tool #8815 and the transmission solenoid/TRS assembly harness connector.
Is the resistance more than 5.0 ohms?
Yes
• Repair the ground circuit for an open.
• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test
No
• Go to Test Step 5.
Test Step 5- Check The Transmission Temperature Sensor Signal Circuit For A Short To Voltage
• Ignition ON, engine not running.
• With the scan tool in the TIPM, actuate the TCM output.
• Measure the voltage of the transmission temperature signal circuit in the appropriate terminal of Miller tool #8815.
Is the voltage more than 0.5 volts?
Yes
• Repair the sensor signal circuit for a short to voltage.
• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test
No
• Using the schematics as a guide, check the PCM terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for service bulletins for any possible causes that may apply. If no problems are found, replace the PCM. With the scan tool, perform Quick Learn.
• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test
Test Step 6- Intermittent 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 DTC event data to help identify the conditions in which the DTC was set.
• Check for any service bulletins for any possible causes that may apply.
Were there any problems found?
Yes
• Repair as necessary.
• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test
No
• Test Complete.