42RLE Transmission

P0711-TRANSMISSION TEMPERATURE SENSOR PERFORMANCE





For the Transmission circuit diagram , refer to Wiring Diagram Information.
^ When Monitored:
Continuously with the ignition on and engine running.
^ Set Condition:
DTC will set when the transmission temperature does not reach a normal operating temperature within a given time frame. Time is variable due to ambient temperature. Approximate DTC set time is 10 to 35 minutes. The following are starting temperature to warm up times to set this DTC: starting temp -40°C (-40°F)warm up time 35 minutes, starting temp -28°C (-20°F)25 min. starting temp -6.6°C (20°F)20 minutes, starting temp 15.5°C (60°F) 10 minutes. 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
- RELATED TRANSMISSION TEMPERATURE DTC'S PRESENT
- TRANSMISSION TEMPERATURE SENSOR
- POWERTRAIN CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 42RLE Automatic Transmission

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.

Diagnostic Test
1. DETERMINE IF RELATED TRANSMISSION TEMPERATURE DTCS ARE PRESENT
With the scan tool, check Transmission DTCs.
Are there any other Transmission Temperature Sensor related DTCs present?
Yes >>Refer to the Transmission category and perform the appropriate diagnostic procedure.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests
No >>Go To 2

2. CHECK TO SEE IF DTC IS ACTIVE
With the scan tool, view DTCs.
Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?
Yes >>Go To 3
No >>Go To 6

3. PCM AND WIRING
Turn the ignition off to the lock position.
Remove the Starter Relay.

CAUTION: Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and to disable the starter.

Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit 8333-1A.

NOTE: Check connectors - Clean/repair as necessary.

Ignition on, engine not running.
With the Transmission Simulator, turn the Input/Output switch to OFF.
With the scan tool, monitor the TRAMS 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 >>Go To 4
No >>Go To 5

4. TRANSMISSION TEMPERATURE SENSOR
If there are no possible causes remaining, view repair.
Repair
Replace Transmission Solenoid/TRS Assembly per the Service Information.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests

5. POWERTRAIN CONTROL MODULE
Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.

Repair
Replace the Powertrain Control Module per the Service Information. With the scan tool perform QUICK LEARN
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests

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 EATX DTC EVENT DATA to help identify the conditions in which the DTC was set.
Were there any problems found?
Yes >>Repair as necessary.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests
No >>Test Complete.