Code E039, Torque Converter Clutch (TCC) Circuit: Notes
The ECM controls TCC operation by grounding circuit No. 422 through the QDM. Code E039 will set under the following conditions:
- Code E029 is not present
- Brake switch is closed (off)
- TCC is commanded on by ECM
- Vehicle is in 4th gear
- The engine speed to vehicle speed ratio is outside of its window of operation
- All of the above for a time greater than 30 seconds
NOTE:
Test numbers refer to numbers on diagnostic chart.
Test Number 1) Checks availability of battery voltage on circuit No. 420.
Test Number 2) Check fuse, brake switch and battery voltage circuit to the TCC solenoid.