Code 39: TCC Circuit (3.3L/3.8L W/440-T4 Trans): Notes

Code 39 will set when no Code 29 is set, brake is not applied, TCC is commanded by ECM, transmission is in high gear, engine speed/vehicle speed ratio does not indicate that TCC has engaged, and all of the mentioned conditions have been met for greater than 15 seconds (3.3L) or 30 seconds (3.8L).

1. Checks fuse, brake switch and battery power circuit to the TCC solenoid.
2. Checks availability of battery voltage at circuit No. 420.
3. Electrical circuits have checked out okay. If there is a TCC engagement problem still, problem is possibly caused by a transmission internal hydraulic failure.