Code 39, TCC CKT Using Tech 1, W/4T60 Transaxle: Notes

Code 39 will set when Codes 28 and 29 are not set, brake is not applied, TCC is commanded by ECM, transmission is in high gear and engine speed-to-vehicle speed ratio does not indicate TCC has engaged. All these conditions must have been met for more than 15 seconds.

1. Tests fuse, brake switch and battery power circuit to TCC solenoid.
2. Tests for ECM driver operation at TCC harness connector.
3. Tests for ECM driver operation at ECM terminal.