Code 39 - TCC Circuit Using Tech 1 (3.8L W/4T60 Trans): Notes
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Code 39 will set when Codes 28 and 29 are not set, brake is not applied, TCC is commanded by ECM, transaxle 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.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Tests fuse, brake switch and battery power circuit to TCC solenoid.
- Tests for ECM driver operation at TCC harness connector.
- Tests for ECM driver operation at ECM terminal.