Code 39 alone indicates a problem at:

• Brake input circuit between splice and TCC solenoid.
• TCC drive circuit between TCC solenoid and ECM.
• Poor connection to ECM or ECM itself.

Fig 1: Code 39, Using Tech 1, W/4T60 Transaxle, TCC Ckt, Schematic

Fig 2: Code 39, TCC Ckt, Flow Chart, W/4T60 Transaxle

Fig 3: Code 39 Flow Chart