Test Notes

Diagnostic Trouble Codes
PO743/629 Torque Converter Clutch Solenoid Circuit Failure

Components
- Transmission Wiring Harness, Torque Converter Clutch Solenoid, Vehicle Power (VPWR)
- Powertrain Control Module.

NOTE: This Pinpoint Test is designed to diagnose the Torque Converter Clutch Solenoid electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:
^ Electrical - Battery, input sensors, wiring harnesses, brake switch
^ Transmission - Internal transmission components, linkage, cooling