Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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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