Pinpoint Test H : TCC (Torque Converter Clutch) Solenoid: Notes
Refer to Transmission Controls - 6F35 for schematic and connector information.
Normal Operations
The PCM controls torque converter lock-up by varying the amount of current applied to the TCC solenoid. When no current is applied to the TCC solenoid, the TCC is fully released. When maximum current is applied, the TCC is fully applied.
NOTE:
Without a voltage signal return to the PCM, the transmission solenoid power control relay is commanded OFF. Using a fused jumper wire between a transmission solenoid control circuit and the signal return circuit, the transmission solenoid power control relay circuit supplies power to the transmission solenoids when the ignition is cycled from off to on. Do not use a solenoid control circuit that may be at fault, refer to DTC Charts for a fault listing.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0740 | Torque Converter Clutch Solenoid Circuit/Open | Open circuit in the TCC solenoid or wiring harness. |
| P0742 | Torque Converter Clutch Solenoid Circuit Stuck On | Short to ground in the TCC solenoid or wiring harness. |
| P0743 | Torque Converter Clutch Solenoid Circuit Electrical | Open or short to ground in the TCC solenoid or wiring harness. |
| P0744 | Torque Converter Clutch Solenoid Circuit Intermittent | Short to power in the TCC solenoid or wiring harness. |
| P2758 | Torque Converter Clutch Pressure Control Solenoid Stuck On | This DTC sets when the TCC is stuck in the ON position or solenoid or there is a short to power. |
| P2760 | Torque Converter Clutch Pressure Control Solenoid Intermittent | Intermittent circuit in the TCC solenoid or wiring harness. Open, short to ground or short to power. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- TCC solenoid
- Transmission internal wiring harness frame
- PCM