Pinpoint Test K: Torque Converter Clutch Operation

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions
- Torque converter clutch (TCC) does not apply
  - Access the PCM/ TCM and monitor parameter identifications (PIDs) TCC, TC_SLIPDSD and TC_SLIPACT. Road test the vehicle, making sure TCC lockup is attempted. If the parameter identifications (PIDs) indicate the TCC is slipping when lockup is commanded, check the TCC for a does not apply condition. REFER to: Torque Converter Clutch (TCC) .
- Torque converter clutch (TCC) always applied
  - Access the PCM/ TCM and monitor parameter identifications (PIDs) TCC, TC_SLIPDSD and TC_SLIPACT. Start the engine and select Drive. If the parameter identifications (PIDs) indicate the TCC does not slip and the engine lugs or stalls when Drive is selected, check the TCC for an always applied condition. REFER to: Torque Converter Clutch (TCC) .
- Torque converter clutch (TCC) cycles, shudders, chatters
  - Check the transmission fluid level. REFER to: Transmission Fluid Level Check .
  - Access the PCM/ TCM and monitor parameter identifications (PIDs) TCC, TC_SLIPDSD and TC_SLIPACT. Road test the vehicle, making sure TCC lockup is attempted. If the parameter identifications (PIDs) indicate TCC shuddering, check the TCC for a shuddering condition. REFER to: Torque Converter Clutch (TCC) .
Possible Sources
- Torque converter clutch fault
Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods