Note. Perform OBD system check prior to performing diagnostic procedures. For wire circuit identification, see WIRING DIAGRAMS . For fluid circuit identification, see OIL CIRCUIT DIAGRAMS in section No. 1.
Circuit Description
PCM monitors Torque Converter Clutch (TCC) slip speed by calculating difference between engine speed and transaxle output speed. DTC P1870 detects excessive TCC slip when TCC is engaged.