Transmission Control Switch/Transmission Control Indicator Light

Transmission Control Switch (TCS) is mounted on gearshift lever handle. Transmission Control Indicator Light (TCIL) is mounted on instrument panel. Switch controls operation of 4th gear. TCIL indicates overdrive cancel mode activated (light on) and EPC circuit shorted (light flashing) or monitored sensor failure. Malfunction of switch will cause lack of 4th gear disable function. To diagnose inoperative TCIL, see SYMPTOM TESTS  .