F2: Use Seat Controls To Diagnose Position Sensors
Ignition switch in RUN or ACC. Using seat control buttons, command an axis move. If the axis motor runs for 0.8 seconds and then stops, locate and service open sensor ground, open/grounded sensor signal line, open/grounded sensor supply line. If the axis motor does not run for 0.8 seconds and then stops, return to the beginning of this testing section and repeat the tests until operation is correct.