Shift Interlock Solenoid The shift interlock solenoid is located at the front of the selector lever assembly. The selector lever is connected to a locking plate which has two holes which correspond to the 'P' and 'N' positions. When the ignition is on or the engine is running, the solenoid is energised by the EAT ECU when the selector lever is in the 'P' or 'N' positions. When energised, the solenoid ejects a pin which engages in the locking plate preventing the lever from being moved. When the footbrake is applied, a signal from a brake switch is passed to the EAT ECU which de-energises the solenoid allowing the lever to be moved from the 'P' or 'N' position. This prevents the selector from being moved to the 'D' or 'R' position unintentionally and the application of the brakes also prevents the vehicle 'creeping' when the gear is engaged. Movement of the selector lever from the 'P' or 'N' positions is also prevented if the EAT ECU senses that the engine speed is above 2500 rev/min, even if the brake pedal is depressed.