OPERATION N° Dbw. IE - 142-0 : Adjusting the idling speed Op. Dbw. IE- 142-0 1 DBW. IE VEHICLES ADJUSTING THE IDLING SPEED 10 388 10 387 NOTE: This adjustment must be made with the engine hot. Use of a workshop tachometer is essential. -Do not use the dashboard tachometer. 1, Shunt the electric tachometer onto the terminal « RUP » or «—» of the ignition coil. 2. Position the selector lever in the position «N >» or «P».