6. Verify the operation of the sensor or actua- tor. Sensor operation The data representing the operating condi- tions of the sensor appears on the LCD meter. Actuator operation Set the engine stop switch to “ON” to oper- ate the actuator. * If the engine stop switch is set to “ON”, set it to “OFF”, and then set it to “ON” again. 7. Turn the main switch to “OFF” to cancel the diagnostic mode. NOTE: To perform a reliable diagnosis, make sure to turn off the power supply before every check and then start right from the beginning. 6 - 9 FUEL INJECTION SYSTEM FI FI