ECU SELF-DIAGNOSTIC FUNCTION The ECU is equipped with a self-diagnostic function in order to ensure that the fuel injection system is operating normally. If this function detects a malfunction in the system, it immediately operates the engine under substitute characteristics and illuminates the engine trouble warning light to alert the rider that a malfunction has occurred in the system. Once a malfunction has been detected, a fault code is stored in the memory of the ECU. To inform the rider that the fuel injection sys- tem is not functioning, the engine trouble warning light flashes when the start switch is being pushed to start the engine.
If a malfunction is detected in the system by the self-diagnostic function, the ECU pro- vides an appropriate substitute characteristic operation, and alerts the rider of the detected malfunction by illuminating the engine trou- ble warning light. After the engine has been stopped, the low- est fault code number appears on the odom- eter/tripmeter LCD. Once a fault code has been displayed, it remains stored in the memory of the ECU until it is deleted. 1 1 Engine trouble warning light Engine trouble warning light indication and fuel injection system operation *The warning light flashes when any one of the conditions listed below is present and the start switch is pushed: 12:
Crankshaft position sensor 41: Lean angle sensor (open or short-circuit) 30: Lean angle sensor (latch up detected) 50: ECU internal malfunction (memory check error) 6 - 5 FUEL INJECTION SYSTEM FI FI Warning light indi- cation ECU operation Fuel injection opera- tion Vehicle operation Flashing* Warning provided when unable to start engine Operation stopped Cannot be operated Remains on Malfunction detected Operated with substi- tute characteristics in accordance with the description of the mal- function Can or cannot be operated depending on the fault code