To inform the rider that the fuel injection system 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 provides an appropriate substitute characteristic operation, and alerts the rider of the detected malfunction by illuminating the engine trouble warning light.
After the engine has been stopped, the lowest fault code number appears on the odometer/tripmeter/fuel reserve tripmeter/instantaneous fuel consumption/average fuel consumption LCD. Once a fault code has been displayed, it remains stored in the memory of the ECU until it is deleted.
Engine trouble warning light indication and FI system operation
| Warning light indication | ECU operation | FI operation | Vehicle operation |
| Flashing* | Warning provided when unable to start engine | Operation stopped | Cannot be operated |
| Remains on | Malfunction detected | Operated with substitute characteristics in accordance with the description of the malfunction | Can or cannot be operated depending on the fault code |
* The warning light flashes when any one of the conditions listed below is present and the start switch is pushed:
- 11: Cylinder identification sensor
- 12: Crankshaft position sensor
- 19: Sidestand switch (open circuit in the wire to the ECU)
- 30: Lean angle sensor (latch up detected)
- 41: Lean angle sensor (open or short-circuit)
- 50: ECU internal malfunction (faulty ECU memory)
Checking the engine trouble warning light
The engine trouble warning light comes on for 1.4 seconds after the main switch has been turned to "ON" and it comes on while the start switch is being pushed. If the warning light does not come on under these conditions, the warning light (LED) may be defective.
a. Main switch "OFF"; b. Main switch "ON"; c. Engine trouble warning light off; d. Engine trouble warning light on for 1.4 seconds
ECU detects an abnormal signal from a sensor
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU illuminates the engine trouble warning light and provides the engine with alternate operating instructions that are appropriate for the type of malfunction.
When an abnormal signal is received from a sensor, the ECU processes the specified values that are programmed for each sensor in order to provide the engine with alternate operating instructions that enable the engine to continue to operate or stop operating, depending on the conditions.