Yamaha SR400 2014 Service Manual page 281

Engine trouble warning light indication and fuel injection system operation
Warning light
indication
Flashing*
Remains on
* The warning light flashes if the engine is cranked under any of the following conditions.
Blue/black ECU lead
19:
(broken or disconnected)
Lean angle sensor
30:
(latch up detected)
33: Faulty ignition
Checking the engine trouble warning light
The engine trouble warning light comes on for 3 seconds after the main switch has been set to "ON". If
the warning light does not come on under these conditions, the warning light bulb may be defective.
a. Main switch "OFF"
b. Main switch "ON"
c. Engine trouble warning light: Light off
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 illumi-
nates 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 operating or stop operating, depending on the conditions.
ECU operation
Warning provided
when unable to start
engine
Malfunction detected
FUEL INJECTION SYSTEM
Fuel injection
operation
Operation stopped
Operated with substi-
tute characteristics in
accordance with the
description of the mal-
function
Lean angle sensor
41:
(open or short circuit)
ECU internal malfunction
50:
(memory check error)
d. Engine trouble warning light: On for 3 sec-
onds
7-24
Vehicle operation
Cannot be operated
Can or cannot be oper-
ated depending on the
fault code number