Yamaha GRIZZLY 700 FI YFM7FGPW, Service Manual

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FI
FUEL INJECTION SYSTEM
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.
1
Engine trouble warning light
• 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.
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:
1
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
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)