Substitute Characteristics Operation Control (Fail-Safe Action) - Yamaha FJR1300(S) Supplementary Service Manual

SUBSTITUTE CHARACTERISTICS OPERATION CONTROL (FAIL-SAFE ACTION)

If the ECU detects an abnormal signal from a sensor while the motorcycle is being driven, the ECU
illuminates the engine trouble warning light and provides the engine with substitute characteristic
operation instructions that are appropriate for the type of the malfunction.
When an abnormal signal is received from a sensor, the ECU processes the specified values that
are programmed for every sensor, in order to provide the engine with substitute characteristics
operation instructions that enable the engine to continue to operate (or to stop its operation,
depending on circumstances).
The ECU takes fail-safe actions in two ways: one in which the sensor output is set to a prescribed
value, and the other in which the ECU directly operates an actuator. Details on the fail-safe actions
are given in the table below.
Table of substitute characteristic operation control by self-diagnostic fault code
Code No. Item
Cylinder identification
11 sensor
Crankshaft position sen-
12
sor
Intake air pressure sensor
13
(open or short circuit)
14
(pipe system)
Throttle position sensor
15
(open or short circuit)
16
(stuck)
Broken or disconnected
19
black/red lead of the ECU.
Coolant temperature sen-
21
sor
Intake air temperature
22
sensor
O sensor
2
(inactive)
24
(compensation stuck to
31
upper limit)
32
(compensation stuck to
lower limit)
Faulty ignition
33
34
Lean angle cut-off switch
30
(latch up detected)
41
(open or short circuit)
Speed sensor, neutral
42
switch
Fuel system voltage
43
(monitor voltage)
Error in writing the
44 amount of CO adjust-
ment on EEPROM
ECU internal malfunction
50
(memory check error)
FUEL INJECTION SYSTEM
Fail-safe action
Continues to operate the engine based on the results
of the cylinder identification that existed up to that
point.
• Stops the engine (by stopping the injection and
ignition).
• Fixes the intake air pressure to 760 mmHg.
• Fixes the throttle position sensor to fully open.
-- (No start)
• Fixes the coolant temperature to 60 °C.
• Fixes the intake temperature to 20 °C.
--
• Fuel is cut off only to the cylinder in which a mal-
function is detected.
• Turns OFF the fuel injection system relay of the fuel
system.
• Fixes the gear to the top gear.
• Fixes the battery voltage to 12 V.
--
--
– 16 –
FI
Able/unable to Able/unable to
start drive
Able Able
Unable Unable
Able Able
Able Able
Unable Unable
Able Able
Able Able
Able Able
Able Able
(depending on (depending on
the number of the number of
faulty cylinders) faulty cylinders)
Unable Unable
Able Able
Able Able
Able Able
Unable Unable