Yamaha 2008 Tenere, Service Manual

Page: 304 / 399

7-20
FUEL INJECTION SYSTEM
EAS27380
SELF-DIAGNOSTIC FUNCTION TABLE
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU illu-
minates the engine trouble warning light and provides the engine with alternate operating instruc-
tions 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.
FAIL-SAFE ACTION TABLE
Self-diagnostic function
Fault
Item Symptom Fail-safe action Startability Driveability
code No.
12
Crankshaft position No normal signals are
— No No
sensor received from the sensor.
Intake air pressure Open or short circuit is • Fixes the intake air pres-
13 sensor (open or short detected. sure to 101 kPa Yes Yes
circuit) (760 mmHg, 29.9 inHg).
Intake air pressure Intake air pressure sensor • Fixes the intake air pres-
sensor hose is clogged or discon- sure to 101 kPa
14 nected, causing the constant (760 mmHg, 29.9 inHg). Yes Yes
application of atmospheric
pressure to the sensor.
15
Throttle position sensor Open or short circuit is • Fixes the throttle position
Yes Yes
(open or short circuit) detected. sensor to fully open.
16
Throttle position The throttle position sensor • Fixes the throttle position
Yes Yes
sensor (stuck) is detected stuck. sensor to fully open.
Broken or discon- Open circuit in the input line
19 nected blue/black (blue/black) of the ECU is — No No
lead of the ECU detected.
21
Coolant temperature Open or short circuit is • Fixes the coolant tempe-
Yes Yes
sensor detected. rature to 80 °C (176 °F).
22
Intake air temperature Open or short circuit is • Fixes the intake air tem-
Yes Yes
sensor detected. perature to 20 °C (68 °F).
24 O
2
sensor
No normal signal is received
from the O
2
sensor.
— Yes Yes
Lean angle cut-off The motorcycle has
30 switch (latch up overturned. — No No
detected)
Open circuit is detected in
33 Faulty ignition the primary lead of the — No No
ignition coil.
Lean angle cut-off Open or short circuit is
41 switch (open or detected. — No No
short circuit)
Speed sensor, No normal signals are • Fixes the gear to the top
neutral switch received from the speed gear.
42 sensor or an open or short Yes Yes
circuit is detected in the
neutral switch.
Fuel system voltage The ECU is unable to • Fixes the battery voltage
43
(monitor voltage) monitor the battery voltage to 12 V. Yes Yes
(open circuit in the wire to
the ECU).
Error in writing the An error is detected while
44
amount of CO reading or writing on
— Yes Yes
adjustment on EEPROM (CO adjustment
EEPROM value).