Troubleshooting Chart - Yamaha 2002 TDM900 Service Manual

TROUBLE SHOOTING CHART
"Engine runs irregularly." or "Engine trouble warning light is illuminated."
* Engine trouble warning light may not be illuminated even if the engine runs irregularly.
When the engine trouble warning light is illumi-
nated
Checking the self-diagnostic fault code number:
Check the self-diagnostic fault code number dis-
played on the meter.
Specifying the malfunctioned system:
Specify the malfunctioned system by referring to
the Fail-safe actions table.
Presuming the cause:
Presume the malfunction cause by referring to the
Diagnostic monitoring code table.
Checking and repaining the presumed place of
malfunction.
Diagnostic
Monitoring codeNo.
YES
Check and repair in
accordance with the
"Troubleshooting de-
tails", monitoring the
operation of sensor
and actuator in the
Diagnostic monitoring
mode (Refer to "SEN-
SOR OPERATION
TABLE/ACTUATOR
OPERATION TABLE"
in chapter 7.).
ECU reinstatement action:
Perform ECU reinstatement action referring to the
reinstatement method in the troubleshooting details.
Checking the meter display:
Check whether the self-diagnostic fault code num-
ber is shown after turning the main switch OFF
once, and then turning it back ON.
Erasing the melfunction history:*
Malfunction history will be stored even if the main
switch is turned OFF. To erase the malfunction his-
tory, it is required to operate to erase the malfunc-
tion history in the Diagnostic monitoring mode.
(Refer to "SENSOR OPERATION TABLE" in chap-
ter 7.)
FUEL INJECTION SYSTEM
Diagnostic
Monitoring code No.
NONE
Check and repair in
accordance with the
trouble shooting de-
tails.
Not displayed
Repair Completion
When the engine trouble warning light is not illumi-
nated
Inspecting the sensor actuator:Check the opera-
tion of following sensors and actuators in the Diag-
nostic monitoring mode (Refer to "SENSOR OP-
ERATION TABLE/ ACTUATOR
TABLE" in chapter 7.)
01: Throttle position sensor (throttle angle)
30: Ignition coil #1
31: Ignition coil #2
36: Injector #1
37: Injector #2
48: Al system solenoid
49: In take solenoid
OK
Malfunction of en-
gine unit
Check and repair
the inner parts of
engine referring to
the engine edition
of Chapter 5.
OK
Checking the engine condition.
Displayed
again.
* Operation when the engine trouble warning light is illu-
minated.
7-5
FI
OPERATION
NG
Defective sensor
or actuator
Check and repair
the corresponding
sensor or actuator.
NG OK
OK