Section 04 ENGINE MANAGEMENT SYSTEM
Subsection 03 (MONITORING SYSTEM/FAULT CODES)
MONITORING SYSTEM/FAULT CODES
MONITORING SYSTEM
The EMS features a monitoring system that self-
diagnose its electronic components (control mod-
ules, sensors and actuators) to ascertain they are
not faulty or defective. This mode comes active
when ignition key is turned on.
NOTE:
Some components need the engine to be
running so that they can be monitored (fuel injec-
tors for example).
When a malfunction is currently detected, the
ECM:
– Sets an active fault code.
– Adapts the proper protection strategy according
to the failure.
– Sends out signals to the multifunction gauge to
inform the rider of a particular condition.
When a minor fault occurs, the check engine pi-
lot lamp will turn on. The fault may disappear
automatically when the ignition key is turned off
and kept off until lights turn off in multifunction
speedometer, then turned back on.
When an important fault occurs, LIMP MODE will
be displayed in the multi- function speedometer
and check engine light will flash.
In the following situations, engine RPM will be
limited.
CONDITION
MAX.
ALLOWED RPM
High engine temperature
4000
Low battery voltage
Low oil pressure
Safety fuel cut-off
(TPS or internal memory error)
5000
High battery voltage
7000
The following components or functions are moni-
tored.
COMPONENT
EMS (TPS, CPS, MAPTS, CTS, OPS, IACV,
GBPS, ignition coil and fuel injector)
Battery voltage
Engine RPM
Brake monitoring
CAN
ECM
Starter solenoid
Fuel pump
Cooling fan
Relays
FAULT CODES
Verify if the check engine pilot lamp is ON or
blinks. If so, look for fault codes to diagnose the
trouble.
The fault codes recorded in the ECM can be
checked by using the software B.U.D.S. (refer to
COMMUNICATION TOOLS/BUDS SOFTWARE
section) or on the multi-function gauge.
Stored fault codes are kept in the ECM even if the
battery is disconnected.
For more information pertaining to the fault codes
(state, count, first, etc.)
and report, refer to
B.U.D.S. online help.
When using the service action suggested in the
Fault
section of B.U.D.S., the circuits are referred
to as ECM pins A1-1, which means the wiring be-
tween the ECM pin A1 and the sensor pin 1.
IMPORTANT:
After a problem has been solved,
ensure to clear the fault(s) in the ECM using the
B.U.D.S. software. This will properly reset the ap-
propriate counter(s) and will also record that the
problem has been fixed in the ECM memory.
NOTE:
Many fault codes at the same time is likely
to be burnt fuse(s) or a faulty relay.
How to Read Fault Codes Using
B.U.D.S. Software
Refer to
COMMUNICATION TOOLS/B.U.D.S.
SOFTWARE
section.
vmr2008-134
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