Checking The Injectors (Before Removing); Removing The Injectors; Checking The Injectors; Checking The Throttle Bodies - Yamaha XSR MTM690 2016 Service Manual

EAS30475
CHECKING THE INJECTORS (BEFORE
REMOVING)
1. Check:
• Injectors
Use the diagnostic code numbers "36–37".
Refer to "SELF-DIAGNOSTIC FUNCTION
AND DIAGNOSTIC CODE TABLE" on page
9-5.
EAS30476

REMOVING THE INJECTORS

EWA17330
WARNING
• Check the injectors in a well-ventilated area
free of combustible materials. Make sure
that there is no smoking or use of electric
tools in the vicinity of the injectors.
• Be careful when disconnecting the fuel
hose. Any remaining pressure in the fuel
hose may cause the fuel to spray out. Place
a container or rag under the hose to catch
any fuel that spills. Always clean up any
spilt fuel immediately.
• Turn the main switch to "OFF" and discon-
nect the negative battery lead from the bat-
tery terminal before removing the injectors.
1. Remove:
• Fuel rail "1"
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Remove the fuel rail bolts "2" as shown.
▲ ▲▲▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
EAS30477

CHECKING THE INJECTORS

1. Check:
• Injectors
Obstruction → Replace and check the fuel
pump/fuel supply system.
Deposit → Replace.
Damage → Replace.
2. Check:
• Injector resistance
Refer to "CHECKING THE FUEL INJEC-
TORS" on page 8-171.
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
1
2
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
EAS30479

CHECKING THE THROTTLE BODIES

TIP
Before checking the throttle bodies, check the
following items:
• Valve clearance
• Spark plugs
• Air filter element
• Throttle body joints
• Fuel hose
• Exhaust system
• Cylinder head breather hose
• Vacuum hoses
EWA17850
WARNING
If the throttle bodies are subjected to strong
shocks or dropped during checking, replace
them.
1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle bod-
ies.
EAS31143
CLEANING THE ISC (IDLE SPEED
CONTROL) VALVE
1. Remove the throttle bodies from the vehicle.
TIP
▼▼▼
Before removing the throttle bodies, disconnect
the throttle cables and couplers.
Cleaning the throttle bodies
1. Clean:
• Throttle bodies
ECA20910
NOTICE
• Observe the following precautions; other-
wise, the throttle bodies may not operate
properly.
• Do not open the throttle valves quickly.
▲▲▲
• Do not subject the throttle bodies to exces-
sive force.
• Wash the throttle bodies in a petroleum-
based solvent.
• Do not use any caustic carburetor cleaning
solution.
• Do not apply cleaning solvent directly to
any plastic parts, sensors, or seals.
• Do not directly push the throttle valves to
open them.
7-10
THROTTLE BODIES