Checking The Fuel Injector; Checking The Throttle Body; Installing The Throttle Body Assembly - Yamaha MT-03 Service Manual

EAS00912

CHECKING THE FUEL INJECTOR

1. Check:
• Fuel injector
Damage Replace.
2. Check:
• Fuel injector resistance
a. Disconnect the injection wire harness cou-
pler from the fuel injector.
b. Connect the pocket tester (Ω x 1) to the fuel
injector terminal as shown.
• Positive tester probe
• Negative tester probe
1 2
c. Measure the fuel injector resistance.
Out of specification
jector.
Fuel injector resistance
12 Ω at 20 °C (68 °F)
EAS00913

CHECKING THE THROTTLE BODY

1. Check:
• Throttle body
Cracks/damage
2. Check:
• Fuel passages
Obstructions Clean.
a. Wash the throttle body in a petroleum-based
solvent.
CAUTION:
Do not use any caustic carburetor cleaning
solution.
Red/Black "1"
Red/Blue "2"
R/L R/B
Replace the fuel in-
Replace the throttle body.
THROTTLE BODY ASSEMBLY
b. Blow out all of the passages with com-
pressed air.
INSTALLING THE THROTTLE BODY
ASSEMBLY
1. Install:
• Throttle body joint clamps
NOTE:
Align the projection "a" on the throttle body joint
with the slot "b" in the throttle body joint clamp.
a
2. Install:
• Throttle body joint
NOTE:
Align the projection "a" on the cylinder head
with the slot "b" in the throttle body joint.
7-7
b
b
a
a
b