Diag Code List - Yamaha MX775 Service Manual

FUEL INJECTION SYSTEM

DIAG CODE LIST

1
DIAG Tool Diag
Mode Code
2
3
MAP
4
5
IAT
6
7
8
ET
9
DIAG
10
TPS
O
RPM
HOUR
What to dis-
Item
Manifold
Manifold
Absolute
Absolute
Pressure sen-
Pressure
sor
Intake Air
Intake Air
Temperature
Temperature
Sensor
Engine Tem-
Engine Tem-
perature Sen-
perature
sor
Throttle Posi- Throttle Valve
tion Sensor position
Oxygen den-
O sensor
2 2
Engine rpm Engine rpm
Engine run Engine run
hour
Unit
play
• Compare the sensor output value with
atmospheric absolute pressure (Exam-
ple: 14.7 psi) with engine stopped.
psi • Confirm the sensor output value on dis-
play changes while engine cranking.
(Manifold Absolute pressure changes
during cranking.)
• Compare the sensor output value with
ambient air temperature. (with engine
cold)
F
• Confirm the sensor output value on dis-
play changes with heating or cooling sen-
sor alone.
• Compare the sensor output value with
ambient air temperature. (with engine
cold)
F
• Confirm the sensor output value on dis-
play changes with heating or cooling sen-
sor alone.
• Sensor resistance: 9.0–11.0 k (25 C)
• Confirm throttle position on FI diagnositc
tool display when throttle valve is fully
opened.
MX825V: 95–100 %
MX800V: 67–77 %
MX775V: 54–64 %
% • Confirm throttle position on FI diagnositc
tool display when throttle valve is fully
closed.
MX825/800/775V: 0–5 %
• Confirm throttle position on display
changes smoothly with throttle valve
open and close.
V
sity
rpm
hr
hour
5-11
How to diagnosis
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