Yamaha YZF-R1, Service Manual

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SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
9-59
EAS33030
COMMUNICATION ERROR WITH THE METER
EAS33031
DIAGNOSTIC CODE: SENSOR OPERATION TABLE
DTC Item
Probable cause of
malfunction
Vehicle symptom
Fail-safe system op-
eration
U0155
(YDT)
Err (multi-
function
meter dis-
play) [U0155 (FI)] Multi-
function meter: sig-
nals cannot be trans-
mitted between the
ECU and the multi-
function meter.
[U0155 (SCU)] Abnor-
mal CAN communica-
tion (between meter
assembly and SCU) Communication be-
tween the ECU and
the meter is not possi-
ble
• Defective meter cou-
pler and ECU cou-
pler
• Open or short cir-
cuit in the wire har-
ness between the
meter and the ECU
• Defective meter
• Defective ECU
Defective meter dis-
play.
Traction control does
not work. MAP changeover:
State is fixed.
Traction control does
not work.
Meter switch input:
OFF is fixed.
QSS is not carried
out.
Engine brake man-
agement: control
mode is fixed.
Diagnostic
code No.
Item Tool display Procedure
D01 Throttle position sensor sig-
nal 1
• Fully closed position 11–21 Check with throttle valves ful-
ly closed.
• Fully open position 96–107 Check with throttle valves ful-
ly open.
D02 Atmospheric pressure Displays the atmospheric
pressure. Compare the actually mea-
sured atmospheric pressure
with the tool display value.
D03 Intake air pressure Displays the intake air pres-
sure. Operate the throttle while
pushing the “
” side of the
start/engine stop switch. (If
the display value changes,
the performance is OK.)
D05 Intake air temperature Displays the intake air tem-
perature. Compare the actually mea-
sured air temperature with
the tool display value.
D06 Coolant temperature When engine is cold: Dis-
plays temperature closer to
air temperature.
When engine is hot: Displays
current coolant temperature. Compare the actually mea-
sured coolant temperature
with the tool display value.
D07 Rear wheel vehicle speed
pulses Rear wheel speed pulse
0–999 Check that the number in-
creases when the rear wheel
is rotated. The number is cu-
mulative and does not reset
each time the wheel is
stopped.
D09 Fuel system voltage
(battery voltage) Fuel system voltage
Approximately 12.0 Set the start/engine stop
switch to “
”, and then com-
pare the actually measured
battery voltage with the tool
display value. (If the actually
measured battery voltage is
low, recharge the battery.)