Yamaha YZF-R1 2020 Service Manual page 563

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
Abnormality in-
—
side SCU
Steering damper
stepping motor
(manufactured by
Öhlins: optional):
—
open circuit or
short-circuit de-
tected.
EAS33030
COMMUNICATION ERROR WITH THE METER
DTC
U0155 [U0155 (FI)] Multi-
(YDT) function meter: sig-
nals cannot be trans-
Err (multi-
mitted between the
function
meter dis- ECU and the multi-
play) function meter.
[U0155 (SCU)] Abnor-
mal CAN communica-
tion (between meter
assembly and SCU)
Probable cause of
malfunction
• Malfunction in SCU.
• Defective connec-
tion of stepping mo-
tor and SCU
couplers.
• Defective connec-
tion of sub-wire har-
ness coupler.
• Short circuit in wire
harness or wire har-
ness continuity.
• Defective stepping
motor.
• Malfunction in SCU.
Probable cause of
Item
malfunction
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
Vehicle symptom
• ERS adjustments can-
not be performed.
• The "Err" and ERS
icons are displayed on
the meter display.
• ERS adjustments can-
not be performed.
• The damping preset
value is fixed at the cur-
rent value.
• The auxiliary system
warning light comes on
on the meter and the
steering damper warn-
ing icon is displayed on
the meter display.
Vehicle symptom
Defective meter dis-
play.
Traction control does
not work.
9-68
Fail-safe system operation
—
—
Fail-safe system op-
eration
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.