Yamaha XSR 900 2022 Service Manual page 470

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P0606 Processor error. In-
ternal malfunction in
ECU. (When this
malfunction is de-
tected in the ECU,
the DTC might not
appear on the tool
display.)
P062F EEPROM DTC: an
error is detected
while reading or
writing on EE-
PROM.
P0638 YCC-T drive sys-
tem: malfunction de-
tected.
Probable cause of
malfunction
• Malfunction in
ECU (Processor
error).
• CO adjustment
value is not prop-
erly written.
• ISC learning value
is not properly writ-
ten.
• O feedback learn-
2
ing value is not
properly written.
• OBD memory val-
ue is not properly
written.
• Malfunction in
ECU.
• Defective coupler
between throttle
servo motor and
ECU.
• Open or short cir-
cuit in wire har-
ness between
throttle servo mo-
tor and ECU.
• Defective throttle
servo motor.
• Throttle servo mo-
tor is stuck (mech-
anism or motor).
• Malfunction in
ECU.
• Blown electric
throttle valve fuse.
9-64
Vehicle symptom
Engine cannot be
started.
Engine response is
poor.
Loss of engine pow-
er.
Increased exhaust
emissions.
Engine cannot be
started or is difficult
to start.
Engine idling speed
is unstable.
OBD memory value
is not correct.
Engine response is
poor.
Loss of engine pow-
er.
Engine idling speed
is unstable.
Fail-safe system
operation
Engine cannot be
started.
Ignition and injec-
tion are not carried
out.
Judgment for other
DTCs is not carried
out.
Load control is not
carried out. (Relay
unit, headlight relay,
and other relays are
all turned OFF.)
The CO adjustment
mode and diagnos-
tic mode cannot be
activated.
Output is restricted.
Cruise control fixed
to OFF.
CO adjustment val-
ue for the faulty cyl-
inder = 0 (default
value)
ISC learning values
= Default values.
OBD memory value
is initialized.
Initialization of O
2
feedback learning
value.
Cruise control fixed
to OFF.
O feedback is not
2
carried out.
YCC-T evacuation
is activated.
Output is restricted.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Quick shift system is
not carried out.
Cruise control fixed
to OFF.