Yamaha FJR13AG Service Manual page 756

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault code
Item
No.
P0601 Faulty ECU memory.
(When this malfunc-
tion is detected in the
ECU, the fault code
number might not ap-
pear on the tool dis-
play.)
P0606 ECU internal malfunc-
tion. (When this mal-
function is detected in
the ECU, the fault
code number might
not appear on the tool
display.)
P062F EEPROM fault code
number (an error is
detected while read-
ing or writing on EE-
PROM)
P0638 YCC-T drive system
(malfunction detect-
ed)
Probable cause of
malfunction
• Malfunction in ECU. Engine cannot be
started.
• Malfunction in ECU. Engine cannot be
started.
Engine response is
poor.
Loss of engine power.
• CO adjustment val- Increased exhaust
ue is not properly emissions.
written. Engine cannot be
• ISC learning value is started or is difficult to
not properly written. start.
• OBD memory value Engine idling speed is
is not properly writ- unstable.
ten. OBD memory value is
• Malfunction in ECU. not correct.
• Defective coupler Engine response is
between throttle ser- poor.
vo motor and ECU. Loss of engine power.
• Open or short cir- Engine idling speed is
cuit in wire harness unstable.
between throttle ser-
vo motor and ECU.
• Defective throttle
servo motor.
• Stuck throttle servo
motor (mechanism
or motor).
• Malfunction in ECU.
• Blown electronic
throttle valve fuse.
9-11
Fail-safe system op-
Vehicle symptom
Engine cannot be
started.
Engine cannot be
started.
Ignition and injection
are not carried out.
Judgment for other
fault codes is not car-
ried out.
Load control is not
carried out. (The relay
unit, headlight relay,
and other relays are
all turned off.)
The CO adjustment
mode and diagnostic
mode cannot be acti-
vated.
Output is restricted.
Cruise control system
cannot be operated.
CO adjustment value
for the faulty cylinder
= 0 (default value)
ISC learning values =
Default values
OBD memory value is
initialized.
O
2
value is initialized.
Cruise control system
cannot be operated.
O
2
carried out.
YCC-T system does
not operate.
Output is restricted.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Cruise control system
cannot be operated.
(ECU)
eration
feedback learning
feedback is not