Yamaha TMAX XP530E-A 2017 Service Manual page 652

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault
Item
code No.
P056C Cruise control cancel
switch (open or short
circuit detected)
P0601 Faulty ECU memory.
(When this malfunc-
tion is detected in the
ECU, the fault code
number might not
appear on the tool
display.)
P0606 Internal malfunction in
ECU (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
EEPROM)
P0638 YCC-T drive system:
open or short circuit.
YCC-T drive system:
malfunction detected.
Probable cause of
malfunction
• Open or short cir-
cuit in wire harness.
• Defective cruise
control setting
switch.
• Malfunction in ECU.
• Malfunction in ECU.
• Malfunction in ECU.
• CO adjustment
value is not properly
written.
• ISC learning value is
not properly written.
• OBD memory value
is not properly writ-
ten.
• Malfunction in ECU.
• Defective coupler
between throttle
servo motor and
ECU.
• Open or short cir-
cuit in wire harness
between throttle
servo motor and
ECU.
• Defective throttle
servo motor.
• Throttle servo motor
is stuck (mecha-
nism or motor).
• Malfunction in ECU.
• Blown electric throt-
tle valve fuse.
9-9
Vehicle symptom
Cruise control system
cannot be operated.
Engine cannot be
started.
Engine cannot be
started.
Engine response is
poor.
Loss of engine power.
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 power.
Engine idling speed is
unstable.
(ECU)
Fail-safe system
operation
Cruise control system
cannot be operated.
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 fuel
injection system relay,
headlight relay (dim-
mer), 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.
Initialization of O
2
feedback learning
value.
Cruise control system
cannot be operated.
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.
Cruise control system
cannot be operated.