Troubleshooting Method - Yamaha XV19SW Service Manual

Fault
Item
code No.
70 Engine idling stop
Communication error with the meter
Fault
Item
code No.
ECU internal malfunc-
Er-1 tion
(output signal error)
ECU internal malfunc-
Er-2 tion
(output signal error)
ECU internal malfunc-
Er-3 tion
(output signal error)
ECU internal malfunc-
Er-4 tion
(input signal error)
EAS27400

TROUBLESHOOTING METHOD

The engine operation is not normal and the
engine trouble warning light comes on.
1. Check:
• Fault code number
M MMM M MMM M M MMM M M MMM M
a. Check the fault code number displayed on
the meter.
b. Identify the faulty system with the fault code.
Refer to "Self-Diagnostic Function table".
c. Identify the probable cause of the malfunc-
tion. Refer to "Diagnostic code table".
L LLL L LLL L L LLL L L LLL L
Symptom
Engine has been left idling. (The
ECU automatically stops the en-
gine after 20 minutes if it is left
idling.)
Symptom
No signals are received from the
ECU.
No signals are received from the
ECU within the specified duration.
Data from the ECU cannot be re-
ceived correctly.
Non-registered data has been re-
ceived from the meter.
M MMM M M MMM M MMM
L LLL L L LLL L LLL
7-32
FUEL INJECTION SYSTEM
Able / un-
able to start
Able
Able / un-
able to start
Unable
Unable
Unable
Unable
2. Check and repair the probable cause of mal-
function.
Fault code No.
Check and repair.
Refer to "TROUBLE-
SHOOTING DE-
TAILS" on page 7-40.
Monitor the opera-
tion of the sensors
and actuators in the
diagnostic mode. Re-
fer to "Sensor opera-
tion table" and
"Actuator operation
table".
3. Perform ECU reinstatement action.
Refer to "Reinstatement method" of table in
"TROUBLESHOOTING DETAILS".
4. Turn the main switch to "OFF" and back to
"ON", then check that no fault code number is
displayed.
NOTE:
If fault codes are displayed, repeat steps (1) to
(4) until no fault code number is displayed.
Able / un-
able to
drive
Able
Able / un-
able to
drive
Unable
Unable
Unable
Unable
No fault code No.
Check and repair.
Refer to "Self-Diag-
nostic Function ta-
ble".