Yamaha YZ250F(E), Owner'S Service Manual

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LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
9-4
EAS1SM1364
LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
LIST OF DIAGNOSTIC CODES
COMMUNICATION ERROR WITH YAMAHA DIAGNOSTIC TOOL
Fault
code
ITEM Page
12 Crankshaft position sensor: no normal signals are received from the
crankshaft position sensor.
8-14
13 Intake air pressure sensor: open or short circuit detected. 8-15
14 Intake air pressure sensor: hose system malfunction (clogged or de-
tached hose)
8-16
15 Throttle position sensor: open or short circuit detected. 8-17
16 Throttle position sensor: stuck throttle position sensor is detected. 8-19
21 Coolant temperature sensor: open or short circuit detected. 8-20
22 Intake air temperature sensor: open or short circuit detected. 8-21
30 The vehicle has overturned. 8-22
33 Ignition coil: open or short circuit detected in the primary lead of the
ignition coil.
8-23
39 Injector: open or short circuit detected. 8-24
41 ECU: built-in lean angle sensor malfunction 8-25
44 EEPROM fault code No.: an error is detected while reading or writing
on EEPROM.
8-26
46 Vehicle system power supply: normal voltage is not supplied to the
ECU.
8-27
50 ECU: faulty ECU memory 8-28
Fault
code
ITEM Page
Waiting
for con-
nection
No communication signal is received from the ECU.
8-29
Er-2 Signals from the ECU cannot be received within the specified period
of time.
8-29
Er-3 Data from the ECU cannot be received correctly. 8-30
Er-4 Registered data cannot be received from the Yamaha diagnostic tool. 8-31