Yamaha YZ 2018 Series, Owner'S Service Manual

Page: 378 / 402

LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
9-5
EASB29B385
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.
8-29
13 Intake air pressure sensor: open or short circuit detected. 8-30
14 Intake air pressure sensor: hose system malfunction (clogged or de-
tached hose)
8-31
15 Throttle position sensor: open or short circuit detected. 8-32
16 Throttle position sensor: stuck throttle position sensor is detected. 8-34
21 Coolant temperature sensor: open or short circuit detected. 8-35
22 Intake air temperature sensor: open or short circuit detected. 8-36
30 Latch up detected. 8-38
33 Ignition coil: open or short circuit detected in the primary lead of the
ignition coil.
8-38
39 Injector: open or short circuit detected. 8-40
41 Lean angle sensor: open or short circuit detected. 8-41
43 Fuel system voltage: incorrect voltage supplied to the fuel injector and
fuel pump.
8-42
44 EEPROM fault code number: an error is detected while reading or
writing on EEPROM.
8-43
46 Charging voltage is abnormal. 8-44
50 Faulty ECU memory. 8-44
Fault
code
Item Page
Waiting
for con-
nection No communication signal is received from the ECU.
8-45
Er-2 Signals from the ECU cannot be received within the specified period
of time.
8-46
Er-3 Data from the ECU cannot be received correctly. 8-47
Er-4 Registered data cannot be received from the Yamaha diagnostic tool. 8-48