Yamaha YZF-R25, Service Manual

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SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
9-5
EAS20116
SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
EAS31118
SELF-DIAGNOSTIC FUNCTION TABLE
TIP
For details of the fault code, refer to “TROUBLESHOOTING METHOD” on page 8-33.
EAS31373
COMMUNICATION ERROR WITH THE METER OR YAMAHA DIAGNOSTIC TOOL
TIP
For details of the fault code, refer to “TROUBLESHOOTING METHOD” on page 8-33.
Fault code
No.
Item
12
Crankshaft position sensor: no normal signals are received from the crankshaft position sen-
sor.
13 Intake air pressure sensor: open or short circuit detected.
14 Intake air pressure sensor: hose system malfunction (clogged or detached hose).
15 Throttle position sensor: open or short circuit detected.
16
Throttle position sensor: stuck throttle position sensor is detected. (signal from throttle position
sensor will not change)
19
Black/red lead of the ECU: a break or disconnection of the black/red lead of the ECU is detect-
ed.
21 Coolant temperature sensor: open or short circuit detected.
22 Intake air temperature sensor: open or short circuit detected.
24
O
2
sensor: no normal signals are received from the O
2
sensor.
30 Latch up detected.
33
Cylinder-#1 ignition coil: open or short circuit detected in the primary lead of the cylinder-#1 ig-
nition coil.
34
Cylinder-#2 ignition coil: open or short circuit detected in the primary lead of the cylinder-#2 ig-
nition coil.
39 Fuel injector: open or short circuit detected.
41 Lean angle sensor: open or short circuit detected.
42
Speed sensor: no normal signals are received from the speed sensor.
Gear position switch: open or short circuit is detected.
Clutch switch: open or short circuit is detected.
43 Fuel system voltage: incorrect voltage supplied to the fuel injector and fuel pump.
44 EEPROM fault code number: an error is detected while reading or writing on EEPROM.
46 Charging voltage is abnormal.
50
Faulty ECU memory. (When this malfunction is detected in the ECU, the fault code number
might not appear on the meter display.)
70 Engine idling stop
Fault code No. Item
Er-1 (fault code display)
ECU (engine control unit) internal malfunction (output signal error): sig-
nals cannot be transmitted between the ECU and the multi-function
meter.
Waiting for connection (Yamaha
diagnostic tool) ECU (engine control unit) internal malfunction (output signal error): Sig-
nals cannot be transmitted between the ECU and Yamaha diagnostic tool.