Yamaha FZ1-N Service Manual page 367

The data representing the operating conditions of the sensor appears on the odometer/tripme-
ter/fuel reserve tripmeter LCD.
• Actuator operation
Set the engine stop switch to "
NOTE:
If the engine stop switch is set to "
9. Turn the main switch to "OFF" to cancel the diagnostic mode.
Fault code table
Fault
code Symptom
No.
• No normal signals are
received from the cylin-
der identification sensor
11
when the engine is
started or while the vehi-
cle is being driven.
No normal signals are
received from the crank-
12 shaft position sensor.
Intake air pressure sensor:
open or short circuit
13
detected.
Intake air pressure sensor:
14 faulty intake air pressure
sensor system.
Throttle position sensor:
open or short circuit
15 detected.
Throttle position sensor:
16
stuck
EXUP servo motor poten-
17 tion circuit: open or short
circuit detected.
EXUP servo motor is stuck. • Open or short circuit in sub wire harness.
18
Open circuit is detected in
the input line of ECU No.24
19
terminal is detected when
the start switch is pressed.
" to operate the actuator.
", set it to " ", and then set it to "
Probable cause of malfunction
• Open or short circuit in sub wire harness.
• Open or short circuit in wire harness.
• Defective cylinder identification sensor.
• Improperly installed sensor.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Defective crankshaft position sensor.
• Malfunction in pickup rotor.
• Improperly installed sensor.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Open or short circuit in sub wire harness.
• Defective intake air pressure sensor.
• Malfunction in ECU.
• Intake air pressure sensor hose is
detached, clogged, kinked, or pinched.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Open or short circuit in sub wire harness.
• Defective throttle position sensor.
• Improperly installed throttle position sensor.
• Malfunction in ECU.
• Stuck throttle position sensor.
• Malfunction in ECU.
• Open or short circuit in sub wire harness.
• Detective EXUP servo motor (potention cir-
cuit).
• Stuck EXUP servo motor (mechanism).
• Stuck EXUP servo motor (motor).
• Open circuit in wire harness (ECU Coupler).
• Malfunction in ECU.
8-43
FUEL INJECTION SYSTEM
" again.
Diagnostic
code No.
—
—
03
03
01
01
53
53
20