Yamaha Fz6n Manual

6-14
WATER PUMPCOOL
NOTE:
CAUTION:
NOTE:
EAS00473
CHECKING THE WATER PUMP
1. Check:

water pump housing 
1

water pump cover 2

impeller 3

rubber damper 4

rubber damper holder 5

water pump seals

oil seal 
Cracks / damage / wear 
 Replace.
2. Check:

bearing 
Rough movement 
 Replace.
3. Check:

water pump outlet hose

radiator outlet hose
Cracks / damage / wear 
 Replace.
EAS00475
ASSEMBLING THE WATER PUMP
1. Install:

bearing

oil seal 
New 1
(into the water pump housing 2)

Before installing the...

6-15
WATER PUMPCOOL
NOTE:
CAUTION:
10 Nm (1.0 m
kg, 7.2 ft
lb)
Mechanical seal installer
90890-04078, YM-33221 
4
Middle driven shaft bearing driver
90890-04058, YM-04058 
5
Quick Gasket
ACC-11001-05-01
Yamaha bond #1215
90890-85505
APush down.
3. Install:

rubber damper 
New 1

rubber damper holder New 2
Before installing the rubber damper, apply tap
water or coolant onto its outer surface.
4. Measure:

impeller shaft tilt
Out of specification 
 Repeat steps (3) and
(4).
Make sure the rubber damper and...

6-16
WATER PUMPCOOL
10 Nm (1.0 m
kg, 7.2 ft
lb)
NOTE:
NOTE: INSTALLING THE WATER PUMP
1. Install:

O-ring 
New

copper washer 
New

water pump assembly
Align the projection 
a at the oil pump shaft and
water pump shaft groove 
b.
2. Install:

water pump outlet hose 
1

radiator outlet hose 2

Install the radiator outlet hose with white a
mark positioned outside.

Install the hose clamp with its screw head
pointed to the inner side.
3. Fill:

cooling system
(with the specified amount of the recom-
mended...

7-1
FUEL INJECTION SYSTEMFI
1Ignition coil
2Air filter case
3Intake air temperature sensor
4Fuel delivery hose
5Fuel tank
6Fuel pump
7Intake air pressure sensor
8Throttle position sensor
9Fuel injector
10Catalytic converter
11Crankshaft position sensor
12Coolant temperature sensor
13Spark plug
14Pressure regulator
15Battery
16ECU
17Fuel injection system relay
18Engine trouble warning light
19Lean angle cut-off switch
FUEL INJECTION SYSTEM
FUEL INJECTION SYSTEM 

7-2
7
FUEL INJECTION SYSTEMFI
WIRING DIAGRAM
1Main switch
5Fuse (fuel injection)
6Fuse (main)
9Battery
10Starting circuit cut-off relay
11Sidestand switch
12Neutral switch
13Fuel pump
14Throttle position sensor
15Intake air pressure sensor
16Lean angle cut-off switch
17Crankshaft position sensor
18Intake air temperature sensor
19Coolant temperature sensor
20ECU
21Cylinder #1-injector
22Cylinder #2-injector
23Cylinder #3-injector
24Cylinder #4-injector
26Speed sensor
27Ignition coil #1 and #4
28Ignition...

7-3
41: Lean angle cut-off switch
(open or short circuit)
50: ECU internal malfunction
(memory check error)
FUEL INJECTION SYSTEMFI
EAS00899
ECU’S SELF-DIAGNOSTIC FUNCTION
The ECU is equipped with a self-diagnostic function in order to ensure that the engine control system is
operating normally. If this function detects a malfunction in the system, it immediately operates the en-
gine under substitute characteristics and illuminates the engine trouble warning light to alert the rider
that a malfunction...

7-4
FUEL INJECTION SYSTEMFI
EAS00902
ALTERNATE INSTRUCTIONS OPERATION CONTROL (FAIL-SAFE ACTION)
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU illumi-
nates the engine trouble warning light and provides the engine with alternate operating instructions
that are appropriate for the type of malfunction.
When an abnormal signal is received from a sensor, the ECU processes the specified values that are
programmed for each sensor in order to provide the engine...

7-5
FUEL INJECTION SYSTEMFI
Communication error with the meter
Er-1ECU internal malfunction
(output signal error)No signals are received from
the ECU.–UnableUnable
Er-2ECU internal malfunction
(output signal error)No signals are received from
the ECU within the specified
duration.
–UnableUnable
Er-3ECU internal malfunction
(output signal error)Data from the ECU cannot be
received correctly.–UnableUnable
Er-4ECU internal malfunction
(input signal error)Non-registered data has been
received from the...

7-6
Engine operation is not normal or the engine trouble warning light is on.
* Engine trouble warning light may not come on even if the engine operation is not normal.
The engine trouble warning light comes on.
Check the fault code number displayed on the me-
ter.
Identify the system with the malfunction. (Refer to
the “FAIL-SAFE ACTIONS TABLE”.)
Identify the probable cause of malfunction. (Refer
to the “Fault code table”.)
Check and repair the probable case of malfunc-
tion.
Fault code No. YES Fault...

7-7
FUEL INJECTION SYSTEMFI
NOTE:
NOTE:
EAS00905
DIAGNOSTIC MODE
It is possible to monitor the sensor output data
or check the activation of actuators without con-
necting the measurement equipment by simply
switching the meter indication from the normal
mode to the diagnostic monitoring mode.
Setting the diagnostic mode
1. Turn the main switch to “OFF” and set the en-
gine stop switch to “OFF”.
2. Disconnect the wire harness coupler from
the fuel pump.
3. Simultaneously press and hold the “SE-
LECT” and...