Yamaha R1 2004 ServiceManual

7-7
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 probable cause of malfunction. (Refer
to the “Diagnostic fault code table”.)
Check and repair the probable case of malfunc-
tion.
Fault code No.
appearFault code No.
disappear
Check and repair.
(Refer to “TROU-
BLESHOOTING DE-...

7-8
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...

7-9
FUEL INJECTION SYSTEMFI
NOTE: 7. Verify the operation of the sensor or actuator.

Sensor operation
The data representing the operating condi-
tions of the sensor appears on the trip LCD.

Actuator operation
Set the engine stop switch to “ON” to operate
the actuator.
* If the engine stop switch is set to “ON”, set it
to “OFF”, and then set it to “ON” again.
8. Turn the main switch to “OFF” to cancel the
the diagnostic mode.
To perform a reliable diagnosis, make sure to
turn “OFF” the power supply...

7-10
FUEL INJECTION SYSTEMFI
Diagnostic fault code table
Fault
code No.SymptomProbable cause of malfunctionDiagnostic
code
11
No normal signals are received from
the cylinder identification sensor.
Open or short circuit in wiring sub lead.

Open or short circuit in wiring harness.

Defective cylinder identification sensor.

Malfunction in ECU.

Improperly installed sensor.
—
12
No normal signals are received from
the crankshaft position sensor.
Open or short circuit in wiring harness.

Defective...

7-11
FUEL INJECTION SYSTEMFI
Fault
code No.SymptomProbable cause of malfunctionDiagnostic
code
34
Open circuit is detected in the primary
lead of the ignition coil (#2).
Open or short circuit in wiring harness.

Malfunction in ignition coil.

Malfunction in ECU.

Malfunction in a component of ignition cut-off circuit system.
31
35
Open circuit is detected in the primary
lead of the ignition coil (#3).
Open or short circuit in wiring harness.

Malfunction in ignition coil.

Malfunction in ECU....

7-12
FUEL INJECTION SYSTEMFI
NOTE: Diagnostic mode table
Switch the meter display from the regular mode to the diagnosis mode. To switch the display, refer to
“DIAGNOSTIC MODE”.

Check the intake air temperature and coolant temperature as close as possible to the intake air tem-
perature sensor and the coolant temperature sensor respectively.

If it is not possible to check it with an atmospheric pressure gauge, judge it by using 101.3 kPa as the
standard.

If it is not possible to check the intake air...

7-13
FUEL INJECTION SYSTEMFI
Diagnostic
codeItemDescription of actionData displayed on meter
(reference value)
32
Ignition coil #3After the engine stop switch has been turned from OFF to
ON, it actuates ignition coil #3 for five times every second
and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check that spark is generated,
5 times with the engine stop
switch ON.
33
Ignition coil #4After the...

7-14
FUEL INJECTION SYSTEMFI
Diagnostic
codeItemDescription of actionData displayed on meter
(reference value)
52
Headlight relay 1After the engine stop switch has been turned from OFF to
ON, it actuates the headlight relay five times every
5 seconds and illuminates the engine trouble warning light.
(ON 2 seconds, OFF 3 seconds)
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check the headlight relay
operating sound 5 times with the
engine stop switch ON.
(At that time, the...

7-15
FUEL INJECTION SYSTEMFI
Cylinder identification sensor
output voltage
When sensor is on
4.8 V or more
When sensor is off
0.8 V or less Tester positive probe 
 white / black
Tester negative probe 
 black / blue
1
2
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Carry out check
and maintenance on items or components that could be a cause of malfunction in accordance with the
order.
When the check and maintenance of malfunctioned part is...

7-16
Crankshaft position sensor
resistance
336 
 504 Ω at 20C (68F)
(between gray and black) Tester positive probe 
 gray 
Tester negative probe 
 black
1
2
12
FUEL INJECTION SYSTEMFI
Fault code No.12SymptomNo normal signals are received from the crankshaft position sensor.
Used diagnostic code No. – –
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Installed condition of sensorCheck the installed area for looseness or
pinching.Reinstated by...