Yamaha PZ50W Service Manual page 271

Diagnostic mode table
Switch the meter display from the regular mode to the diagnostic mode. To switch the display, refer to "DIAG-
NOSTIC MODE".
NOTE:
• Check the intake air temperature and coolant temperature as close as possible to the intake air temperature
sensor and the coolant temperature sensor respectively.
• If it is not possible to check the intake air temperature, use the ambient temperature as reference.
Diagnostic
Item
code No.
Throttle angle
01
Pressure difference
(atmospheric pressure and
03 cylinder-#1 intake air pres-
sure)
Pressure difference
(atmospheric pressure and
04 cylinder-#2 intake air pres-
sure)
Intake air temperature
05
Coolant temperature
06
Vehicle speed pulse
07
Fuel system voltage (bat-
09
tery voltage)
Throttle switch
24
Grip warmer operation
26
Thumb warmer operation
27
FUEL INJECTION SYSTEM
Description of action
Displays the throttle angle.
• Check with throttle fully closed.
• Check with throttle fully open.
Displays the pressure difference (atmospheric pressure
and cylinder-#1 intake air pressure).
• Generate the pressure difference by cranking the
engine with the starter, without actually starting the
engine.
Displays the pressure difference (atmospheric pressure
and cylinder-#2 intake air pressure).
• Generate the pressure difference by cranking the
engine with the starter, without actually starting the
engine.
Displays the intake air temperature.
• Check the temperature in the air filter case.
Displays the coolant temperature.
• Check the temperature of the coolant.
Displays the cumulative number of vehicle pulses that
are generated when the tire is spun.
Displays the fuel system voltage (battery voltage).
Displays that the switch is on or off.
Operates the grip warmer and displays the self-diagno-
sis warning indicator 1 second after the grip warmer side
of the grip/thumb warmer adjustment switch is pushed.
The grip warmer operates and the self-diagnosis warn-
ing indicator remains on for 120 seconds.
This operation is performed each time the grip warmer
side of the switch is pushed. However, if the grip warmer
side of the switch is pushed again while the operation is
being performed, the operation will stop immediately and
restart from the beginning.
Operates the thumb warmer and displays the self-diag-
nosis warning indicator 1 second after the grip warmer
side of the grip/thumb warmer adjustment switch is
pushed.
The thumb warmer operates and the self-diagnosis
warning indicator remains on for 120 seconds.
This operation is performed each time the grip warmer
side of the switch is pushed. However, if the grip warmer
side of the switch is pushed again while the operation is
being performed, the operation will stop immediately and
restart from the beginning.
7-11
FI
Data displayed on meter
(reference value)
0 ~ 125 degrees
• Fully closed position (15 ~ 18)
• Fully open position (95 ~ 100)
• Not cranking: atmospheric
pressure
• Cranking: intake air pressure
decreases to less than the
atmospheric pressure.
• Not cranking: atmospheric
pressure
• Cranking: intake air pressure
decreases to less than the
atmospheric pressure.
Compare it to the value dis-
played on the meter. (Minimum
displayed value: –30 [°C])
Compare it to the value dis-
played on the meter. (Minimum
displayed value: –30 [°C])
(0 ~ 999; resets to 0 after 999)
OK if the numbers appear on
the meter.
0 ~ 18.7 V
Normally, approximately 12.0 V
Throttle open: on
Throttle closed: off
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