Yamaha YZF-R1S Service Manual page 434

3. Voltage
S Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness side)
as shown.
Positive tester probe ! black/red
Negative tester probe ! black/white
S Turn the main switch to "ON".
S Measure the voltage (DC 12V) of black/
red 1 and black/white
sembly coupler.
S Is the voltage within specification?
YES
This circuit is OK.
1
2
at the meter as-
2
NO
The wiring circuit
from the main switch
to the meter assem-
bly is faulty and must
be repaired.
8-41
SIGNALING SYSTEM
EAS00803
6. The fuel level warning light fails to come on.
1. Fuel sender
S Drain the fuel from the fuel tank and remove
the fuel pump from the fuel tank.
S Disconnect the fuel sender coupler from the
wire harness.
S Connect the pocket tester (Ω
fuel sender terminals as shown.
Positive tester probe ! green/white
Negative tester probe ! black
S Measure the fuel sender resistances.
NOTE:
Measure the resistances when the float arm
is in contact with the full position and empty
position of the stopper.
Fuel sender resistance
Full position of the float
20 X 26 Ω at 20_C (68_F)
Empty position of the float
134 X 140 Ω at 20_C (68_F)
S Is the fuel sender OK?
YES
ELEC
10) to the
1
2
NO
Replace the fuel
pump.