Yamaha F100A - Throttle Position Sensor (TPS)

8-15
–+
ELEC
E
IGNITION CONTROL SYSTEM
THROTTLE POSITION SENSOR (TPS)
1. Check:
●
TPS input voltage (at idling speed)
Out of specification → Check the CDI
unit.
TPS input voltage (R – O):
5 ± 0.25 V
P
O
R
2. Check:
● TPS output voltage (at idle speed)
Out of specification → Adjust the TPS
position.
NOTE:
Set the digital tester to the manual range. In
the auto range the voltage changes cannot
be accurately measured.
3. Adjust:
●
TPS position
Output voltage (P – O):
0.7 ± 0.02 V
Checking steps:
●
Connect the test harness.
●
Connect the tester leads to the test
harness (P – O).
● Start the engine, allow it to warm up
for several minutes.
●
Measure the voltage at engine idling
speed.
●
While slowly opening and closing the
throttle valves, check if the voltage
changes gradually.
Adjustment steps:
●
Start the engine at idling speed.
●
Move the throttle control lever until it
contacts the fully-closed stopper. Refer
to “Carburetor pickup timing check
and adjustment” in chapter 3.
●
Loosen the screws.
●
Adjust the position of the TPS until the
specified voltage is obtained.
●
Tighten the bolts.