Sym Wolf SB 250 Ni Service Manual page 61

3. Fuel Injection System
Rollover sensor
Normal
Rollover
3-22
Function description
Rollover sensor controls power of the power relay coil and has
●
three-pin socket.
When the vehicle tilt angle is greater than 65 degrees, rollover
●
sensor will be the implementation of ECU system power-off. At
this time, to restart the engine, the main switch has to be turn on
again.
It is a safety device, when the vehicle rolls over, it will cut off
●
power supply to ECU.
Testing procedures:
Rollover sensor is an electronic control mechanism. It is unable to
●
test while the sensor removed from the vehicle.
In normal situation, key on, measure the voltage of white/brown
●
and green/pink (ground) wire of ECU, then the condition of the
rollover sensor can be judged.
Detection judge:
Voltage: Normal: 0.4~1.4V
Rollover: 3.7~4.4V
Treatment of abnormal phenomena:
Vehicle state vertical, no power supply to power relay or ECU.
Rollover sensor internal short circuit or open circuit, or coupler
●
poor contact.
Check if the wire harness abnormal.
●
If Rollover Sensor possibly failed, it is suggested to replace with a
●
new one.