Sym HD2 125 Service Manual page 87

5. Fuel Injection System
Roll over sensor
5-24
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Functional Description:
Control power of the power relay coil, has the three-pin socket.
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When vehicles tilt angle greater than 65 degrees, roll over sensor will
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be the implementation of ECU system power off. At this point once
again to restart the engine, the need to re-open a main switch.
This as a safety device, when the dumping of vehicles, be cut off
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power supply of ECU, and engine stop.
Testing Procedures:
Because of the roll over sensor for the electronic control agencies, not
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against removed after a single measurement.
Normal state, after power is turned on the main switch, measurement
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of ECU power relays red / yellow line to the Green Line (ground), the
power supply voltage measurement can determine whether it is normal
for the roll over sensor.
Detection judge:
Voltage: Supply voltage = 5.0±0.1V
Treatment of abnormal phenomena:
Vehicle state vertical, power relays or ECU without electricity supply.
Roll over sensor internal short circuit or open circuit, or coupler bad
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contact.
Check whether the abnormal wire harness lines.
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Roll over sensor anomaly, the proposed replacement of the roll over
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sensor.