Electrical Characteristics - Segway VILLIAN SSV Series Service Manual

ELECTRICAL SYSTEM

Electrical characteristics

The electronic control unit ECU monitors various sensors, actuators, and power amplifi er circuits and
detection circuits. When the oxygen sensor fails, the system performs open-loop control, and the
corresponding fuel consumption will increase. Common fault codes are shown in the fault summary
table.
!
When checking the oxygen sensor signal failure, the engine should be operated for at least 5-10min to
ensure that the oxygen sensor heating is completed.
Oxygen sensor failure check:
◆ Check whether the oxygen sensor connector is well connected.
◆ Unplug the connector, check whether the sensor and the wire harness end pins are bent or
deformed, etc.
◆ Check whether the resistance between pins B and D is normal.
◆ Check whether the voltage between pin B and the main relay is normal.
◆ Connect the connector and run the engine for a period of time, check whether the voltage between
pins A and C is normal.
◆ Use an M22mm open-end wrench to remove the sensor, and check whether the sensor probe is
deformed or damaged.
In addition, the oxygen sensor is an indirect refl ection sensor. If other sensors are faulty, the oxygen
sensor will also report a fault:
◆ The battery voltage is not credible.
◆ The absolute pressure signal of the intake manifold is unreliable.
◆ The signal of the engine temperature sensor is unreliable.
!
When disassembling the oxygen sensor, be careful of the muffl er and engine, and be careful of burns!
A
C
14 - 48
B
D