Sym JOYMAX 250 - 6. O2 Sensor (Exhaust Gas Oxygen Sensor); Check procedure

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6. O
2
Sensor (Exhaust Gas Oxygen Sensor):
1). Illustration:
2). Power Source:
a). Heating coil: From Battery
3). Check procedure:
1. Working voltage confirmation
a). Separate the coupler between O
2
Sensor and Wire harness; the pin assignment is like
figure 10.
b). Key-On, but don’t start the engine.
c). Use the electric meter DCV function to check the O
2
Sensor heater voltage.
d). Check the working voltage (From the wire harness side):
(Like the following figure11)
Use the electric meter negative pole to connect the second pin in the coupler
(Red/orange)
Use the electric meter positive pole to connect the first pin in the coupler (Red /
Yellow )
Blue/Orange(4)
Red/Orange(2)
Green/Red(3)
Red/Yellow(1)
Figure 10. Wire harness side O
2
Sensor Coupler