Sym GTS 250 Service Manual page 220

2. PM Sensor (Manifold Pressure Sensor)
1). Illustration:
PIN
Left (pin1)
Middle (pin2)
Right (pin3)
2). Power Source:
By ECU.
3). Check procedure:
a). PM Sensor connection (Use the detection pin)
b). Key-On, but don't start the engine.
c). Use the electric meter DCV function to check the PM sensor voltage
d). Check the working voltage:
‧Electric meter negative pole─ Connect the third pin (Green / Red).
‧Electric meter positive pole─ Connect the first pin on the left ( Yellow / Black )
Wire color
Yellow/Black 5V Voltage input
Black / Red Signal output
Green / Red Ground wire
(Like the following figure 3)
Function
5