APRILIA RSV4 RR 2017 Service Station Manual page 165

RSV4 RR-RF
Lambda sensor
(FRONT CYLINDER BANK)
Function
In charge of telling the control unit whether the
mixture is lean or rich
Operation / Operating principle
The Marelli injection control unit reads and inter-
prets a voltage generated by the difference in oxy-
gen content between the exhaust fumes and the
ambient. It does not require an external supply
source but, in order to work properly, it should
reach a high operating temperature: that is why
there is a heating circuit inside
Level in electrical circuit diagram:
Lambda probe
Position:
•
on manifold: left side of the vehicle
•
connector: left side of the vehicle, fixed
to the support bracket of the fairing lug
(4-way connector black)
Electrical specifications
•
Heater circuit: 7-9Ω at ambient temp.
Pin out:
1. Sensor signal + (black wire)
2. Sensor signal - (grey wire)
3. Heater ground connection (white cable)
4. Heater power supply (white cable)
DIAGNOSTIC TOOL:PARAMETERS
Lambda probe
•
Example value with key ON: about
3300 mV
•
Example value with engine on:
100-1000 mV
If there is a short circuit at + 5 V or higher, the
lambda probe parameter is not equal to the value
Electrical system
ELE SYS - 165