MOTO GUZZI V7 CLASSIC Specifications download pdf (Page 50)

nector and the PIN related to the pink/black cable (cable harness side) of the sensor: restore

cable harness if there is not continuity; if it is OK, reconnect the control unit connector and,

with key set to ON, check continuity between the PIN related to the grey cable (cable harness

side) of the sensor and the vehicle ground connection: if there is not continuity, restore cable

harness; if there is continuity, it means that the error cause is a shorted-to-positive cable;

therefore, restore cable harness between PIN 18 of the control unit and the PIN related to

the pink/black cable (cable harness side) of the sensor. If the engine temperature sensor

error is displayed at the same time, it means that there is short circuit to positive in the grey

cable of both sensors.

•

If shorted to negative, check sensor correct resistance: if resistance = 0, replace the sensor;

if resistance is correct, it means that the pink/black cable has ground connection: restore

cable harness

REMARKS No error is detected if the sensor does not work correctly or the control unit connector or

sensor terminals are rusty: then check through Axone if the temperature indicated is plausible in relation

to the ambient temperature. Check also that the sensor electrical characteristics are observed: replace

the sensor if not OK; if it is OK, check the sensor connector and the Marelli control unit connector

Lambda sensor

Function

It tells the control unit whether combustion 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 wiring diagram:Lambda Probe

Location:

•

sensor: exhaust pipe

•

connector: next to the starter motor

Electrical characteristics:

Heater circuit: 12-14 Ω at 20 °C (68 °F)

Pin-out:

Electrical system V7 Classic

ELE SYS - 50

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MOTO GUZZI V7 CLASSIC Specifications Page 50