MOTO GUZZI NEVADA Service Station Manual page 91

NEVADA - NEVADA ANNIVERSARIO
LEFT LAMBDA
Level in electrical circuit diagram:Left lambda
probe
Location:
•
sensor: right exhaust pipe
•
connector: adjacent to the filter box, left
side
Electrical characteristics:
Heater circuit: 12 -14 Ω at 20 °C (68 °F)
Pin-out:
1. Sensor signal + (pink wire)
2. Sensor signal - (green/white wire)
3. Heater ground (violet/white)
4. Heater power (red/brown cable)
ELECTRICAL ERRORS
Check the air-fuel ratio / right Lambda probe P0136 - short to positive / open circuit, short to negative
or carburetion excessively lean / signal not plausible for abnormal title correction or probe signal fault.
Error cause
Shorted to positive: excessive voltage at PIN 11 or PIN 12 of the control unit connector.
Circuit open or shorted to negative: interruption of the circuit or null voltage between control unit con-
nector PIN 11 and 12.
Troubleshooting
Shorted to positive:
•
Disconnect the control unit connector and the sensor connector.
•
Verify that there is no short to battery positive on sensor connector PIN 1 (corresponding to
control unit connector PIN 11); if there is a short, restore the cabling.
Electrical system
ELE SYS - 91