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:
Right Lamb-
da probe
Location:
•
sensor: right exhaust pipe
•
connector: near the throttle body right
side
Electrical specifications:
Heater circuit: 12 -14
Ω
at 20 °C (68 °F)
Pin-out:
1. Sensor (grey/white wire)
2. Sensor signal - (green/white wire)
3. Heater ground (white/yellow)
4. Heater power supply (white)
ELECTRICAL ERRORS
Check the air-fuel ratio / right Lambda probe P0130
- 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
Short-circuit to positive: excessive voltage at PIN 18 or PIN 12 of the control unit connector.
Open circuit or short-circuit to negative: interruption of the circuit or null voltage between control unit
connector PIN 18 and 12.
Troubleshooting
Short-circuit 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 18); if there is a short, restore the cabling.
Electrical system
V7 II ABS
ELE SYS - 112
Summary of Contents for V7 II ABS
Page 1: ...SERVICE STATION MANUAL 2Q000105 V7 II ABS ...
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 44: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Page 47: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 69: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 132: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 146: ...INDEX OF TOPICS ENGINE ENG ...
Page 148: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Page 158: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 173: ...V7 II ABS Suspensions SUSP 173 ...
Page 179: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 220: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 253: ...INDEX OF TOPICS BODYWORK BODYW ...
Page 270: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 278: ... Place the two seat saddle Pre delivery V7 II ABS PRE DE 278 ...