•
If no switching from high: is shown when the ratio control is in closed loop and when the
secondary air valve is not operating. The error is validated if the engine is in CUTOFF status
and the probe signal is close to 1V, or if the engine is in another operating condition that
requires the injection but the switching from the"HIGH RATIO" to "LOW RATIO" is missing
for a certain"adjusted" number of dead points (PMS or TDC).
•
If no switching from low: is shown when the ratio control is in closed loop and when the
secondary air valve is not operating. The error is validated if during the ratio control stage,
the switching from "HIGH RATIO" to "LOW RATIO" is missing for a certain"adjusted" number
of upper dead points (PMS or TDC).
The instrument panel indicates this error by lighting up in a fixed manner the MI warning light.
Troubleshooting:
•
If no switching from high: the fault may be generated in the supply system (poor pin sealing)
or in the probe. Check the wiring harness. if NOT OK restore; if OK, replace the lambda
probe.
•
If no switching from low: the fault may be generated in the supply system (dirty injector, low
fuel supply system pressure) or in the probe. Check the wiring harness. if NOT OK restore;
if OK, replace the lambda probe.
•
For the (non polarised) type of probes, this error may be caused also by a short circuit to
the wiring harness ground.
NOTE
THIS ERROR DISABLES THE RATIO CONTROL IN CLOSED LOOP.
(REAR 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:
Tuono V4 1100 Factory
Electrical system
ELE SYS - 197
Summary of Contents for 2Q000504
Page 1: ...SERVICE STATION MANUAL 2Q000504 Tuono V4 1100 Factory ...
Page 4: ......
Page 6: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 12: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 55: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Page 63: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 103: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 270: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 299: ...INDEX OF TOPICS ENGINE ENG ...
Page 415: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Page 425: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 463: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 508: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 548: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 561: ...INDEX OF TOPICS BODYWORK BODYW ...