CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGIN-
NING OF THE CHECK AND CONTROL SECTION IN THE
ELECTRICAL SYSTEM CHAPTER.
DIAGNOSIS INSTRUMENT: STATUSES
Lambda probe: Start-up_Lean_Rich_Fault due to rich value_Fault due to lean value
•
If the probe connector is removed (voltage almost equal to zero), the status is Fault due to
lean value
Lambda check: Open loop/Closed loop/Rich in closed loop/Lean in closed loop/enriched
•
Closed loop indicates that the control unit is using the lambda probe signal to keep the
combustion as close as possible to the stoichiometric value.
DIAGNOSIS INSTRUMENT: ACTIVATION
Lambda probe heating
•
The auxiliary injection relay (No. 35 in the wiring diagram, placed in the front relay box, left
side; CHECK, however, the identification of the relay with the colour of the cables) is ener-
gised and the heating circuit is closed to ground 5 times (pin 3 of the lambda probe
connector). The continuity of the wiring is necessary for correct activation: no error indica-
tions are displayed in case of lack of activation
DIAGNOSIS INSTRUMENT: ELECTRICAL ERRORS
lambda probe P0130
•
shorted to positive
Error cause
•
Excessive voltage (battery voltage) has been detected at PIN 10 and 22 of the ENGINE
connector. Caution: the 'lambda probe' parameter is not the real value that is read; a re-
covery value is displayed instead. The instrument panel does not indicate the presence of
this error even in the ATT status.
Troubleshooting
•
shorted to positive: with key set to ON, disconnect the sensor connector and measure PIN
1 voltage on the cable harness side (grey cable): if there is voltage (5 or 12 V), restore the
cable harness; if there is not, replace the lambda probe
Lambda probe heating P0135
•
short circuit to positive/ open circuit, short circuit to negative
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 32 of the ENGINE con-
nector. If the circuit is open, shorted to negative: voltage equal to zero has been detected
at PIN 32 of the ENGINE connector. The instrument panel does not indicate the presence
of this error even in the ATT status.
Troubleshooting
Electrical system
DORSODURO 1200 ABS - ATC
ELE SYS - 154
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Summary of Contents for DORSODURO 1200 ABS - ATC
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