Location:
•
on the vehicle: exhaust end behind the
rear head
•
connector: on the right side, at the back
of the filter box
Electrical specifications
•
Heater circuit: 7-9Ω at Ambient temp.
Pin out:
1.
Sensor signal + (black wire)
2. Sensor signal - (grey wire)
3. Heater ground connection (white cable)
4. Heater power supply (white cable)
DIAGNOSIS INSTRUMENT: PARAMETERS
Lambda probe
•
Example value with key ON: 0 mV
•
Example value with engine on:
100--900 mV
If there is a short circuit at + 5 V or above, the
lambda probe parameter is not equal to the value
read by the control unit; a recovery value is dis-
played instead
Lambda correction
•
Example value with key ON: 1.00 mV
•
Example value with engine on: 0.90 -
1.10mV
In closed loop, the value must be close to 1.00
(values not within the 0.90 - 1.10 interval indicate
a fault): for example, value 0.75 corresponds to
+25% with respect to the reference injection time;
1.25 corresponds to -25%. In an open circuit, the
lambda probe signal is too low. Therefore, the con-
trol unit takes it as a lean combustion condition and
will try to enrich it. The value read will be 0.75: once
this correction has been tried, the value shifts to
1.00 fixed and the Lambda probe error is signalled
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
DORSODURO 1200 ABS - ATC Electrical system
ELE SYS - 153
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