APRILIA SL 750 SHIVER Service Station Manual page 107

SL 750 SHIVER
1. Sensor signal + (black wire)
2. Sensor signal - (grey wire)
3. Heater ground connection (white)
4. Heater power supply (white)
THE CONNECTION DIAGRAMS ARE IN THE ELECTRICAL SYSTEM SECTIONS; PAY ATTENTION
TO THESE DIAGRAMS AS THEY SHOW THE CONNECTOR/COMPONENT AS VIEWED FROM
THE CABLE HARNESS SIDE, THAT IS LOOKING AT THE CABLES WHEN GOING OUT OF THE
"MAIN" CABLE HARNESS AND INTO THE CONNECTOR/COMPONENT.
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL CON-
CEPTS OF ELECTRICAL TROUBLESHOOTING FOUND AT THE BEGINNING OF THE CHECKS
AND CONTROLS SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
AXONE: PARAMETERS
Lambda probe
Example value: 0 - 1000 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 displayed instead.
Lambda sensor correction
Example value: 1.00
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 corre-
sponds to -25%. In an open circuit, the lambda probe signal is too low. Therefore, the control 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.
AXONE: STATUSES
Lambda
Example value: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
Example value: 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.
AXONE: ACTIVATIONS
Lambda probe heating
The auxiliary injection relay (No. 42 in the wiring diagram, placed under fuel tank, right side, third relay
starting from the front; CHECK, however, the identification of the relay with the colour of the cables) is
energised 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 indications are displayed in case
of lack of activation.
Electrical system
ELE SYS - 49