APRILIA SL 750 SHIVER Service Station Manual page 109

SL 750 SHIVER
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Check circuit continuity from probe connector (PIN 1 and PIN 2) toward the probe: replace
the lambda probe if there is no continuity; if there is continuity, check the sensor connector
and the Marelli control unit connector: If not OK, restore. If OK, check continuity between
the ENGINE connector PIN 43 and PIN 60 and restore the cable harness.
CAUTION
IN CASE THE Lambda sensor correction PARAMETER, WITH ENGINE AT IDLE AND H2O T >90
°C, WHICH IS NOT WITHIN THE 0.9 - 1.1 RANGE, WITHOUT ERRORS, CHECK:
- IF < 0.9, THE PROBE READS LEAN COMBUSTION CONDITIONS AND THE CONTROL UNIT
INCREASES INJECTION TIME; CAUSES: CHECK FOR INCORRECT AIR INTAKE, LITTLE PET-
ROL, RUSTY TERMINAL CONTACTS, DEFECTIVE PROBE.
- IF > 1.1, THE PROBE READS RICH COMBUSTION CONDITIONS AND THE CONTROL UNIT RE-
DUCES INJECTION TIME; CAUSES: LITTLE AIR, EXCESSIVE PETROL, DEFECTIVE PROBE.
Injector
INJECTOR
Function
To supply the correct amount of petrol at the right
timing.
Operation / Operating principle
Injector coil is excited for the petrol passage to
open.
Level in wiring diagram:Coils and injectors.
Location:
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on the vehicle: inside the filter casing
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connector: on injector
Electrical characteristics:
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14.8 Ohm +/- 5% (at 20 °C (68 °F))
Pin-out:
1. Supply: "+"
2. Ground connection
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
Front cylinder injection time
Rear cylinder injection time
AXONE: ACTIVATIONS
Front injector
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
Electrical system
ELE SYS - 51