APRILIA SL 750 SHIVER Specifications download pdf (Page 109)

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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

SL 750 SHIVER Electrical system

ELE SYS - 51

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APRILIA SL 750 SHIVER Specifications Page 109

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