Checking The Injectors; Checking The Throttle Valve Potentiometer - APRILIA pegaso 650 i.e. Service Manual

Pegaso 650 I.E.

6.5.5 CHECKING THE INJECTORS

With the engine switched off:
N
Remove the saddle, see p 7.1.7 (REMOVING THE
SADDLE).
NOTE
The following procedure refers to a single injec-
tor, though it is applicable to both.
N
Disconnect the two-way connector (1) (coloured black)
and take the measurements (on the injector-side termi-
nals).
Using a pocket tester (scale 100 Ω), measure the re-
N
sistance between the terminals of the injector.
Standard value: 11.5 – 13 Ω to 20 °C (68 °F).
If the resistance is infinite (
scribed level, the injector (2) must be changed.
N
Repeat the procedure for the other injector.
6.5.6 CHECKING THE THROTTLE VALVE
POTENTIOMETER
With the engine switched off:
N
Remove the saddle, see p 7.1.7 (REMOVING THE
SADDLE).
N
Disconnect the three-way connector (3) (coloured
black).
a
CAUTION
Upon reassembly, make sure that the electric con-
nector (3) is correctly coupled.
N
Turn the ignition switch to position "1".
N
Using a tester (kΩ scale), measure the resistance be-
tween the potentiometer terminals (4); measurement
(X) (Y).
SIZE (X)
Resistance between the two terminals, "A" (5) and "B" (6),
whatever the position of the throttle valves:
Standard value: 1.2 kΩ ± 10%.
SIZE (Y)
Resistance between the terminals, "A" (5) and "C" (7):
Starting with the throttle valve fully closed, accelerating
progressively until completely open, the resistance
should vary as follows.
Standard value
– with throttle valves closed 1.2 kΩ ± 10%;
– with throttle valves open 2.4 kΩ ± 10%.
NOTE
If the measurements result in any resistance val-
ues other than those given, replace the potentiometer (4).
NOTE
For the reassembly or replacement of the poten-
tiometer (2), see 4.9.9 (CHANGING AND ADJUSTING
THE THROTTLE VALVE POTENTIOMETER).
Release 00/2002-02
∞
) or lower than the pre-
ELECTRIC SYSTEM
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