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Electrical system
At key-ON, the variable geometry control unit low-
ers the ducts (if still in the raised position). Subse-
quently, depending on the control voltage on PIN
2 from the injection control unit (0V down, 5V up),
the control unit drives the electric motor with the
relative polarity for raising or lowering the ducts.
The drive voltage delivered to the motor is deter-
mined in relation to battery voltage and the motor
is stopped once a given current limit is reached or
if the time-out period of 500 ms has elapsed.
Level in electrical circuit diagram:
Variable geometry
Location:
•
on the vehicle: ducts and motor inside
the filter box, variable geometry control
unit on rear frame under the saddle,
right side.
•
variable geometry control unit connec-
tor: on the control unit.
•
connector of the electrical motor cable
to the engine cable harness: outside
the filter box next to the rear upper in-
jectors.
Electrical specifications:
Electrical motor resistance. 4.5 +/- 0.5 Ω; PIN 1:
0V normal, Vbatt fault PIN 2: 0V ducts control
down, 5V ducts control up.
Pin out:
1. Control unit fault
2. Control from the injection ECU
3. Key ON (Vbatt)
4. Engine +
5. Engine -
6. Ground connection
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGIN-
NING OF THE CHECK AND CONTROL SECTION IN THE
ELECTRICAL SYSTEM CHAPTER.
ELE SYS - 166
RSV4 Factory a-PRC
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