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RSV4 1100 Factory
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If short circuit to negative, open circuit: check the valve connector and the instrument panel
connector: if they are not ok, restore; if they are ok, check continuity on the Brown/White: if
not ok, restore; if ok, with the two connector disconnected, check the ground insulation: if
there is ground continuity, disconnect the instrument panel connector as well, and if there
is ground, restore the wiring harness and if there is no ground, replace the instrument panel;
if there is no ground continuity, replace the motor.
DIAGNOSTIC TOOL: LOGIC ERRORS
P1500 Exhaust valve position
Functional diagnosis:
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position error.
Error cause:
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The position indicate by the potentiometer does not correspond to the one set by the control
unit.
This error is indicated by flashing the general warning light and by lighting up in a fixed manner the MI
warning light.
Troubleshooting:
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Perform a mechanical check of the valve, check its normal rotation (with the cables discon-
nected from the motor, manually operate the cables and notice the movement regularity,
checking the complete stroke of the valve with the correct operation of the return spring) and
the absence of foreign objects that might obstruct its rotation: if not ok, restore; if ok, perform
the check procedure fro the valve connector and for the instrument panel connectors (ay
attention to oxidation signs) and check the cable resistance: if not ok, restore; if ok, with the
cables disconnected, check at key ON the normal rotation of the electric motor and replace
the motor (the potentiometer does not operate properly).
DIAGNOSTIC TOOL: ADJUSTABLE PARAMETERS
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Exhaust valve zero search
NOTES: The motor is placed in a reference position to be able to perform subsequently the correct
mechanical stoppers search.
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Exhaust valve self-learning
NOTES: Performs the minimum and maximum mechanical stoppers search.
CAUTION
AFTER ANY MAINTENANCE OR INSPECTION OF THE EXHAUST VALVE, ALWAYS CARRY OUT
THE PROCEDURE "ADJUSTING EXHAUST VALVE ACTUATOR CABLE FREE PLAY".
The system consists of a throttle valve with return spring on the exhaust. The valve is closed by means
of the two cables moved by an electric motor in its turn electrically connected to the instrument panel.
The logic and the motor control, however, reside in the Marelli injection control unit that dialogues with
the instrument panel via the CAN.
Electrical system
ELE SYS - 175
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