the endless screw (however it must turn a bit): if not OK, place it correctly; if OK, replace the
variable geometry control unit.
Engine rpm sensor
Function
informs crankshaft position and speed to the Mar-
elli control unit
Operation / Operating principle
inductive sensor: sinusoidal-type generated volt-
age; two teeth are missing on the flywheel for the
reference position
Level in electrical circuit diagram:
Engine speed sensor
Location:
•
on the vehicle: on the clutch cover
•
connector: under the tank on the right
(3-ways black connector)
Electrical specifications:
0.79 kohm at ambient temperature
Pin out:
1. negative signal
2. positive signal
3. shielding with ground connection
DIAGNOSTICS INSTRUMENT: PARAMETERS
Engine rpm: rpm
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.
DIAGNOSTICS INSTRUMENT: STATUSES
Synchronised panel
•
No_under analysis_standby_Yes
DIAGNOSTICS INSTRUMENT: ELECTRICAL ERRORS
CAUTION
IF THE ELECTRIC CIRCUIT IS INTERRUPTED OR SHORT-CIRCUITED, NO ERROR IS DIS-
PLAYED. CHECK THE ENGINE SPEED SENSOR CONNECTOR AND THE MARELLI CONTROL
UNIT CONNECTOR: IF NOT OK, RESTORE; IF OK, CHECK THE CORRECT ELECTRIC CHAR-
ACTERISTICS OF THE SENSOR: IF NOT OK, REPLACE THE SENSOR. IF OK, CHECK THAT
THERE IS CONTINUITY ON BOTH CABLES, SUPPLY INSULATION AND GROUND INSULATION.
Electrical system RSV4 Factory a-PRC
ELE SYS - 168
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