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Electrical system
•
Start the engine, after about one minute of operating bring the speed to 3000-5000 RPM,
then measure with a tester the voltage at the battery poles that must always be between
13V and 15V. Otherwise, if the correct operation of the alternator has already been checked,
replace the regulator.
CAUTION
PERFORM THE CHECK DESCRIBED ABOVE WITH A BATTERY IN GOOD CONDITION (START
VOLTAGE ABOUT 13V) MAKING SURE THAT THERE ARE NO ELEMENTS IN THE SHORT CIR-
CUIT.
Start-up system check
Function
Communicates to the control unit the will to start-
up the engine.
Operation / operating principle
Press the start-up button to close the specific cir-
cuit taking the PIN 58 of the control unit to a voltage
equal to zero (ground closing).
Level in wiring diagram:
Start-up signal
Location:
•
on the vehicle: right light switch.
•
connector: inside the bow (4-ways
black).
Electrical characteristics:
•
key released: the circuit is open
•
key pressed: the circuit is closed
Pin out:
2: voltage + 5V
3. ground
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: ELECTRICAL ERRORS
Starter switch P0170
•
shorted to positive / open circuit, shorted to negative.
Error cause
ELE SYS - 152
RSV4 Factory a-PRC
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