Engine Rpm Sensor - APRILIA RS4 125 Service Station Manual

Electrical system
Maximum output voltage - high level: Vdc of the
pull-up resistance
Operating temperature range: -20÷60 °C (-4 °F÷
140 °F)
Function
To indicate the vehicle speed by reading the front
wheel turning speed.
Operation / Operating principle
Magnetoresistive sensor: generation of a square
wave.
Pin-out:
A. Control unit power
B. Control unit ground
C. Signal
ELECTRICAL ERRORS
Sensor/vehicle speed signal P0500 - over maximum limit/ signal not valid.
Error cause
Faulty sensor or cabling, interference on the signal.
Troubleshooting
•
Disconnect the sensor connector.
•
Verify, with the key ON, the presence of voltage (5V) between PIN A and B of the control
unit side connector.
•
If no voltage is read verify the continuity of the cabling between the control unit side sensor
connector (PIN A, B and C) and the control unit connector itself (PIN 21, 15 and 28).
•
If the cabling is intact but still no voltage is read, verify the insulation from ground of PIN A
control unit side sensor connector.

Engine rpm sensor

Ohmic resistance normalised at a temperature of
20 °C (68 °F): 105-124 Ohm
ELE SYS - 114
RS4 125