APRILIA RSV4 RR 2017 Service Station Manual page 157

RSV4 RR-RF
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NOTE: pressure estimated by the control unit according to the throttle position
Rear Cylinder estimated Intake Pressure (1 and 3)
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Example value with key ON: 1004 mbar
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Example value with engine on: 735 mbar
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NOTE: pressure estimated by the control unit according to the throttle position
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
Rear bank air pressure sensor P0105
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short circuit to positive / open circuit, short circuit to negative, signal not plausible.
Error cause
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Short-circuit to positive: excessive voltage has been detected on PIN 24. If open circuit, short
circuit to negative: voltage equal to zero detected at PIN 24.
Troubleshooting
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Short-circuit to positive: see that the parameter of the rear cylinders air Pressure Sensor on
the diagnostic tool reads approx. 1,200 mbar; disconnect the sensor connector: if the value
does not change, this means there is a short circuit in the cable between the control unit
connector and the sensor connector, restore the wiring harness; if the value changes, re-
place the sensor.
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If open circuit, short circuit to negative: check the Marelli control unit connector and the
sensor connector; if not ok restore, if everything is OK, with key OFF, check the continuity
between Marelli control unit connector PIN 24 and sensor connector PIN 3: if there is no
continuity, restore the wiring harness, if there is continuity, check the ground insulation of
the cable: if there is continuity to ground, restore the wiring harness, if there is no continuity,
check (with key in ON position) that there is a voltage of approx. 5 V present at PIN 1 on the
sensor connector: if not ok turn the key to OFF and check continuity between ENGINE
connector PIN 25 and PIN 1 on the sensor connector: if not OK, restore the wiring harness;
if OK, replace the control unit; if a voltage of 5 V is present at PIN 1, check (with key in ON
position) for continuity between PIN 3 on the sensor connector and ground: if not OK, restore
the wiring harness; if OK, replace the sensor.
Front bank air pressure sensor P1105
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short circuit to positive / open circuit, short circuit to negative, signal not plausible.
Error cause
Electrical system
ELE SYS - 157