MOTO GUZZI V85 TT Service Station Manual page 165

V85 TT
Level in electrical circuit diagram:
intake air pressure sensor
Location:
•
on the vehicle: under the tank, left side.
•
connector: on the sensor.
Electrical specifications: -
Pin out:
1. Ground
2. Temperature signal
3. Power supply 5V
4. Signal
DIAGNOSTIC TOOL: PARAMETERS
Reference pressure Intake above sea level
•
Example value with key ON: 1009 mbar
•
Example value with engine on: 670 mbar
•
NOTES: 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
Left cylinder air pressure sensor P0105
•
short circuit to positive / open circuit, short circuit to negative.
Error cause
•
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
•
Short-circuit to positive: on the diagnostic tool, observe the cylinder air pressure sensor,
which will display a value of approx. 1200 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,
replace the sensor.
•
If open circuit, short circuit to negative: check the control unit connector and the sensor
connector; if not ok restore, if everything is OK, with key OFF, check the continuity between
the PIN 24 of the control unit connector and PIN 4 of the sensor connector: 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 ON, that voltage of approx. 5 V is present at PIN 3 of the sensor connector:
Electrical system
ELE SYS - 165