MOTO GUZZI GRISO 8V - 1200 Service Station Manual page 60

Electrical system
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.
AXONE: FUEL INJECTION SYSTEM
AXONE: PARAMETERS
Engine temperature
In case of recovery, this value is set by the control unit.
ELECTRICAL ERRORS
engine temperature sensor P0115 - open circuit, shorted to positive / shorted to negative.
Error cause
•
If the circuit is open, shorted to positive: excessive voltage has been detected at PIN 5 of
the BROWN connector.
•
If shorted to negative: voltage equal to zero has been detected at PIN 5 of the BROWN
connector
Troubleshooting
•
If the circuit is open, shorted to positive: check the sensor connector and the Marelli control
unit connector. If they are not OK, restore the cable harness; if OK, check the continuity of
the sensor; if it is not OK, replace the sensor; if it is OK, check continuity between PIN 5 of
the BROWN connector and PIN 2 of the sensor: restore cable harness if there is not con-
tinuity; if it is OK, reconnect the control unit connector and, with key set to key ON, check
the continuity between the sensor connector PIN 1 and the vehicle ground connection: if
there is not continuity, restore the cable harness; if there is continuity, it means that the cause
of the error is that the cable is shorted to positive and now the cable harness between the
BROWN PIN 5 and PIN 2 of the sensor should be restored. If the air temperature sensor
error is displayed at the same time, this means that the grey cable common for both sensors
is shorted to positive.
•
If shorted to negative, check sensor correct resistance: if resistance = 0, replace the sensor;
if resistance is correct, it means that the cable has ground connection: restore the cable
harness
NOTES No error is detected if the sensor does not work correctly or the control unit connector
or sensor terminals are rusty: then check through Navigator if the temperature indicated is the
same as the engine temperature. Check also that the sensor electrical characteristics are ob-
served: replace the sensor if not OK; if it is OK, check the sensor connector and the Marelli
control unit connector
ELE SYS - 60
GRISO 8V - 1200