APRILIA RSV4 RR Service Station Manual page 187

RSV4 RR/RF
•
If circuit is open, shorted to negative: check circuit continuity from probe connector (PIN 3
and 4) toward the probe: if it is not OK, replace the probe; if it is OK, check the sensor
connector and the Marelli control unit connector: if it is not OK, restore; if it is OK, with key
set to ON and sensor connector disconnected, check if there is battery voltage at PIN 4: if
it is not OK, check the red/brown cable continuity between the probe connector and the
injection relay (No. 33 in the electrical circuit diagram, placed under the saddle next to the
battery positive, CHECK, however, the identification of the relay with the colour of the ca-
bles). If there are also coil, lower and upper injector and secondary air errors, check the
relay and its excitation and power line; if there is voltage at PIN 4, check ground insulation
of the green cable (PIN 3): if not OK, restore the cable harness. If it is OK, check the continuity
of the Green cable (between the sensor connector PIN 3 and the ENGINE PIN 32) and
restore the cable harness
•
If circuit is open, shorted to negative: check circuit continuity from probe connector (PIN 3
and 4) toward the probe: if it is not OK, replace the probe; if it is OK, check the sensor
connector and the Marelli control unit connector: if it is not OK, restore; if it is OK, with key
set to ON and sensor connector disconnected, check if there is battery voltage at PIN 4: if
it is not OK, check the red/brown cable continuity between the probe connector and the
injection relay (No. 33 in the electrical circuit diagram, placed under the saddle next to the
battery positive, CHECK, however, the identification of the relay with the colour of the ca-
bles). If there are also coil, lower and upper injector and secondary air errors, check the
relay and its excitation and power line; if there is voltage at PIN 4, check ground insulation
of the green cable (PIN 3): if not OK, restore the cable harness. If it is OK, check the continuity
of the green cable (between the sensor connector PIN 3 and the ENGINE PIN 32) and
restore the cable harness.
WARNING
The control unit does not detects the following malfunctions of the Lambda probe circuit according to
the signal: interrupted circuit, shorted to ground or sensor malfunction (for example non variable volt-
age). In case of fault indication, carry out the following troubleshooting.
Troubleshooting
•
Check circuit continuity from probe connector (PIN 1 and PIN 2) toward the probe: replace
the Lambda probe if there is no continuity; if there is continuity, check the sensor connector
and the Marelli control unit connector: If not OK, restore. If OK, check continuity between
the ENGINE connector PIN 22 and PIN 10 and restore the cable harness.
Electrical system
ELE SYS - 187