APRILIA MSS Mana GT ABS Service Station Manual page 103

MSS Mana GT ABS
Troubleshooting
•
If shorted to positive: disconnect the injection load relay (No. 29 on the wiring diagram) and
setting the key to KEY ON, measure the voltage read at PIN 1 of the relay connector towards
the cable harness: if voltage is equal to 5 or 12 V, restore the cable harness; if voltage is
equal to zero, replace the relay.
•
If shorted to negative: disconnect the injection load relay (No. 29 on the wiring diagram) and
setting the key to KEY ON (wait for a few seconds), check if there is continuity with the
ground cable to PIN 1 of the relay connector towards the cable harness: if there is continuity,
restore the cable harness; if there is not continuity, replace the relay.
•
If the circuit is open: check the injection control unit connector and the relay connector: if
they are not OK, restore; if they are OK, check the continuity of the grey/blue cable between
the two connectors: if there is not continuity, restore the cable harness; if there is continuity,
check the continuity of the yellow/grey cable between the relay connector and the auxiliary
D fuse: if there is not continuity, restore the cable harness; if there is continuity, check that
the relay presents no continuity between PINS 1 and 2, and replace the relay.
Coil
Function
It controls the ignition spark plug in order to gen-
erate the fuel ignition spark.
Operation / Operating principle
With inductive discharge: 2 coils with double sec-
ondary circuit (Twin spark)
Level in wiring diagram:Coils and injectors
Location:
•
Under helmet compartment: Right coil
(rear cylinder) and Left coil (front cylin-
der)
Electrical specifications:
•
Primary circuit resistance: approx.
0.57 Ω at 20°C between PIN 1 and 2
•
Secondary circuit resistance: approxi-
mately 7.3 Ohm at 20°C
Pin-out:
1. Supply + batt V
2. Activation from control unit
Electrical system
ELE SYS - 103