APRILIA Atlantic 300 Service Station Manual page 158

Injection
c. Faulty stepper motor
F: Others
a. Not correctly adjusted timing system
b. Not correct idle carburetion
c. Not correctly reset throttle valve position sensor
2 MIU system failure may be caused by loose connectors. Make sure that all connections are properly
implemented.
Check the connectors as follows:
A check that the terminals are not bent.
B check that the connectors have been properly connected.
C see whether the malfunction can be fixed by slightly shaking the connector.
3 Check the entire system carefully before replacing the MIU control unit. If the fault is still present after
the MIU control unit is replaced, install the original control unit again and check whether the fault occurs
again.
4 Use a multimeter with an internal resistance over 10 K W /V when troubleshooting. Instruments that
are not suitable may damage the MIU control unit. Instruments must be used with definitions over 0.1
V and 0.5 W , the precision must be greater than 2%.
Terminals setup
key:
- Injection warning light LED (Pin 1)
- Rpm indicator on the instrument panel (Pin 2)
- CAN line "L" (Pin 3)
- Lambda probe "S-" (Pin 4)
- Live (Pin 5)
- Battery-powered (Pin 6)
- Immobiliser aerial (Pin 7)
INJEC - 158
ATLANTIC 300 i.e.