PIAGGIO MP3 500 i.e. SPORT, Service Station Manual

Page: 258 / 432

c . Wrong reset of the throttle valve position sensor
2 . Failures in the RIU system 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 : check whether the failure changes if the connector is slightly vibrating.
3 . Check thoroughly the entire system before replacing the RIU control unit. If the fault is fixed even by
replacing the RIU control unit, install the original control unit again and check if the fault occurs again.
4 . For troubleshooting, use a multimeter with an internal resistance of more than 10 KW/V. Improper
instruments may damage the RIU control unit. The instruments to be preferred have a definition over
0.1V and 0.5W and an accuracy over ± 2%.
Terminals setup
INJECTION ECU CONNECTOR
1 . Start-up enabling switch (Purple-White)
2 . Not connected
3 . Rpm indicator (Green)
4 . Live power supply (Red-White)
5 . Injector (Red-Yellow)
6 . Electric fan relay (Green-White)
7 . Ground lead 1 (Black)
8 . HV coil (Pink-Black)
9 . ABS Warning Light (Light blue-Red)
10 . Injection loads relay (Black-Purple)
11 . Injection warning light (Brown-Black)
12 . Engine speed sensor negative (Brown)
13 . Engine speed sensor positive (Red)
14 . Immobilizer LED (Yellow)
15 . Ground 2 (Black)
16 . ASR Button (Light blue-Blue) (if applicable)
17 . Line K (Orange-Black)
18 . Stop light relay (Brown-White)
19 . ECO mode (brown-red)
20 . CAN L Line (Pink-White)
21 . Engine stop switch (Green-Black)
22 . Engine temperature sensor (Light blue-Green)
Injection
MP3 500 i.e. SPORT Business_LT_ ABS-ASR_EU_USA (2015)
INJEC - 258