Immobiliser circuit
The EMS system is integrated with the immobiliser
anti-theft device.
Its functions are:
- Start-up enabled by key recognition.
- Deterrent flashing.
System components
The system consists of:
-EMS system control unit
- Decoder
- Aerial
- Master key (red)
- Service key (black)
- Deterrent and diagnosis LED
Virgin circuit
When control unit (ECU) and decoder are not pro-
grammed, the following conditions occur:
- Key switch set to "OFF". Deterrent flashing inac-
tive.
- Key switch set to "ON". Ignition and injection dis-
abled and LED on with solid light.
When the key switch is set to "ON", the LED
switches on as shown in the figure.
The LED is turned on by the decoder.
The control unit data can be checked by the diag-
nostic tester.
Specific tooling
020460Y Scooter diagnosis and tester
To connect the diagnostic tester, open the spark plug inspection port and pull out the EMS Diagnosis
socket. Remove the protection cap and connect the tester terminal.
Power the diagnostic tester by connecting the terminals to the battery poles, or the specific connector
to the socket inside the gloves compartment.
X8 400 Euro 3 Injection
INJEC - 239
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