Interpreting Error Messages - Cannondale 5002401 Service Manual

The vehicle's lighting or starting electrical systems
are isolated from the EMS power relay supplying the
ECU. Lighting can remain on if the ECU is powered-
down. Or, if insufficient battery voltage is present to
hold the EMS relay on, the starter could turn over the
engine, but because the ECU is powered-down, the
engine would not start.
Motorcycles
1. Press the ON/OFF button to ON. This will enable
the engine management system circuits.
2. Next, quickly press and release the engine start
button without starting the engine. The green LED
on the interface cable will light when the engine
management circuits are powered up.
ATVs
1. Turn the ignition switch to the "ON" position, then
switch the Engine RUN/OFF switch to the "RUN"
position.
2. Quickly press and release the green start button
without starting the engine. The green LED on the
interface cable will light when the engine manage-
ment circuits are powered up.
NOTE :
On ATVs, after 2 minutes of inactivity (ECU power-
down), the interface cable block green LED will
not go out. It will remain lit as long as the ATV
ignition is in the "ON" position.
Electrical_EFI Service Manual.fm
© 2002 Cannondale Corporation - All Rights Reserved

INTERPRETING ERROR MESSAGES

Failed to Unlock System 125
The "Failed to Unlock System 125" message
means that the Cannondale Diagnostic and Mainte-
nance Tool was not able to communicate with the
vehicle ECU. There can be several causes:
• Check the interface cable at the vehicle harness
connector. Make sure the vehicle connector
pins are not bent or broken inside the
connector. Make sure the cable connector and
vehicle coupler are locked together.
• Check the interface cable attachment to the PC.
Make sure the interface cable is plugged in to
the COM port securely.
• Make sure the right COM port is selected. Refer
to "Verifying COM port setup" starting on
page 23.
• Make sure the vehicle battery is fully charged.
• Make sure the vehicle engine management
system is powered-up. See page 23.
• Click "OK" and start again.
• If the "Failed to Unlock System" message
displays repeatedly,
24
the vehicle ECU or