Service manual

CANDoo Professional
174
Overview
(See
3.1.3.2.3.2.2)
Overview:
The DESS keys/lanyards contain two distinct critical parts:
 A powerful magnet
 A microchip with a 64 bit serial number
The DESS post on the vehicle contains a reed switch, a center post, and a grounding ring around
the outside of the post. When a DESS key is inserted on the post, the magnet in the key closes the
reed switch in the DESS post. This "wakes up" the MPEM from hibernation, and the MPEM sends
out a signal on the center of the DESS post. Since the DESS key makes contact with the center
lug and the grounding ring, it sees this signal from the MPEM, and it sends its internal serial
number information to the MPEM. The MPEM compares this serial numbers to the serial numbers
contained in its internal list of keys.
If the serial number of the key matches one contained in the MPEM internal list of key serial
numbers, the MPEM gives the 2-beep signal and allows the operation of the vehicle. However, if
the serial number does not match, it gives the single long beep, and does not allow operation of the
vehicle.
The DI MPEM allows storing up to 8 key serial numbers in its list. CANDooPro allows you to
manage the list of keys, to add new keys up to a total of 8, and to erase keys.
The DI models have two main key operation profiles, Normal and Learning . (You can also
program Rental Keys, but they are basically the same as Learning )
Normal Keys allow full operation of the watercraft.
Learning/Rental keys limit the amount of speed to approximately 35 MPH, perfect for learning/first
time users (or that close friend or relative that always manages to ruin your stuff...)
Please note that ALL Sea Doo DESS lanyards are identical internally. They simply use a different
color float for the different function keys, (Normal Keys are Yellow, Learning Keys are White, Rental
Keys are Orange). You can use any kind of key for any purpose. For example, you can use a
White Learning key programmed as a Normal key, a Normal Key programmed as a Learning key,
etc.
3.1.3.2.3.2.2 Testing Keys
CANDooPro > Vehicles > Sea-Doo Watercraft > 2 Stroke DI Models(See 3.1.3) >
Working with CANDooPro(See 3.1.3.2) > Diagnostic Session Details(See 3.1.3.2.3) >
Keys Tab(See 3.1.3.2.3.2) >
Testing Keys
(See
3.1.3.2.3.2.1)
(See