The Communication Display Module (Cdm) - Club Car Gasoline Service Manual

THE COMMUNICATION DISPLAY MODULE (CDM)

20A
The CDM can be used to retrieve from the On-board Computer four important items of information that can
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be useful in troubleshooting a DS Electric vehicle with PowerDrive System 48. To access one of these items,
the item's corresponding Function Code must be selected on the CDM. This is done by pressing the Function
Button until the desired function code is displayed in the window (See Figure 20-11 for CDM features).
Releasing the button when the desired code is displayed will display the desired data. Function codes and
corresponding data are as follows:
• F1 - Battery voltage:
This displays the battery pack's current state of charge. A reading of less than 48 volts indicates that
the batteries need to be charged. If a reading of less than 48 volts is obtained immediately after a
charge cycle, there may be a problem in the charge circuit.
• F2 - Energy units removed since last charge cycle:
If the display reads over 75 (the vehicle Battery Trouble Light should be illuminated), the vehicle batter-
ies need to be recharged before being used again. This data can be used to make sure that all vehicles
in a fleet receive equal usage on a short term basis.
• F3 - Total accumulated energy units removed since initial vehicle start-up:
This information is most useful in making sure that all vehicles in a fleet receive equal usage over long
periods of time.
• F4 - Last charge termination type (1 = incomplete, 2 = DVDT, 4 = normal, 8 = max. timer):
A 1, 2, 4, or 8 will be displayed.
1 - Indicates that the last charge cycle was incomplete and that the batteries were not fully charged.
Batteries should be charged again at the earliest opportunity.
2 - Indicates that a back-up charge program was employed by the OBC to complete the charge cycle.
A DVDT charge may be displayed the first few times a new set of batteries is charged, and also the first
time a set of batteries is charged after the batteries have been disconnected and reconnected. A prob-
lem may exist if persistent DVDT readings are obtained.
4 - Indicates that the last charge cycle was normal.
8 - Indicates that the charger ran for sixteen hours and shut itself off without completing the charge
cycle. This means that there may be a problem in the charge circuit.
COMMUNICATION
DISPLAY MODULE
DISPLAY FUNCTIONS:
PRESS AND HOLD
BUTTON TO SHOW
FUNCTION NUMBER.
RELEASE BUTTON TO
SHOW FUNCTION VALUE.
Func1 - Battery voltage.
Func2 - Energy units removed since last charge cycle.
Func3 - Total accumulated energy units removed.
Func4 - Last charge termination type (1 = Incomplete,
2 = DVDT, 4 = Normal, 8 = Max. timer).
POWER
ON
OFF
Page 20-22
COMMUNICATION
DISPLAY MODULE
DISPLAY
WINDOW
FUNCTION
BUTTON
R
Club Car
PART #17075
FIGURE 20-11