Club Car Carryall 300 2021, Maintenance And Service Manual

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CONTROLLER DIAGNOSTIC TOOL (CDT) Diagnostics Menu
11
CAUSES OF FAULTS
Some common causes of faults are:
• Loose, broken, or disconnected wires or connectors
• Failed components
• Improper adjustment or installation of electrical or mechanical components (examples: brake adjustment, improper
MCOR installation)
• Improper wiring of electrical components
As shown above, there are many possible causes for faults to occur, and the controller has a programmed reaction to
each fault that is based on the fault currently detected. The technician should be familiar with the detected faults and
the controller’s reactions to faults to ensure a proper diagnosis.
An example of a possible mis-diagnosis of a vehicle due to a fault: If the three-pin speed sensor wire has been
disconnected, the controller will detect a
speed sensor fault. When a speed sensor fault is detected, the controller
responds to the fault by limiting the vehicle speed to 1/2 of its normal top speed. If the technician reaches the
conclusion that the vehicle is running slowly because batteries are heavily discharged, he has made an improper
diagnosis of the problem.
The controller should be checked for fault codes before any service is performed.
After detecting a fault, the controller will respond in one or more of the following ways:
• A. Reduce vehicle speed to zero by reducing armature current
• B. Reduce vehicle speed to zero by reducing field current to zero
• C. Turn off the solenoid
• D. Cause the vehicle to run at slow speed
• E. Gradually reduce the armature current limit
• F. Quickly reduce the armature current until speed sensor pulses occur
• G. Reduce field current and beep reverse buzzer at a fast rate
• H. Limits vehicle speed per Anti-Tamper setting
• J. Adds the occurrence to the fault counter
• K. Activates a warning device
• L. Locks out Private Speed Mode
2021 Carryall 300 Maintenance and Service Manual Page 11-15