Club Car Carryall 500 2019 Maintenance And Service Manual page 164

11
Diagnostics Menu
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 speed 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 speed 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 vehicle speed controller should be checked for fault codes before any service is performed.
The speed controller, after detecting a fault, will respond in one or more of the following ways:
1. Reduce vehicle speed to zero by reducing armature current to zero
2. Reduce vehicle speed to zero by reducing field current to zero
3. Turn off Main Contactor
4. "Limp-Home:" Cause the vehicle to run at half speed
5. Gradually reduce the armature current limit
6. Quickly reduce the armature current until speed sensor pulses occur
7. Gradually reduce Regen Current Limit
8. SmartKey functions NOT enabled
9. PASSWORD TRIES count incremented
10. Set Internal Scaled Throttle Signal to Zero
11. Turn off Walk Away Relay
12. Activate Walk Away function
13. Activate Walk Away beeping immediately
Page 11-18 2019 Carryall 500 and 700 Maintenance and Service Manual
CONTROLLER DIAGNOSTIC TOOL (CDT)