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11
Fault Descriptions
CONTROLLER DIAGNOSTIC TOOL (CDT)
FAULT DESCRIPTIONS
The following faults can be detected by the Excel System controller and seen under both the Monitor Menu and
Diagnostics Menu:
INCORRECT PASSWORD (OEM ACCESS LEVEL ONLY)
Each vehicle has a password in the form of a unique set of codes used to place the vehicle in "private speed mode".
If a set of codes has been entered incorrectly, the incorrect password fault is declared. For additional information
on codes, refer to Code A, Code B, and Code C. See Code A, Code B, and Code C on page 11-8. See also
Password Tries (OEM Access Level Only) on page 11-12.
MAX PASSWORD TRIES (OEM ACCESS LEVEL ONLY)
The max password tries fault is declared when the incorrect password fault has been declared several times. In the
event that the max password tries fault is indicated, the speed controller must be removed and shipped to Club Car
before it can ever be placed in "private speed mode". See Code A, Code B, and Code C on page 11-8. See also
Password Tries (OEM Access Level Only) on page 11-12.
THROTTLE FAULT
If the MCOR (Motor Controller Output Regulator) voltage is less than 0.20 volts or greater than 4.80 volts, the
controller detects a throttle fault.
What it means: If the voltage seen by the controller coming out of the MCOR is not within specified limits, this fault
occurs and the controller de-energizes the solenoid coil. Perform additional diagnostic if vehicle is running.
What to do: Replace MCOR. See following NOTE.
NOTE: Newer controllers may, infrequently, read voltages above or below limits and give a false fault.
LOW BATTERY VOLTAGE (UNDERVOLTAGE)
If the battery voltage falls below 34 volts ±5%, the low battery voltage fault is detected by the speed controller.
What it means: Could be a symptom, not a cause. Voltage coming into the controller is at, or less than, 34 volts.
What to do: Check battery voltage under a load.
OVERVOLTAGE
If the speed controller detects that the battery voltage is too high (68.4 to 75.6 volts DC), the overvoltage fault
is detected.
What it means: This is a symptom that occurs when the controller sees 72 or more volts. Reverse Buzzer beeps
when fault occurs and the car will freewheel.
What to do: Check to see if car has been towed without being put into "Tow" mode. Check charger relay because,
in Excel vehicles, bypassing the relay in the charger could cause the controller to read an overvoltage fault. Note
too that Excel vehicles, on hilly courses, may see this fault if the driver turns the key switch off while the vehicle is
in motor braking mode.
Page 11-18
2016 Precedent Golf Car Maintenance and Service Manual
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Table of Contents
Troubleshooting
