Club Car CARRYALL 252 2007, Руководство по техническому обслуживанию и ремонту

Страница: 444 / 536

23
Faults Menu
IQ DISPLAY MODULE (IQDM) SERIES 2
AND IQDM-P DIAGNOSTICS
Faults displayed in the faults menu will aid the trained technician in troubleshooting the vehicle. Faults displayed often
indicate which components in the electrical system need to be tested.
Since the faults menu is updated while the vehicle is in operation, the trained technician has the ability to monitor
the occurrence of faults in conditions or locations where a problem with vehicle performance has been reported.
See following Warning.
WARNING
• The vehicle operator should not monitor the handset while the vehicle is in motion. A technician
can monitor the handset while traveling as a passenger in the vehicle. Failure to heed this warning
could result in severe personal injury or death.
SYSTEM FAULTS
NOTE: The system faults menu displays all of the present faults detected by the speed controller. The faults displayed
in this menu are currently active. Once a fault has been detected, it is stored in the memory of the speed
controller for display on the fault history menu. Each detected fault is listed only once in the fault history
menu, the number of fault occurrances are located in the fault counter section of the monitor menu, even
if the fault has occurred multiple times.
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
Page 23-10 2007-2009 Turf 252, Carryall 252 and XRT 900 Maintenance and Service Manual