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11
Fault Descriptions
CONTROLLER DIAGNOSTIC TOOL (CDT)
What to do: Charge batteries. If fault occurs more frequently than normal, test battery pack. Section 14 — Batteries:
IQ Plus Electric Vehicles
MAIN CONT DNC
The main cont dnc (main contactor (solenoid) did not close) fault is detected when the speed controller has sent
voltage to the solenoid activating coil but the solenoid contacts are not closed.
MAIN COIL FAULT
If the speed controller determines that the solenoid is not closing as a result of a solenoid coil failure, a main coil fault
is detected.
PROC/WIRING
This fault is detected if the Forward/Reverse switch is giving a signal to place the controller in forward and reverse at
the same time. This rare fault can be caused by a failed Forward/Reverse switch or improper vehicle wiring.
OPEN ARMATURE
If the accelerator pedal is pressed 2/3 to the floor, the armature current is less than 20 amps, and there are no
speed sensor pulses, an open armature fault is detected.
INCORRECT PASSWORD (OEM ACCESS LEVEL ONLY)
Each vehicle has a password in the form of a unique set of codes used to activate Mode 2. If a set of codes has been
entered incorrectly, the incorrect password fault is declared. See also Password Tries (OEM Access Level Only) on
page 11-11.
FAULT HISTORY
The fault history menu can be useful in determining the cause of a vehicle problem; however, the fault history alone
should not be the factor that determines when a component is replaced. Some faults detected by the speed controller
are not the result of a failed component, and are instead the result of vehicle operator error. If a fault appears in the
fault history menu, the trained technician should attempt to determine when and where the fault has occurred. For
example, if the motor stall fault is present in the fault history, the trained technician may be able to determine the
location on the course where an operator has held the vehicle on a hill by using the accelerator pedal.
CLEARING FAULT HISTORY
After a repair has been made, the fault history should be cleared. This will enable the trained technician to properly
troubleshoot the vehicle in the future, in the event that another problem occurs. If the fault history is not cleared
after a repair, a technician may mistakenly replace a new component due to an old fault code. For example, if the
MCOR device was disconnected and the speed controller detected a fault code associated with the throttle, the fault
history should be cleared so that any future problem is not diagnosed incorrectly as a throttle problem. See Fault
History Folder on page 11-16.
Page 11-22
2015 Carryall 500 and 700 Maintenance and Service Manual
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Table of Contents
Troubleshooting
