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ELECTRICAL SYSTEM AND TESTING
Troubleshooting
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 11-13
11
Diagnostic Menu – FIELD MISSING
fault code
Loose or disconnected motor field coil
wires at motor or speed controller or
broken wire
Repair and/or connect the field coil wires
Failure of the motor field windings
Section 16 – Motor
Failure of the FET’s that control field
current
Replace the speed controller.
Controller Removal, Section 13,
Page 13-11.
Diagnostic Menu – HPD (high pedal
detect) fault code
Operator error
Train operators to fully remove foot from
accelerator pedal before turning key
switch to the ON position or changing the
selected direction with the Forward/
Reverse switch
Diagnostic Menu – LOW BATTERY fault
code
Batteries require charging
Place batteries on battery charger and
allow them to fully charge
Improperly maintained or failed batteries
Diagnostic Menu – MOTOR STALL fault
code
Operator error
Train operators to use the brake to hold
the vehicle on a hill, rather than holding
the vehicle on a hill using the accelerator
pedal
Diagnostic Menu – OPEN ARMATURE
fault code
Loose or disconnected motor armature
wires at motor or speed controller or
broken wire
Repair and/or connect the motor armature
wires
Failure of the motor armature or brushes
Section 16 – Motor
Failure of the FET’s that control armature
current
Replace the speed controller.
Controller Removal, Section 13,
Page 13-11.
TROUBLESHOOTING GUIDE 1
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION