Club Car Carryall 500, Maintenance And Service Manual

Page: 172 / 456

12
Troubleshooting
ELECTRICAL SYSTEM TROUBLESHOOTING:
IQ PLUS ELECTRIC VEHICLES
TROUBLESHOOTING GUIDE 1
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
Speed controller logic malfunction
Failed controller FET (that powers up
solenoid coil)
Disconnect the batteries and allow the speed controller
capacitors to discharge. See WARNING “To avoid
unintentionally starting...” in See General Warnings
on page 1-1. Reconnect the batteries and see if the
symptom returns.
Loose, broken, or disconnected wire(s) at
solenoid or B+ speed controller terminal
Repair and/or connect the loose or disconnected wire(s)
Loose or disconnected 24-pin connector
at speed controller or broken wire
Repair and/or connect the 24-pin connector to the speed
controller
Monitor Menu – MAIN CONT (solenoid)
does not indicate ON when the solenoid
should be activated. or Diagnostic
Menu – MAIN CONT DNC (main
contactor (solenoid) did not close) fault
code
Failed solenoid Replace solenoid. See Solenoid Removal on page 13-8.
Loose or disconnected wires at key switch
terminals or broken wire
Repair and/or connect the quick disconnect terminals to
the Forward/Reverse switch
Loose or disconnected 24-pin connector
at speed controller or broken wire
Repair and/or connect the 24-pin connector to the speed
controller
Monitor Menu – KEY INPUT does not
indicate ON when key switch is in the
ON position
Failed key switch
Test Procedure 7 – Key Switch and MCOR Limit Switch
Circuit on page 12-23
Loose or disconnected three-pin connector
at the MCOR or broken wire
Repair and/or connect the three-pin connector to the
MCOR
Loose or disconnected 24-pin connector
at speed controller or broken wire
Repair and/or connect the 24-pin connector to the speed
controller
Diagnostic Menu – THROTTLE FAULT
1 fault code
Failed MCOR Test Procedure 12 – MCOR Voltage on page 12-27
Armature drive FET’s (field-effect
transistors) inside speed controller have
failed
Replace the speed controller. See Speed Controller
Removal on page 13-9.
Diagnostic Menu – HW FAILSAFE
(Hardware Failsafe) fault code
Speed controller logic malfunction
Disconnect the batteries and allow the speed controller
capacitors to discharge. See WARNING “To avoid
unintentionally starting...” in See General Warnings
on page 1-1. Reconnect the batteries and see if the
symptom returns.
Diagnostic Menu – MAIN WELDED
(main solenoid contacts welded) fault
code
Solenoid contacts have failed closed Replace solenoid. See Solenoid Removal on page 13-8.
Speed controller logic malfunction
Disconnect the batteries and allow the speed controller
capacitors to discharge. See WARNING “To avoid
unintentionally starting...” in See General Warnings
on page 1-1. Reconnect the batteries and see if the
symptom returns.
Diagnostic Menu – MAIN DRIVER ON
or MAIN DRIVER OFF fault code
Failure of the FET that controls the
solenoid coil
Replace the speed controller. See Speed Controller
Removal on page 13-9.
Diagnostic Menu – MAIN COIL FAULT
fault code or Diagnostic Menu – MAIN
DROPOUT fault code
Solenoid coil has failed in an open
condition or broken wire to solenoid coil
Replace solenoid. See Solenoid Removal on page 13-8.
TABLE CONTINUED ON NEXT PAGE
Page 12-10 2017 Carryall 500 and 700 Maintenance and Service Manual