Club Car 2005 Precedent Maintenance And Service page 99

ELECTRICAL SYSTEM AND TESTING
TROUBLESHOOTING GUIDE 1
SYMPTOM
Test 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
Test Menu – KEY INPUT does not
indicate ON when key switch is in the
ON position
Diagnostic Menu – THROTTLE FAULT 1
fault code
Diagnostic Menu – HW FAILSAFE
(Hardware Failsafe) fault code
Diagnostic Menu – MAIN WELDED
(main solenoid contacts welded) fault
code
Diagnostic Menu – MAIN DRIVER ON or
MAIN DRIVER OFF fault code
Troubleshooting Guide continued on next page...
POSSIBLE CAUSES
Speed controller logic malfunction
Loose, broken, or disconnected wire(s) at
solenoid or B+ speed controller terminal
Loose or disconnected 16-pin connector
at speed controller or broken wire
Failed solenoid
Loose or disconnected wires at key switch
terminals or broken wire
Loose or disconnected 16-pin connector
at speed controller or broken wire
Failed key switch
Loose or disconnected three-pin
connector at the MCOR or broken wire
Loose or disconnected 16-pin connector
at speed controller or broken wire
Failed MCOR
Armature drive FET's (field-effect
transistors) inside speed controller have
failed
Speed controller logic malfunction
solenoid contacts have failed closed
Speed controller logic malfunction
Failure of the FET that controls the
solenoid coil
2005 Precedent IQ System Electric Golf Car Maintenance and Service Manual
Troubleshooting
CORRECTIVE ACTION
Disconnect the batteries and allow the
speed controller capacitors to discharge.
See WARNING "To avoid
unintentionally starting..." in General
Warnings, Section 1, Page 1-2.
Reconnect the batteries and see if the
symptom returns.
Repair and/or connect the loose or
disconnected wire(s)
Repair and/or connect the 16-pin
connector to the speed controller
Replace solenoid. See Solenoid
Removal, Section 12, Page 12-12.
Repair and/or connect the quick
disconnect terminals to the Forward/
Reverse switch
Repair and/or connect the 16-pin
connector to the speed controller
Test Procedure 8 – Key Switch and
MCOR Limit Switch Circuit on page 11-20
Repair and/or connect the three-pin
connector to the MCOR
Repair and/or connect the 16-pin
connector to the speed controller
Test Procedure 4 – MCOR Voltage on
page 11-17
Replace the speed controller. See Speed
Controller Removal, Section 12,
Page 12-11.
Disconnect the batteries and allow the
speed controller capacitors to discharge.
See WARNING "To avoid
unintentionally starting..." in General
Warnings, Section 1, Page 1-2.
Reconnect the batteries and see if the
symptom returns.
Replace solenoid. See Solenoid
Removal, Section 12, Page 12-12.
Disconnect the batteries and allow the
speed controller capacitors to discharge.
See WARNING "To avoid
unintentionally starting..." in General
Warnings, Section 1, Page 1-2.
Reconnect the batteries and see if the
symptom returns.
Replace the speed controller. See Speed
Controller Removal, Section 12,
Page 12-11.
11
Page 11-9