Club Car 2009-20011 Electric Precedent Maintenance And Service Manual page 155

IQ SYSTEM TROUBLESHOOTING – MCOR
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
TABLE 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
2009-2011 Electric Precedent 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 on page
1-1. 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 on
page 17-13.
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 12-21
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
12-16
Replace the speed controller. See Speed
Controller Removal on page 17-12.
Disconnect the batteries and allow the
speed controller capacitors to discharge.
See WARNING "To avoid unintentionally
starting..." in General Warnings on page
1-1. Reconnect the batteries and see if the
symptom returns.
Replace solenoid. See Solenoid Removal on
page 17-13.
Disconnect the batteries and allow the
speed controller capacitors to discharge.
See WARNING "To avoid unintentionally
starting..." in General Warnings on page
1-1. Reconnect the batteries and see if the
symptom returns.
Replace the speed controller. See Speed
Controller Removal on page 17-12.
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