EXCEL SYSTEM TROUBLESHOOTING: WITH
POWERDRIVE CHARGER
Troubleshooting
13
TROUBLESHOOTING GUIDE 1
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Loose or disconnected motor speed sensor
or broken wire
Repair and/or connect the three-pin connector
to the motor speed sensor
Loose or disconnected 16-pin connector at
speed controller or broken wire
Repair and/or connect the 16-pin connector
to the speed controller
Test Menu – SPEED PULSES menu item
indicates that speed pulses are OFF when
the vehicle is in motion or Diagnostic Menu –
SPEED SENSOR fault code
Failed motor speed sensor
Test Procedure 21 – Motor Speed Sensor on
Loose or disconnected two-pin connector at
the MCOR3 or broken wire
Repair and/or connect the two-pin connector
to the MCOR
Loose or disconnected 16-pin connector at
speed controller or broken wire
Repair and/or connect the 16-pin connector
to the speed controller
Test Menu – FOOT INPUT menu item indicates
that the MCOR3 internal limit switch is always
ON or always OFF.
Failed MCOR
Test Procedure 8 – Key Switch and MCOR3
Limit Switch Circuit on page 13-20
Loose or disconnected Forward/Reverse
rocker switch (quick disconnect terminals) or
broken wire
Repair and/or connect the quick disconnect
terminals to the Forward/Reverse switch
Loose or disconnected Forward/Reverse
rocker switch (three-pin connector) or broken
wire
Repair and/or connect the three-pin connector
from the Forward/Reverse switch to the wire
harness
Loose or disconnected 16-pin connector at
speed controller or broken wire
Repair and/or connect the 16-pin connector
to the speed controller
Test Menu – FORWARD INPUT and/or
REVERSE INPUT does not indicate the
correct reading
Failed Forward/Reverse rocker switch
Test Procedure 23 – Forward/Reverse Rocker
Speed controller logic malfunction
Disconnect the batteries and allow the
speed controller capacitors to discharge.
See WARNING “To avoid unintentionally
starting...” in General Warnings on page
1-2.
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 16-pin connector at
speed controller or broken wire
Repair and/or connect the 16-pin connector
to the speed controller
Test Menu – MAIN CONT DRIVER (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.
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 16-pin connector at
speed controller or broken wire
Repair and/or connect the 16-pin connector
to the speed controller
Test Menu – KEY INPUT does not indicate ON
when key switch is in the ON position
Failed key switch
Test Procedure 8 – Key Switch and MCOR3
Limit Switch Circuit on page 13-20
TABLE CONTINUED ON NEXT PAGE
2014 Precedent
®
Golf Car Maintenance and Service Manual
Page 13-9
Summary of Contents for Precedent 2014
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