Speed Sensor; Main Welded; Main Driver On; Main Driver Off - Club Car 2009-20011 Electric Precedent Maintenance And Service Manual

IQ DISPLAY MODULE (IQDM) AND IQDM-P
DIAGNOSTICS: EXCEL SYSTEM
What it means: If the voltage seen by the controller coming out of the MCOR is not within specified limits, this
fault occurs.
What to do: Replace MCOR.
NOTE: Newer controllers may, infrequently, read voltages above or below limits and give a false fault.

SPEED SENSOR

If the speed controller does not detect pulses from the speed sensor while the controller outputs power (greater than
75% armature PWM) to the motor, a speed sensor fault is detected.
What it means: Speed sensor is not working.
What to do: Replace speed sensor.

MAIN WELDED

If the speed controller detects that the solenoid contacts are welded closed, a main welded fault is detected.
What it means: The solenoid contact is welded closed and will not dropout when pedal is released, or key switch
is turned to OFF, or FNR is switched to N.
What to do: Replace solenoid.

MAIN DRIVER ON

If the FET that controls the closing of the solenoid contacts is found to be energized when it should not be, a main
driver on fault is detected by the speed controller.
What it means: The controller FET controlling the energizing of the solenoid is on (or energized) when it should
not be. This causes main contactors to stay engaged.
What to do: Replace controller.

MAIN DRIVER OFF

If the FET that controls the closing of the solenoid is not energized when it should be, a main driver off fault is
detected by the speed controller.
What it means: The controller FET controlling the energizing of the solenoid is off (or not energized) when it should be.
What to do: Replace controller.

MAIN COIL OPEN

If the speed controller determines that the solenoid is not closing as a result of a solenoid coil failure, a main coil
open fault is detected.
What it means: An open circuit in the solenoid coil. It could be in either the ground side or B+ side of the circuit.
What to do: Check for a broken or disconnected blue wire on the B+ side of the solenoid coil, a broken or disconnected
blue/white wire on the B- side of the solenoid coil, a broken coil wire inside the solenoid which would result in zero
ohms resistance reading, a defective coil which could result in very low coil resistance (usually less than 40 ohms;
large solenoids should read 180 - 190 ohms; small solenoids 200 - 250 ohms), a broken blue/white wire at the 16-pin
controller plug or its terminal is loose in the 16-pin plug.
2009-2011 Electric Precedent Maintenance and Service Manual
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Faults Menu
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