Club Car Carryall 300 2021, Maintenance And Service Manual

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11
Fault Descriptions CONTROLLER DIAGNOSTIC TOOL (CDT)
What it means: This is a symptom, not a cause. The controller records the number of times this occurs.
What to do: Charge batteries. If fault occurs more frequently than normal, test battery pack. Section 14 — Electric
Vehicle - Batteries
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. If vehicle continues to operate at half speed, check accessory wiring.
HIGH SPEED WALKAWAY
If the controller receives a signal to activate walk away braking while the vehicle is moving at a speed greater than 2
mph (3.2 km/h), the controller registers a
high speed walkaway fault .
What it means: This is a symptom, not a cause. The key switch was turned to OFF while the vehicle was coasting
faster than 2 mph (3.2 km/h).
What to do: Most likely, this is due to driver error. If not, check speed sensor on motor and key switch for proper
operation.
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. Check connection.
What to do: Replace speed sensor.
MAIN DRIVER ON
If the field-effect transistor (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. Pin 12 provides ground for the solenoid coil when FORWARD,
REVERSE, KEY, or FOOT INPUT is present at the controller. If the ground continues to be present once either KEY,
FOOT, FORWARD or REVERSE INPUT is removed,
main driver on is detected.
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;
Page 11-20 2021 Carryall 300 Maintenance and Service Manual