ELECTRONIC SPEED CONTROL (48V)
Page F-25
Repair and Service Manual
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings
Fault
Code
Fault Vehicle Operation
Change
Corrective Action
- - - Direction Selector Fault Vehicle Operates in
One Direction Only
• At Direction Selector check wiring
Bad - Replace/repair wiring; Good - Replace selector switch
- - - No Buzzer Buzzer Inoperative • Verify Run-Tow/Maintenance Switch is in ‘RUN’ position;
• Verify 48 volts at J1 Pin 10; Repair/replace Pin 10 wire;
• Verify 48 volts at J1 Pin 1; Repair/replace Logic Power;
• (In Reverse) Verify 48 volts at J1 Pin 2; Repair/replace wire or micro
switch in Direction Selector switch
0 - 0 No Fault Codes Vehicle Inoperative
with Key ON
• Open Pedal Box, verify micro switch wiring is connected & is not dam-
aged; Repair/replace as necessary;
• Direction Selector Forward micro switch OPEN, verify switch is opera-
tional and wiring is connected & not damaged; Repair/replace as neces-
sary;
• Verify Key Switch is operational; Repair/replace as necessary
The following codes require the rear wheels be raised before performing tests:
1 - 1 Hardware Failsafe Vehicle will not run • Check motor wiring; Replace controller
1 - 2 Throttle Fault 1 Vehicle will not run • Check pedal box adjustment, connections; Replace ITS
1 - 3 Speed Sensor Fault Vehicle runs slowly • Check speed sensor magnet, wire, sensor & connector connections;
Replace speed sensor if necessary
1 - 4 High pedal disable Vehicle will not run • Release and reapply pedal; Check pedal box, linkage, switch, key
switch
1 - 5 Motor stall Vehicle stopped • Remove mechanical blockage
2 - 1 Low Battery Voltage Vehicle performance
reduced
• Perform discharge test; Charge batteries/replace bad batteries
2 - 2 High Battery Voltage Vehicle performance
reduced
• Verify that battery system is less than 48 volts
2 - 3 Thermal Cutback Vehicle performance
reduced
• Allow controller to cool and verify heat sink bolt tightness
2 - 4 Main driver on Vehicle runs slowly • Solenoid driver defective; Replace controller
2 - 5 Volts direct current fault Vehicle will not run • Replace controller
3 - 1 Main driver off Solenoid does not
close
• Replace controller
3 - 2 Solenoid Welded Vehicle runs slowly • Replace solenoid
3 - 3 Precharge fault Vehicle will not run • Check for additional electronics attached to B+; Replace controller
3 - 4 Field missing Solenoid closes, Vehi-
cle will not run
• Check wiring; Replace power harness and motor if required
3 - 5 Field overcurrent Vehicle will not run • Field windings or power harness shorted; Verify; Replace motor if nec-
essary
Fig. 7 48 volt Fault Codes
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