Page G-7
Repair and Service Manual
B
B
ELECTRONIC SPEED CONTROL
Read all of Section B and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
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
Aux coil fault
Vehicle will not run
• Check walkaway relay wiring
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
Aux driver off
Vehicle will not run
• Check Walkaway relay wiring; Replace controller
4 - 1
Current sense fault
Vehicle will not run
• Replace controller
Fig. 7 48 Volt Fault Codes
