Page F-ii
Repair and Service Manual
TABLE OF CONTENTS FOR SECTION ‘F’ (CONT..)
SECTION TITLE
PAGE NO.
ELECTRONIC SPEED CONTROL
48 VOLT SYSTEM HAULER 1000
48 VOLT SYSTEM VEHICLES GENERAL...........................................................................................F - 17
OPERATION .........................................................................................................................................F - 17
Pedal Box .................................................................................................................................. F - 18
Speed Sensor........................................................................................................................... F - 18
Controller.................................................................................................................................. F - 18
GENERAL TROUBLESHOOTING .......................................................................................................F - 19
Symptoms ................................................................................................................................ F - 19
Testing ..................................................................................................................................... F - 19
Testing Battery Voltage ............................................................................................................ F - 20
Continuity Check ...................................................................................................................... F - 20
Testing a Switch for Continuity ................................................................................................. F - 21
Testing a Solenoid for Continuity.............................................................................................. F - 21
TROUBLESHOOTING DIAGRAMS .....................................................................................................F - 22
INDUCTIVE THROTTLE SENSOR (ITS) TESTING AND REPLACEMENT ........................................F - 30
CONTROLLER REPLACEMENT .........................................................................................................F - 32
SOLENOID REPLACEMENT ...............................................................................................................F - 32
LIST OF ILLUSTRATIONS
Fig. 14 Run-Tow/Maintenance Switch ...................................................................................................................... F - 17
Fig. 15 Access to Pedal Box ..................................................................................................................................... F - 18
Fig. 16 Controller and Solenoid ................................................................................................................................ F - 19
Fig. 17 Battery Reference Voltage............................................................................................................................ F - 20
Fig. 18 Continuity Check of Switch ........................................................................................................................... F - 21
Fig. 19 Continuity Check of Solenoid........................................................................................................................ F - 21
Fig. 20 48 volt Fault Codes ....................................................................................................................................... F - 22
Fig. 21 Controller Connectors and Connections ....................................................................................................... F - 23
Fig. 22 48 Volt Wiring Diagram ................................................................................................................................. F - 24
Fig. 23 J-1 Pin Connector Diagnostics...................................................................................................................... F - 25
Fig. 24 J-1 Pin Connector Diagnostics (Continued) .................................................................................................. F - 26
Fig. 25 J-2 Pin Connector Diagnostics...................................................................................................................... F - 27
Fig. 26 Secondary Wiring Diagnostics ...................................................................................................................... F - 28
Fig. 27 ITS and Plunger ............................................................................................................................................ F - 29
Fig. 28 ITS Adjustment (Sheet 1 of 2)....................................................................................................................... F - 30
Fig. 29 ITS Adjustment (Sheet 2 of 2)....................................................................................................................... F - 31
Fig. 30 Contoller Wiring ............................................................................................................................................ F - 33
