Page E-i
Repair and Service Manual
ELECTRONIC SPEED CONTROL - TCT
TABLE OF CONTENTS FOR SECTION ‘E’
SECTION TITLE
PAGE NO.
TRUCOURSE TECHNOLOGY (TCT) SYSTEM™
GENERAL .................................................................................................................................................................. E - 1
TRUCOURSE TECHNOLOGY SYSTEM™ PERFORMANCE OPTIONS & DIAGNOSTICS .................................. E - 1
Changing Performance Options .................................................................................................................... E - 1
TRUCOURSE TECHNOLOGY (TCT) SYSTEM™ OPERATION ............................................................................... E - 2
Pedal Box ...................................................................................................................................................... E - 3
Speed Sensor ................................................................................................................................................ E - 3
Controller ....................................................................................................................................................... E - 3
GENERAL TROUBLESHOOTING ............................................................................................................................. E - 4
Symptoms ...................................................................................................................................................... E - 4
Testing Battery Voltage ................................................................................................................................. E - 5
Continuity Check ............................................................................................................................................ E - 4
Testing a Switch for Continuity ...................................................................................................................... E - 5
Testing a Solenoid for Continuity ................................................................................................................... E - 5
TROUBLESHOOTING DIAGRAMS ........................................................................................................................... E - 6
INDUCTIVE THROTTLE SENSOR (ITS) TESTING AND REPLACEMENT ............................................................ E - 10
CONTROLLER REPLACEMENT ............................................................................................................................. E - 13
SOLENOID REPLACEMENT ................................................................................................................................... E - 13
LIST OF ILLUSTRATIONS
Fig. 1 Run-Tow/Maintenance Switch .......................................................................................................................... E - 2
Fig. 2 Access to Pedal Box ......................................................................................................................................... E - 3
Fig. 3 Controller and Solenoid .................................................................................................................................... E - 3
Fig. 4 Battery Reference Voltage ............................................................................................................................... E - 4
Fig. 5 Continuity Check of Switch ............................................................................................................................... E - 5
Fig. 6 Continuity Check of Solenoid ........................................................................................................................... E - 5
Fig. 7 Controller Faults and Troubleshooting ............................................................................................................. E - 7
Fig. 8 Controller Connectors and Connections ........................................................................................................... E - 8
Fig. 9 Controller Wiring Diagram ................................................................................................................................ E - 9
Fig. 10 ITS and Plunger ............................................................................................................................................ E - 10
Fig. 11 ITS Adjustment (Sheet 1 of 2) ...................................................................................................................... E - 11
Fig. 12 ITS Adjustment (Sheet 2 of 2) ...................................................................................................................... E - 12
Fig. 13 Solenoid Wiring ............................................................................................................................................ E - 14
