8.2.3 Function of fuel gauge ............................................................................................................8-16
8.2.4 Function of coolant temperature gauge ..................................................................................8-16
8.3 Function of fuel level sensor ...........................................................................................................8-17
8.4 Function of coolant temperature sensor..........................................................................................8-17
8.5 Function of oil pressure switch........................................................................................................8-18
9. Others.....................................................................................................................................................8-19
9.1 Electrical circuit for accessory.........................................................................................................8-19
9.2 Function of DC outlet ......................................................................................................................8-20
SERVICING .....................................................................................................................................................8-21
1. Troubleshooting for electrical system .....................................................................................................8-21
2. Servicing specifications for electrical system .........................................................................................8-27
3. Tightening torques for electrical system .................................................................................................8-28
4. Checking and adjusting ..........................................................................................................................8-29
4.1 Battery.............................................................................................................................................8-29
4.1.1 Checking battery voltage ........................................................................................................8-29
4.1.2 Checking battery terminal connection.....................................................................................8-29
4.1.3 Checking battery specific gravity ............................................................................................8-29
4.2 Main switch .....................................................................................................................................8-30
4.2.1 Checking main switch connector voltage................................................................................8-30
4.2.2 Checking main switch continuity at off position.......................................................................8-30
4.2.3 Checking main switch continuity at on position ......................................................................8-31
4.2.4 Checking main switch continuity at preheat position ..............................................................8-31
4.2.5 Checking main switch continuity at start position ...................................................................8-31
4.3 Starter .............................................................................................................................................8-31
4.3.1 Checking motor.......................................................................................................................8-31
4.3.2 Testing starter magnet switch (pull-in, holding coils) ..............................................................8-32
4.4 Glow plug ........................................................................................................................................8-32
4.4.1 Checking glow plug lead terminal voltage ..............................................................................8-32
4.4.2 Checking glow plug continuity ................................................................................................8-33
4.5 Safety switch ...................................................................................................................................8-33
4.5.1 Checking PTO shift lever switch continuity .............................................................................8-33
4.5.2 Checking HST neutral switch continuity .................................................................................8-34
4.6 Operator presence control (OPC) system.......................................................................................8-34
4.6.1 Checking seat switch and seat turnover switch continuity...................................................... 8-34
4.6.2 Checking OPC timer ...............................................................................................................8-35
4.7 Fuel pump .......................................................................................................................................8-36
4.7.1 Checking fuel pump connector voltage...................................................................................8-36
4.7.2 Checking fuel pump continuity................................................................................................8-36
4.8 Engine stop solenoid.......................................................................................................................8-36
4.8.1 Testing engine stop solenoid ..................................................................................................8-36
4.9 Timer relay ......................................................................................................................................8-37
4.9.1 Checking timer relay connector voltage..................................................................................8-37
4.9.2 Testing timer relay...................................................................................................................8-37
4.10 Charging system ...........................................................................................................................8-37
4.10.1 Checking battery charging current........................................................................................8-37
4.11 Combination switch .......................................................................................................................8-38
4.11.1 Removing combination switch...............................................................................................8-38
4.11.2 Checking combination switch connector voltage ..................................................................8-38
4.11.3 Checking head light switch continuity when setting switch at OFF position.......................... 8-38
4.11.4 Checking head light switch continuity when setting switch at ON position ........................... 8-39
4.11.5 Checking turn signal light switch continuity when setting switch knob at OFF position ........ 8-39
4.11.6 Checking turn signal light switch continuity when setting switch knob at RIGHT position .... 8-40
4.11.7 Checking turn signal light switch continuity when setting switch knob at LEFT position....... 8-40
4.11.8 Checking hazard switch continuity when setting switch knob at OFF position ..................... 8-41
4.11.9 Checking hazard switch continuity when setting switch knob at ON position ....................... 8-41
4.11.10 Checking flasher unit connector voltage .............................................................................8-41
4.11.11 Testing flasher unit actuation...............................................................................................8-42
4.12 Gauge ...........................................................................................................................................8-43
xii
BX23S, LA340, BT603, RCK54D, RCK60D, RCK54, RCK60B
KiSC issued 03, 2017 A
