HS120V CHAPTER 5 HOHFWULF#V\VWHP (/(&75,&6 1. SPECIFICATIONS ................................... 5-2 4.2.10 Telemetics controller .....................5-88 4.2.11 RCV assembly (LH) (RH) ..............5-90 2. CIRCUIT AND COMPONENT LOCATION .............................................. 5-3 4.2.12 Safety sensor (safety bar) ............. 5-91 2.1 Electric circuit diagram ................................ 5-3 4.2.13 Seat switch ....................................5-92 2.2 Location of electronic components ............. 5-5 4.2.14 Oil temperature sensor ..................5-93 4.2.15 Horn...............................................5-93 3. WIRING IDENTIFICATION .....................
5-7 4.2.16 Wiper motor ...................................5-94 3.1 Wiring color identification ............................ 5-7 4.3 Lamps (Bulb replacement) ........................5-95 3.2 Cross sectional area of wiring ....................5-8 3.3 Symbols for electric components ...............5-8 4.3.1 Led work lamp .................................5-95 4.3.2 Turn signal lamp .............................5-95 3.4 Fuse ............................................................ 5-9 4.3.3 Brake lamp (Rear lamp) / Turn signal lamp .................................................5-96 3.4.1 Inspection ..........................................
5-9 4.3.4 Room lamp ...................................... 5-97 3.5 Electric device diagnosis .......................... 5-10 3.4.2 Cause for blown fuse ........................ 5-9 5. TROUBLESHOOTING .......................... 5-98 4. ELECTRIC COMPONENTS ...................5-11 5.1 When the engine cannot be started ..........5-98 4.1 Engine room ...............................................5-11 5.2 When the system is not charged ............ 5-100 4.1.1 Battery ..............................................5-11 5.3 When the system is not preheated automatically ..........................................
5-102 4.1.2 Fuse box ...........................................5-11 4.1.3 Starter motor ....................................5-13 5.4 When work lamp cannot be operated .... 5-105 4.1.4 Alternator ..........................................5-14 5.5 Fuel gauge operation ..............................5-107 5.6 Temperature gauge operation ................ 5-108 4.1.5 Glow plug ........................................ 5-16 5.7 Hour meter operation .............................. 5-109 4.1.6 Coolant temperature sensor ............ 5-16 4.1.7 Engine oil pressure switch ................5-18 6.
WIRING DIAGRAM ..............................5-111 4.1.8 ECU ..................................................5-18 6.1 Main ........................................................5-111 4.1.9 Sensors and relays ...........................5-19 6.2 MCU update .............................................5-115 4.2 Cabin & Chassis .......................................5-39 4.2.1 Ignition switch ................................. 5-39 7.
EXPLODED VIEW ................................5-116 4.2.2 Escort unit .......................................5-40 7.1 LF1-G311007 Engine electrical group ......5-116 7.2 LF1-G327001 Light control group ............5-117 4.2.3 Flasher ............................................ 5-41 4.2.4 Switch panel ...................................
5-41 7.3 LF1-G328002 Power socket group ..........5-118 4.2.5 Engine accelerator dial ...................5-43 7.4 LF1-G331001 Wire harness group ...........5-119 4.2.6 Accelerator pedal sensor ................5-44 7.5 LF1-G332001 Cluster control group .......5-120 7.6 LF1-G332501 Fuel sender group .............5-121 4.2.7 Relay box ........................................5-46 4.2.8 Instrument panel ............................. 5-47 7.7 LF1-G333501 Vehicle control group ....... 5-122 4.2.9 MCU (Micro Controller Unit) ............5-74 TABLE OF CONTENTS