SECTION 2 SYSTEM —CONTENTS— Group 1 Controller Group 5 Electrical System Outline .....................................................T2-1-1 Outline .....................................................T2-5-1 Can (Network Provided for Machine) ........T2-1-2 Main Circuit ..............................................T2-5-2 Electric Power Circuit (Key Switch: OFF)..T2-5-4 MC: Main Controller .................................T2-1-4 ECM: Engine Control Module .................T2-1-20 Accessory Circuit......................................T2-5-6 ICF: Information Controller .....................T2-1-22 Starting Circuit (Key Switch:
START) ........T2-5-8 Outline ...................................................T2-1-25 Charging Circuit (Key Switch: ON)..........T2-5-12 Group 2 Control System Serge Voltage Prevention Circuit ............T2-5-16 Pilot Shut-Off Circuit (Key Switch: ON) ...T2-5-18 Outline .....................................................T2-2-1 Security Lock Circuit...............................T2-5-20 Engine Control .........................................T2-2-4 Engine Stop Circuit (Key Switch:
OFF) ...T2-5-22 Pump Control .........................................T2-2-26 Security Horn Circuit...............................T2-5-24 Valve Control..........................................T2-2-40 Wiper Circuit ..........................................T2-5-28 Working Light Circuit ..............................T2-5-26 Group 3 ECM System Other Controls........................................T2-2-60 Outline .....................................................T2-3-1 Fuel Injection Control ...............................T2-3-2 Engine Start Control ...............................T2-3-10 EGR (Exhaust Gas Recirculation) Control .................................................T2-3-12 Fuel Injection Amount Correction............T2-3-14 Engine Stop Control ...............................T2-3-16 Group 4 Hydraulic System Outline .....................................................T2-4-1 Pilot Circuit...............................................T2-4-2 Main Circuit ............................................T2-4-12 Boom Lower Meter-In Cut Control ..........T2-4-24 1V7T-2-1