Engine Control System - Suzuki DF150 Service Manual

ENGINE CONTROL SYSTEM

ENGINE CONTROL SYSTEM STRUCTURE ..................................................... 3- 2
SYSTEM STRUCTURE 1 .......................................................................... 3- 2
SYSTEM STRUCTURE 2 .......................................................................... 3- 3
COMPONENTS FOR SYSTEM CONTROL ....................................................... 3- 4
ENGINE CONTROL MODULE (ECM) ...................................................... 3- 4
ECM CONNECTOR/TERMINALS LAYOUT ............................................. 3- 5
ECM INTERNAL STRUCTURE ................................................................ 3- 6
LOCATION OF SENSOR AND SWITCH .................................................. 3- 7
SENSOR AND SWITCH ............................................................................ 3- 9
IGNITION SYSTEM ............................................................................................ 3-16
IGNITION CONTROL SYSTEM ................................................................ 3-17
ELECTRONIC FUEL INJECTION SYSTEM ....................................................... 3-19
FUEL INJECTION CONTROL SYSTEM ................................................... 3-19
FUEL DELIVERY SYSTEM COMPONENTS ............................................ 3-21
HIGH PRESSURE FUEL PUMP CONTROL SYSTEM ............................. 3-24
AIR INTAKE COMPONENTS ................................................................... 3-25
IDLE AIR CONTROL SYSTEM ................................................................. 3-26
MULTI-STAGE INDUCTION ............................................................................... 3-29
OUTLINE ................................................................................................... 3-29
SYSTEM COMPOSITION ......................................................................... 3-29
SYSTEM OPERATION .............................................................................. 3-30
VVT (Variable Valve Timing) SYSTEM ............................................................. 3-32
CAUTION SYSTEM ............................................................................................ 3-34
OVER-REVOLUTION CAUTION SYSTEM ............................................... 3-34
LOW OIL PRESSURE CAUTION SYSTEM ............................................. 3-35
OVERHEAT CAUTION ............................................................................. 3-36
LOW BATTERY VOLTAGE CAUTION SYSTEM ..................................... 3-37
SELF-DIAGNOSTIC SYSTEM ............................................................................ 3-38
PRIORITY/CODE/PATTERN FOR SELF-DIAGNOSTIC
SYSTEM OPERATION .............................................................................. 3-38
CONDITION FOR SELF-DIAGNOSTIC SYSTEM OPERATION .............. 3-40
FAIL-SAFE SYSTEM .......................................................................................... 3-42
PRE-PROGRAMMED VALUE FOR FAIL-SAFE SYSTEM ...................... 3-42
OPERATING HOUR INDICATION SYSTEM ...................................................... 3-43
OIL CHANGE REMINDER SYSTEM .................................................................. 3-44
START-IN-GEAR PROTECTION SYSTEM ........................................................ 3-45
O2 FEEDBACK SYSTEM ................................................................................... 3-46
INSPECTION ...................................................................................................... 3-47
PRECAUTION ON SYSTEM INSPECTION .............................................. 3-47
26-PIN & 34-PIN TEST CORD .................................................................. 3-47
INSPECTION FOR ECM CIRCUIT VOLTAGE ......................................... 3-48
INSPECTION FOR RESISTANCE ............................................................ 3-51
COMPONENT INSPECTIONS .................................................................. 3-53
MULTI-STAGE INDUCTION ..................................................................... 3-63
REMOVAL/INSTALLATION ............................................................................... 3-66
FLYWHEEL ............................................................................................... 3-66
CKP SENSOR ........................................................................................... 3-68
CMP SENSOR ........................................................................................... 3-69
IAC VALVE ................................................................................................ 3-69
OIL PRESSURE SWITCH ......................................................................... 3-70
OCV (Oil control valve) ............................................................................ 3-71
TROUBLESHOOTING ........................................................................................ 3-72
CONTENTS
ENGINE CONTROL SYSTEM 3-1
3
6