Suzuki DF140WT User Manual

ENGINE CONTROL SYSTEM 3-1
ENGINE CONTROL SYSTEM STRUCTURE ____________________ 3-2
SYSTEM STRUCTURE 1 ............................................................................... 3-2
SYSTEM STRUCTURE 2 ............................................................................... 3-3
WIRING DIAGRAM FOR ENGINE CONTROL .............................................. 3-4
COMPONENTS FOR SYSTEM CONTROL _____________________ 3-5
ENGINE CONTROL MODULE (ECM) ........................................................... 3-5
ECM CONNECTOR / TERMINALS LAYOUT ................................................. 3-6
ECM INTERNAL STRUCTURE...................................................................... 3-7
SENSOR AND SWITCH ................................................................................. 3-8
IGNITION SYSTEM ________________________________________ 3-12
IGNITION CONTROL SYSTEM ..................................................................... 3-12
ELECTRONIC FUEL INJECTION SYSTEM_____________________ 3-14
FUEL INJECTION CONTROL SYSTEM ....................................................... 3-14
FUEL DELIVERY SYSTEM COMPONENTS ................................................. 3-16
FUEL PUMP CONTROL SYSTEM ................................................................ 3-19
AIR INTAKE COMPONENTS ......................................................................... 3-20
IDLE AIR CONTROL SYSTEM ...................................................................... 3-21
CAUTION SYSTEM _______________________________________ 3-23
OVER-REVOLUTION CAUTION SYSTEM .................................................... 3-23
LOW OIL PRESSURE CAUTION SYSTEM................................................... 3-24
OVERHEAT CAUTION SYSTEM ................................................................... 3-25
LOW BATTERY VOLTAGE CAUTION SYSTEM ............................................ 3-26
SELF-DIAGNOSTIC SYSTEM _______________________________ 3-27
PRIORITY / CODE / PATTERN FOR SELF-DIAGNOSTIC
SYSTEM OPERATION ................................................................................... 3-27
CONDITION FOR SELF-DIAGNOSTIC SYSTEM OPERATION ................... 3-29
FAIL-SAFE SYSTEM ______________________________________ 3-30
PRE-PROGRAMMED VALUE FOR FAIL-SAFE SYSTEM ............................ 3-30
OPERATING HOUR INDICATION SYSTEM ____________________ 3-31
OIL CHANGE REMINDER SYSTEM __________________________ 3-32
START-IN-GEAR PROTECTION SYSTEM______________________ 3-33
O
2
FEEDBACK SYSTEM ___________________________________ 3-34
INSPECTION_____________________________________________ 3-35
PRECAUTION ON SYSTEM INSPECTION ................................................... 3-35
44-PIN TEST CORD ....................................................................................... 3-35
INSPECTION FOR ECM CIRCUIT VOLTAGE ............................................... 3-36
INSPECTION FOR RESISTANCE ................................................................. 3-38
COMPONENT INSPECTIONS ....................................................................... 3-39
TROUBLESHOOTING _____________________________________ 3-45
REMOVAL / INSTALLATION ________________________________ 3-51
FLYWHEEL..................................................................................................... 3-51
CKP SENSOR / CMP SENSOR ..................................................................... 3-53
OIL PRESSURE SWITCH .............................................................................. 3-54
ENGINE CONTROL SYSTEM
CONTENTS
3

Suzuki DF140WT Specifications

General

Brand	Suzuki
Model	DF140WT
Category	Outboard Motor
Language	English