Suzuki DF 40 User Manual

3-41 ENGINE CONTROL SYSTEM
TROUBLESHOOTING
A
Before starting troubleshooting, read and follow the “PRECAUTION ON SYSTEM INSPECTION”
section on page 3-33.
In this section, troubleshooting procedures are based on the assumption that “low pressure fuel system” and
“mechanical components (power unit, lower unit, etc.)” are normal.
NOTE:
For troubleshooting of “Starter motor will not run”, see page 4-7.
CHART1 : SELF-DIAGNOSTIC CODE “3-4”
START
< Ignition switch “ON” >
Check “D2” terminal voltage.
Is result OK? (See page 3-34.)
< Ignition switch “ON” >
Check “D7” terminal voltage.
Is result OK? (See page 3-34.)
Possible cause :
• ECM failure
• Wire continuity/connection failure
YES
YES
ECM failure
NO
MAP sensor failure
NO
CHART2 : SELF-DIAGNOSTIC CODE “4-2”
START
< Ignition switch “OFF” >
Check CKP sensor resistance.
Is result OK? (See page 3-35.)
Possible cause :
• ECM failure
• Wire continuity/connection failure
YES
CKP sensor failure
NO
NOTE:
• It will be possible to start engine if one CKP sensor has
failed.
• No spark or injection signal will be supplied to the cylinder
corresponding to the faild CKP sensor.

Suzuki DF 40 Specifications

General

Displacement	941 cc
Starting System	Electric
No. of Cylinders	3
Steering	Remote
Gear Ratio	2.27:1
Alternator Output	12V 19A
Engine Type	4-Stroke, DOHC
Maximum Output	40 hp
Fuel System	Multi-Point Sequential Electronic Fuel Injection
Shaft Length	S: 381 mm, L: 508 mm
Oil Capacity	2.7 L