Suzuki DF 50 Service 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 50 Specifications

General

Engine Type	4-Stroke
Cylinders	3
Displacement	941 cc
Starting System	Electric
Steering	Remote
Engine Type Detail	DOHC 12-Valve
Maximum Output	50 HP
Ignition System	Digital CDI
Alternator	12V 19A
Gear Ratio	2.27:1
Exhaust	Through Prop Hub Exhaust
Trim Method	Power Trim and Tilt
Max Power	50 HP
Alternator Output	12V 19A
Fuel Delivery System	Sequential Multi Point Electronic Fuel Injection
Full Throttle Operating Range	5, 300 - 6, 300 rpm
Engine Oil Capacity	2.7 L
Full Throttle RPM Range	5300 - 6300 RPM
Oil Capacity	2.7 L
Bore x Stroke	72.5 x 76.0 mm (2.85 x 2.99 in.)