Self-Diagnostic Code "4 - 3" Fuel Injector - Suzuki DF70A Service Manual

Self-Diagnostic Code "4 – 3" Fuel Injector
Wiring Diagram
Troubleshooting
Step
1 1) Using a sound scope, check that each injector has an
operating sound when the engine is cranking.
Do all injectors make an operating sound?
2 1) Check the fuel injector, the wiring connection and the
wire harness of the fuel injector not making the operating
sound.
Are all of the above OK?
3 1) With the ignition switch "OFF", disconnect the connector
from the fuel injector.
2) Check the voltage at "Gr" wire terminal with the ignition
switch "ON".
Is the voltage 12 V (battery voltage)?
4 1) Disconnect the ECM connector with the ignition switch
"OFF", and check all of the injectors for resistance.
Refer to "Resistance Check" in Section 1C (Page 1C-7).
Is the resistance 10 – 14
12 V (From main relay)
1
#1
O/B
#2
B/Br
#3
R/W
#4
Lg
1. Fuel injector
Action
Ω
for each injector?
For step 3
Gr
Engine General Information and Diagnosis:
ECM
C
P
U
I9J011110040-04
Yes
Fuel injector and its
circuit are in good
condition.
Substitute a known-
good ECM and recheck.
Go to step 4.
Substitute a known-
good ECM and recheck.
I9J011110023-02
1A-31
Z9J0111104011
No
Go to step 2.
Faulty injector or its
circuit.
Power circuit open.
Faulty injector or its
circuit.