Honda SH125 Manual page 93

FUEL SYSTEM (Programmed Fuel Injection)
2. Injector Power Input Line Inspection
Measure the voltage between the wire harness
side 2P connector terminal and ground with the
ignition switch turned to ON.
Connection: Black/white (+)
-
Ground
(-1
Does
the battery voltage exit?
NO
-
Open circuit in BlacWwhite wire.
YES
-
GO TO STEP 3.
3. Injector Signal Line Open Circuit Inspection
Connect the test harness between the ECM con-
nectors (page 5-9).
Check for continuity between the test harness
terminal and wire harness side 2P connector ter-
minal.
Connection: #20
-
Pinklblue
Is there continuity?
NO
-
Open circuit in PinMblue wire.
YES
-
GO TO STEP 4.
4.
Injector Signal Line Short Circuit Inspection
Disconnect the test harness.
Check for continuity between the wire harness
side 2P connector terminal and ground.
Connection: Pink/blue
-
Ground
Is there continuity?
YES
NO
-
Short circuit in PinWBlue wire.
-
Replace the throttle body/ECM assem-
bly with a new one, and inspect again.
h
INJECTOR 2P
CONNECTOR
I
PinMblue