Honda SH125 Manual page 105

FUEL SYSTEM (Programmed Fuel Injection)
DTC 12-1 (FUEL INJECTOR)
NOTE:
Before starting the troubleshooting, check the
injector 2P connector for loose contacts or cor-
roded terminals, and recheck the DTC.
1. Injector System Inspection
Erase the self-diagnostic memory to reset the
ECM (page 5-8).
Start the engine and check the injector with the
HDS.
Is the DTC 12- 1 indicated?
YES
-
Loose or poorly connected injector
Temporarily failure; the system is
2P connector.
normal.
NO
-
GO TO STEP 2.
2. Injector Resistance Inspection
Remove the luggage box (page 2-5).
Turn the ignition switch to OFF.
Disconnect the injector 2P connector.
Measure the resistance between the injector ter-
minals.
Standard: 11.1
-
12.3
R
(2OoC/68"F)
Is the resistance within 11.1
-
12.3 0 (20°C/
68
O F ) ?
NO
-
Faulty injector.
YES
-
GO TO STEP 3.
3. 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 (-)
Does the battery voltage exit?
NO
-
Open circuit in BlacWwhite wire.
YES
-
GO TO STEP 4.
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