DAELIM Daystar VL125E Service Manual page 55

EMS(Engine Management System)
CHECKING METHODS BY FAULT CODES
Checking of the Injector circuit
The fault code is displayed by MIL
Checking Circuit
Checking Procedure
1) Turn off the ignition key.
2) Check to see if the injector coupler has come loose or the wire is peeling off.
If there is no problem, measured the resistance of injector.
3)Disassemble the injector coupler and measure the resistance between injector terminals.
The resistance of injector : 14.5±0.7[
Remarks : measuring unit for resistance : resistance ' R ' [
4)If there is no problem, check the continuity between each terminal and ground.
The resistance between each terminal and ground : ∞[
If resistance value is not normal, replace injector with the new one.
5)If the resistance is normal, turns on the ignition key
- If the fuel pump operated for 3 seconds, the power supply relay of injector is normal.
6) Measure between the voltage of coupler.
Measuring terminal :
Measuring voltage : battery voltage – 1.0[V]over
Remarks : Measuring unit of voltage : voltage [V]
5-12
ECU
INJECTOR
Coupler terminal is based on wire harness.
], 20
BLACK/RED electric wire ~
40 : INJECTOR control
39 : FUEL PUMP control
FUEL PUMP RELAY
]
]
ground