DAELIM VJF125 Service Manual - page 88

EMS(Engine Management System)

5-37

16.CHECKING OF MIL(MALFUNCTION INDICATOR LAMP)CIRCUIT

Fault code number is displayed by MIL 

CHECKING CIRCUIT

CHECK PROCEDURE

1) Turn off  ignition key.

2) Check the ESS coupler is loose, or bad.

If there is no problem.

3) Turn on the ignition key. 

4) Check the MIL on  for 3 seconds when turn on the ignition key at the same time. 

If there is no lighting, check the Lamp.

But If the Lamp is working for 3 second,

5) Measure the MIL voltage of wire harness to check ECU.

Measuring terminal :  

B electric wire ~ 

EARTH => Output Voltage: battery voltage

Measuring terminal :  

ECU No.24(L/B :BLUE /BLACK) ~ 

EARTH => Output voltage: 

battery voltage

Remarks : Measuring unit of voltage : Voltage[V]

If the measured voltage is normal,

Check the ‘L/B’ electric wire, ‘B’ electric wire, ‘Br/L’ electric wire to see if they have been broken or

have short- circuited if there is a bad contact  of terminal No. 24 of ECU coupler. 

If there is no problem in wires, ECU has is broken.  

Replace the ECU with new one, and rechecks it.

If the measured voltage is abnormal,

Check the ‘L/B’ electric wire, ‘B’ electric wire, ‘Br/L’ electric wire to see if they have been

broken or have short- circuited.

6) After fault repaired, To erase the memorized fault code in the ECU is refer to how to remove the fault code(5-11)

MALFUNCTION INDICATOR LAMP(MIL)

ECU

24  : MALFUNCTION INDICATOR LAMP OUTPUT