5-30
EMS(Engine Management System)
CHECK PROCEDURE
5) If the measured resistance and continuty is abnormal.
Replace ISA with the new one, and recheck.
6) If resistance and continuty is normal, connect the coupler of ISA.
7) Turn on ignition key
8) Measure ISA voltage of wire-harness to check ECU.
Measuring terminal : B/R electric wire ~ EARTH
Output voltage of ISA : Battery Voltage [V]
Remarks : Voltage measuring unit : Voltage [V]
If the measured voltage is normal,
Check the ‘B/R’ electric wire, ‘L/G’ electric wire, ‘W/R’ electric wire to see if they have been broken or
have short- circuited if there is a bad contact of terminal No. 33, No. 39 of ECU coupler.
If there is no problem in wires, ECU has broken down.
Replace ECU with the new one, recheck.
If the measured voltage is abnormal,
Check the ‘B/R’’ electric wire, ‘L/G’ electric wire, ‘W/B’ electric wire to see if they have been
broken or have short- circuited.
9) After fault repaired, to erase the memorized fault code in the ECU is refer to how to remove the fault code.
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