Engine Control System; Self-Diagnosis; Checking Procedure (Self-Diagnosis); Inspection Procedure (Using Generic Scan Tool) - Hyundai Seasall S250S Workshop Manual

Fuel System

Engine Control System

Description
1. Engine is hard to start or does not start at all.
2. Unstable idle.
3. Poor drive ability.
✍ NOTICE
▪
Before removing or installing any part, read the
diagnostic trouble code sand then disconnect the
battery negative (-) terminal.
▪
Before disconnecting the cable from battery terminal,
turn the ignition switch to OFF. Removal or connection
of the battery cable during engine operation or while the
ignition switch is ON could cause damage to the ECM.
▪
Checking the generator for the charging state, do
not disconnect the battery '+' terminal to prevent the
ECM from damage due to the voltage.
▪
Charging the battery with the external charger,
disconnect the engine side battery terminals to
prevent damage to the ECM.

Self-diagnosis

If a sensor connector is disconnected with the ignition
switch turned on, the diagnostic trouble code (DTC) is
recorded. In this case, disconnect the battery negative
terminal (-) for 15 seconds or more, and the diagnosis
memory will be erased..

Checking Procedure (Self-diagnosis)

✍ NOTICE
▪
When battery voltage is excessively low, diagnostic
trouble codes can not be read. Be sure to check the
battery for voltage and the charging system before
starting the test
▪
Diagnosis memory is erased if the battery or the
ECM connector is disconnected. Do not disconnect
the battery before the diagnostic trouble codes are
103
completely read and recorded.
Inspection Procedure (Using Generic Scan
Tool
1. Turn OFF the ignition switch.
2. Connect the scan tool to the data link connector
3. Turn ON the ignition switch.
4. Use the scan tool to check the diagnostic trouble
code. .
5. Repair the faulty part from the diagnosis chart
6. Erase the diagnostic trouble code..
7. Disconnect the GST.
✍ NOTICE
When deleting diagnostic trouble code, use scan
tool as possible.
Diesel Control System