2.
Connect the scan tool to the data link connector on the lower crash pad.
Failure of diesel control system components (sensors, ECM, injector, etc.) may result in interruption to the fuel supply or failure to supply the proper amount of fuel for various engine operating conditions. The following situations may be encountered:
Engine is hard to start or does not start at all.
Unstable idle
Poor driveability.
If any of the above conditions occurs, first perform a routine diagnosis including basic engine checks (ignition system malfunction, incorrectengine adjustment, etc.). Then, inspect the diesel control system components with a scan tool.
Before removing or installing any part, read the diagnostic trouble codes and 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.
When checking the generator for the charging state, do not disconnect the battery '+' terminal as doing so may damage the ECM due to voltage.
When charging the battery with the external charger, disconnect the vehicle side battery terminals to prevent damaging the ECM.
The ECM monitors the input/output signals (some signals at all times and the others under specified conditions). When the ECM detects an irregularity, it records the diagnostic trouble code, and outputs the signal to the Data Link connector. The diagnosis results can be read with the MIL or scan tool. Diagnostic Trouble Code(DTC) will remain in the ECM and may be deleted by the scan tool.
If a sensor connector is disconnected with the ignition switch turned on, the diagnostic trouble code (DTC) will be recorded. In this case, disconnect the battery negative terminal (-) for 15 seconds or more, and the diagnosis memory will be erased.
When battery voltage is excessively low, diagnostic trouble codes can not be read. Be sure to check the battery voltage and the charging system before starting the test
Diagnostic memory is erased when the battery or the ECM connector is disconnected. Do not disconnect the battery before the diagnostic trouble codes are completely read and recorded.
Turn OFF the ignition switch.
Connect the scan tool to the data link connector on the lower crash pad.
Turn ON the ignition switch.
Use the scan tool to check the diagnostic trouble code.
Repair the faulty part from the diagnosis chart.
Erase the diagnostic trouble code.
Disconnect the scan tool.
When deleting diagnostic trouble code, use scan tool as possible.
