2.
Connect the scan tool to the data link connector on the lower crash pad.
If the disel control system components (sensors, ECM, injector, etc.) fail, interruption to the fuel supply or failure to supply the proper amount of fuel for variousengine operating conditions will result. The following situations may be encountered
Engine is hard to start or does not start at all.
Nstable idle.
Poor driveability.
If any of the above conditions are noted, first perform a routine diagnosis that includes basic engine checks (ignition system malfunction, incorrectengine adjustment, etc.). Then, inspect the disel contorl system components with a scan tool.
Before removing or installing any part, read the diagnostic trouble codesand 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 operationor while the ignition switch is ON could cause damage to the ECM.
Wchecking the generator for the charging state, do not disconnect the battery '+' terminal to prevent the ECM from damage due to the voltage.
Wcharging the battery with the external charger, disconnect the vehicleside battery terminals to prevent damage to the ECM.
The ECM monitors the input/output signals (some signals at all times and theothers 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) is recorded. In this case, disconnect the battery negative terminal (-) for 15 seconds or more, and the diagnosis memory will be erased.
When attery 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 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.
