How To Read And Erase Diagnostic Trouble Codes

WARNING: This page is about a different car, the 2004 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991958: Scan tool (MUT-III sub assembly)
MB991824: V.C.I.
MB991827: MUT-III USB cable
MB991910: MUT-III main harness A

CAUTION: To prevent damage to scan tool, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool.

NOTE: If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool does not display.

Connect scan tool to the data link connector.

Fig 1: Connecting Scan Tool To The Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Turn the ignition switch to the "ON" position.
Select "Interactive Diagnosis" from the start-up screen.
Select "System Select."
Choose "TCL" from the "POWERTRAIN" tab.
Select "Diagnostic Trouble Code."
If a DTC is set, it is shown.
Choose "DTC erase" to erase the DTC.