HDS Clear Command

The ECM stores various specific data to correct the system even if there is no electrical power such as when the battery negative terminal or No. 18 (7.5 A) fuse from the under-dash fuse/relay box No. 7 (15 A) fuse from the under-hood fuse/relay box)* are disconnected. Stored data based on failure parts should be cleared by using the "CLEAR COMMAND" of the HDS, if parts are replaced.

The HDS has two kinds of clear commands to meet this purpose. They are DTC clear and ECM reset. DTC clear command erases all stored DTC codes, freeze data, and readiness codes. This must be done with the HDS after reproducing the DTC during troubleshooting. ECM reset command erases all stored DTC codes, freeze data, readiness codes, and all specific data to correct the system.

*: 2005-2006 models