Without Scan Tool

HOW TO CLEAR DIAGNOSTIC TROUBLE CODES WITHOUT A SCAN TOOL

Diagnostic trouble codes can be cleared by the Memory Erasing Procedure contained within the Self Diagnostic Procedure Chart or by cycling the ignition key as explained in Retention of Diagnostic Results.
Diagnostic trouble codes will also be erased by disconnecting the negative battery terminal.




Self Diagnostic Procedure




Retention of Diagnostic Results

The diagnostic results will remain in E.C.U. memory until the starter is operated fifty times after a diagnostic item has been judged to be malfunctioning. The diagnostic result will then be cancelled automatically. If a diagnostic item which has been judged to be malfunctioning and stored in memory is again judged to be malfunctioning before the starter is operated fifty times, the second result will replace the previous one. It will be stored in E.C.U. memory until the starter is operated fifty times more.