Perform Erase Codes function only after systems have
been checked completely and DTCs have been written
To erase codes from the vehicle computer:
1. Set the ignition to Key On and Engine Off. Do NOT start the
vehicle. The engine should not be running.
2. Press and hold the ERASE key for 3 seconds then release, or
select Erase Codes from Diagnostic Menu; press ENTER.
one of the following options.
To proceed with the operation: Press ENTER for YES.
To cancel the operation and return to the Diagnostic Menu:
Press BACK for NO.
The Tool will automatically perform the Read Codes function after
erasing codes. The Tool will then indicate the number of codes
If after erasing codes a DTC returns, the problem has
MIL (Malfunction Indicator Lamp) status indicates if the vehicle computer
is telling the MIL to illuminate when the engine is running.
MIL ON indicates that the Malfunction Indicator Lamp should
MIL OFF indicates that the Malfunction Indicator Lamp should
I/M Monitors (Emissions)
Inspection / Maintenance Monitors provide a snapshot of the Emission
System operations by indicating that the I/M Monitors are Ready or Not
Ready. For an I/M Monitor to be Ready, the vehicle must have com-
pleted a drive cycle (been driven long enough under proper conditions
to have completed a drive cycle). A Monitor must be listed as Ready to
pass an emissions test. If an I/M Monitor is Not Ready, it is because a
drive cycle has not completed.