User Manual

GM OBD1 Systems
ERASING DTCs
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2. Turn the ignition ON. DO NOT start the engine.
3. Press and release the ERASE
button. A confirmation message
shows on the LCD display.
 If you are sure you want to proceed,
use the UP
and DOWN
buttons, as necessary, to highlight
Yes, then press the ENTER
button to continue.
- If you do not want to proceed, use
the UP
and DOWN
buttons, as necessary, to highlight
No, then press the ENTER
button to exit the erase function.
4. If you chose to erase DTCs, a “One
moment please…” message displays
while the erase function is in progress.
 If the erase was successful, a
confirmation message shows on the
Scan Tool’s LCD display. Press the
SYSTEM MENU
button to return
to the GM Menu.
Due to the differences in computer
systems, the Scan Tool can be
used to erase codes for some
vehicles, while others require
codes to be erased manually. If
the “This vehicle does not support
this function.” screen displays, you
must consult the vehicle’s service
repair manual for procedures to
erase DTCs.
 If the erase was not successful, an
advisory message shows on the
LCD display. Verify that the Scan
Tool is properly connected to the
vehicle's DLC and that the ignition is
ON. Press the ERASE
button
to try again. If the erase process still
does not complete, turn the ignition
OFF, wait 10 seconds, then turn
back ON and repeat steps 2 and 3.
Erasing DTCs does not fix the problem(s) that caused the
code(s) to be set. If proper repairs to correct the problem that
caused the code(s) to be set are not made, the code(s) will
appear again and the check engine light will illuminate as soon
as the problem that cause the DTC to set manifests itself.