Without Scan Tool
CLEAR DTCAny deleted DTCs (Diagnostic Trouble Code) can no longer be accessed. However, the DTC can be reproduced (which may involve a test drive or simply turning on the ignition depending on the fault) if the fault needs to be studied or was deleted by mistake.
1. Short the Diagnosis Connector C-34 terminal 3 to terminal 4 or 5 (ground).
^ If it is flashing and the flash is 0.5 seconds ON and 4 seconds OFF without interruption, this means that there is no DTC. The DTCs are already cleared.
2. Wait until the lamp is flashing.
3. Press on the brake pedal every two seconds six or more times.