used by service technicians to verify repair was performed properly
and after clearing diagnostic trouble codes.
Mode $08 - This Special Control Mode requests control of the
on-board system, test, or component bi-directionally (where
applicable). This mode is manufacturer specific.
Mode $09 - Reports vehicle information. This information includes
vehicle VIN number and calibration information stored in the vehicle
ECUs.
Mode $0A -- Request Emission-Related Diagnostic Trouble
Codes with Permanent Status. This mode is required for all
emissions-related DTCs. The presence of permanent DTCs at an
inspection without the MIL illuminated is an indication that a proper
repair was not verified by the on-board monitoring system.
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