To access vehicle information related to emissions compliance, which mode should a technician employ?

To access vehicle information related to emissions compliance, technicians utilize Mode 9. This mode is specifically designed for reading vehicle emissions-related data, which includes information about emission-related diagnostic trouble codes and allows for the retrieval of vehicle information regarding emissions compliance.

Mode 8 is primarily focused on bi-directional controls, which relate to operational or functional tests of various vehicle components but do not directly provide emissions compliance information. Mode 10 is dedicated to manufacturer-specific data and, while it may include emissions-related codes, it is not the primary mode for accessing compliance information. Mode 6 is used to access On-Board Diagnostic (OBD) monitor test results and is often employed for looking into specific tests within the emissions system but does not directly present compliance statuses in the same manner as Mode 9.

In summary, Mode 9 is the appropriate choice for accessing emissions compliance data, offering a direct link to important information about a vehicle’s emissions status and compliance.