Technician A says that a scan tool may be required to retrieve data and diagnostic trouble codes from some antilock braking systems. Technician B says that a jumper wire can be used to retrieve diagnostic codes on some antilock braking systems. Which technician is correct?

Question

Quizplus · Accepted Answer

Both statements are correct. Modern vehicles often require a scan tool to access the diagnostic trouble codes from the antilock braking system (ABS), but on some older vehicles, it is possible to use a jumper wire to initiate a diagnostic mode that flashes codes via the dashboard warning lights.

Technician a Says That a Scan Tool May Be Required