Question

Tech A says that a scan tool may be required to bleed air from the ABS. Tech B says that some vehicles have a high-pressure accumulator that may need to have the pressure bled off before hydraulic brake repairs are made. Who is correct?​

Answer 1

Both Tech A and Tech B are correct; a scan tool may be required to bleed air from the ABS, and high-pressure accumulators in some vehicles need to have the pressure bled off before hydraulic brake repairs.

Step-by-step explanation:

The question is about the procedures involved in the maintenance or repair of the brake system, particularly related to the Anti-lock Braking System (ABS). Tech A says that a scan tool may be required to bleed air from the ABS. This is correct because modern vehicles with ABS may require the use of a scan tool to cycle the ABS valves and pump to ensure all air is expelled from the system. Tech B says that some vehicles have a high-pressure accumulator that may need to have the pressure bled off before hydraulic brake repairs are made. This is also correct, as any stored pressure in the accumulator could be dangerous and must be relieved before service. Therefore, both technicians are correct in their statements.