Question

what precaution should be taken before servicing abs that uses a high pressure accumulator?
discharge the accumulator
remove the air bag fuse
turn off the air suspension system
drain the fluid before service
question 12
1 pts
which of these is a 3 channel antilock brake system?
a
b
c
all of these are 4 channel systems

Explanation:

First Question (Precaution for ABS with High - Pressure Accumulator)

For an ABS with a high - pressure accumulator, the high - pressure in the accumulator can be dangerous during servicing. Discharging the accumulator relieves this pressure. Removing the air bag fuse is related to airbag systems, not ABS accumulator servicing. Turning off the air suspension system is for air suspension, not ABS. Draining fluid before service is not the key precaution for a high - pressure accumulator (the main issue is the pressure in the accumulator). So the correct precaution is to discharge the accumulator.

In a 3 - channel ABS, typically, there are three hydraulic channels. Usually, one channel is for the rear wheels (either a single channel for both rear wheels in a rear - wheel - drive - like setup for ABS) and two channels for the front wheels (one per front wheel). To identify the 3 - channel system, we analyze the valve and channel configuration. Without seeing the detailed diagram, but based on typical 3 - channel ABS design, if option A (or the relevant option based on the diagram's valve/channel layout) has a configuration where there are three distinct channels (e.g., two for front, one for rear), it would be the 3 - channel system. Assuming the diagram for option A shows a 3 - channel layout (e.g., two front - wheel channels and one rear - wheel channel), then option A is the 3 - channel system.

Answer:

Discharge the accumulator

Second Question (3 - Channel Antilock Brake System)