Brake Bleeding Tools & Hydraulic Diagnostics

Why is an Automated Scan Tool Bleed routine required after replacing an Anti-Lock Brake (ABS) hydraulic control unit?

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 Correct IncorrectThe scan tool commands the ABS pump and solenoid accumulator valves to cycle open and closed, purging micro air bubbles trapped in internal valve chambers.

Why is an Automated Scan Tool Bleed routine required after replacing an Anti-Lock Brake (ABS) hydraulic control unit?

• To turn off the check engine light
• To test the speed sensors on the wheels
• To cycle the internal ABS pump and solenoid valves, purging trapped air from internal accumulator galleries
• To calibrate the speedometer