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      09-28-2019, 08:17 AM   #4
Maxlude
First Lieutenant
United Kingdom
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Drives: E90 330D_SE_Man, F90_M5C
Join Date: Apr 2017
Location: UK

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As Phil325i says, most cars today have high pressure ABS pumps and each circuit/valve needs to be bled in a sequence by using a controller connected via the odbc port to cycle them in order. If this is not done, it can leave air in the system and result in a soft brake pedal. You can try triggering the abs by stomping on the brakes on a loose surface but won't be as good as doing it properly
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