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Executing self diagnosis
Test prerequisites for self-diagnosis
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● The tyres fitted to all wheels must be of the same (approved) size.
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● Conventional brake system including brake light switch and brake lights OK.
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● Hydraulic pipes and connections not leaking (visual check of hydraulic unit, brake cylinders).
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● Wheel bearings and wheel bearing play OK.
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● Connector on control unit (J104) correctly plugged-in (retainer is engaged).
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● Check contacts of ABS or ABS/EDS components for damage and correct seating.
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● ABS relay (J102), ABS hydraulic pump relay (J185) and EDS relay (J310) are correctly plugged in.
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