90CS Quattro V6-2.8L (AFC) (1995)
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Same tire sizes (as specified) on all four wheels; tires inflated to specified pressures.
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Conventional brake system functioning properly, including Brake Light Switch, Left and Right Brake Lights.
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No leaks from hydraulic connections or lines (visual check of hydraulic unit, brake cylinder).
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Wheel bearing and wheel bearing play OK.
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Ground connection for ABS Return Flow Pump V39 on hydraulic unit OK
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ABS Return Flow Pump Relay - J105 and ABS Solenoid Valve Relay - J106 correctly connected.
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Harness connector on ABS Control Module - J104 correctly connected (positive engagement).
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When working with the Scan Tool VAG 1551, the test box VAG 1598 must not be connected to the ABS Control Module - J104.
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Function of manually engaged differential lock OK (Rear Differential Lock Indicator Light - K46 lights up when engaged and goes out completely
when switched off).
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Differential lock not engaged.
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All fuses OK - per wiring diagram
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Supply voltage OK (at least 10.5 V)
Required technical information
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Appropriate wiring diagram
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Technical Bulletin, Group 45, No. 94-01, "ABS, checking function with VAG 1710"
