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Home >> Porsche >> 1990 >> 928 Automatic >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Testing >> Program Switch Position 19 >> Rear Axle Control Valve

Rear Axle Control Valve

Press "HA" and "LED" buttons. Digital display should be between 4.8-6.0 amps. If readout is okay, go to PROGRAM SWITCH POSITION test. If not, repeat test with engine running. If digital display is still not okay, replace control unit.

NOTE: Remaining tests are not in sequence. PROGRAM SWITCH POSITIONS 24 and 23 must be performed prior to PROGRAM SWITCH POSITIONS 20, 21 & 22.
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