Chart E3 Valve Cycling During Normal Stops

WARNING: This page is about a different car, the 1988 Buick Riviera and 1988 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.

This chart should be used as indicated by FUNCTIONING CHECK chart. If valve is heard cycling during normal braking, possible cause is an erroneous wheel sensor signal.
Low wheel sensor signal can be mistaken by EBCM, as wheel lock-up. EBCM will then engage ABS and signal valve to reduce pressure to wheels. This condition can occur without EBCM setting a trouble code.

Fig 1: Valve Cycling During Normal Stops Schematic

Fig 2: Flow Chart E3, Valve Cycling During Normal Stops

Fig 3: CHART E3 VALVE CYCLING DURING NORMAL STOPS