Diagnostic Aids
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- The following conditions may cause an intermittent malfunction to occur:
- There is an intermittent short or open in the suspension control switch circuit.
- The suspension control switch is in between switch positions.
- A DTC B3577 may set if the suspension control switch terminals are making poor contact to the switch, or if there is a small amount of corrosion on the terminals. Check for these conditions first before attempting to use the diagnostic table, as this may correct the condition.
- The ESC module uses an ignition cycle counter diagnostic approach to set this DTC. This requires the ESC module to detect the malfunction 4 times before setting the DTC. To disable this feature, use a scan tool to clear all DTCs before preforming diagnostic procedures.
- If the DTC is a history DTC, the problem may be intermittent. Using a scan tool, monitor the suspension control switch voltage while moving the wiring and the connectors. This can often cause the malfunction to appear.