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What does it mean when the ECAS warning light is on?

1 Answers
EmilyMarie
07/30/25 10:50am
ECAS fault indicates a malfunction in the air suspension system, which requires repair. The following is relevant information about ECAS: 1. Air Suspension System: The Electronically Controlled Air Suspension (ECAS) for buses/trucks consists of an ECAS electronic control unit, solenoid valves, height sensors, air springs, and other components. The height sensors detect changes in vehicle height, the electronic control unit receives input signals, determines the current vehicle status, and activates the solenoid valves to regulate inflation/deflation of each air spring. 2. ECAS: Traditional air suspension control uses mechanical height valves that maintain constant ride height by adjusting air spring inflation/deflation through valve opening/closing.
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