The ECS is the abbreviation for "Electronic Control Suspension". This ECS system automatically controls the height of a vehicle level and the damping force of shock absorbers according to road condition. So it improves riding comfort and steering stability. When the vehicle leveling is performed, the compressor presses the air and makes it into high-pressure air. And it is supplied to each air-spring or the reservor. And the ECS ECU controls each air-spring valve in order to charge the air into each air-spring.
The ECS ECU checks a air-spring valve for a normal operation and if it is detected as a open or short circuit, this DTC is set.
Item
Detecting Condition
Possible cause
DTC Strategy
Monitoring a air-spring valve
Open or short in the air-spring valve circuit
Faulty air-spring valve(in the solenoid valve ASSAY)
Threshold value
Short to battery side: When the valve is ON, the battery voltage is detected at the Low side
Short to ground side/ open: When the valve is OFF, the zero voltage is detected at the Low side
Fail-Safe
Airspring
Inhibition of the upward leveling
CDC
damper
-