93
ECS Gen. 1
Solenoid valve
relay 3019A
If a fault occurs in a solenoid or sensor, the ECU
automatically puts the system into ʻblockedʼ mode. This
means that the normal automatic levelling function no
longer works.
Blocked mode is activated by removing battery voltage
from the solenoids.
This is done by the ECU changing the supply from pin
(10) from negative to positive. Relay (3019A) is no longer
energised, so battery voltage from ECU pin (15) can not
pass through the relay to the solenoids.
At the same time, ECU pins 3, 4, 5, 6, 7, 8 and 9 become
negative, and ECU pin 29 is positive.
All solenoids are now energised, and the chassis is raised.
In this condition the only way to alter the ride height is to
use the remote control. The ECU will then supply positive
to the solenoids which are not to be energised, and
negative to the solenoids which are to be energised.
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