(a) Turn the engine switch off.
(b) Disconnect the A54 ECU connector.
(c) Disconnect the O11 low pressure tank valve connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SUSPENSION CONTROL ECU
From 08/2009
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1748: Low Pressure Tank Valve
C1748 - Low Pressure Tank Valve
DESCRIPTION
The low pressure tank valve built into the pneumatic tank assembly opens to store and discharge air in the pneumatic tank according to the signal
from the suspension control ECU.
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