(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
Up to 08/2009
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1751: Compressor Relay Coil Malfunction
C1751 - Compressor Relay Coil Malfunction
DESCRIPTION
The signal from the suspension control ECU turns on the AIR SUS relay, and then the height control compressor motor starts.
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