HB12 Checking Wiring Harness (Circuit 415)

^ The air suspension control module can not activate the left front air spring solenoid valve. In order to determine the cause of this the following actions are required:

^ Electrically disconnect air spring solenoid from vehicle wiring harness connector.

^ Using a voltmeter, connect positive lead to air spring solenoid valve wiring harness connector Circuit 415 and negative lead to Circuit 430k of the same connector.

NOTE: The Air Spring Solenoid Valve Toggle functional test is still being conducted. During this functional test the front ride height of vehicle may lower and the rear ride height may raise.

^ Does voltage reading pulse between zero and battery voltage (check is to be made over a one minute time period)?

YES -- REPLACE left front air spring solenoid valve and REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes

NO -- GO to HB13.