HD25 Component Check (Solenoid Valve Operation Check)

^ Determine if the left rear air spring solenoid valve is operational the following actions are required:

^ Make sure that air line and vehicle electrical wiring harness connector are connected to the removed left rear air spring solenoid valve.

^ Release STAR test button so that it remains in the HOLD position after code 28 has been displayed for at least 5 seconds.

^ Is left rear air spring solenoid valve passing air through It?

NO -- DEPRESS STAR test button down so that it remains in the TEST position. INSTALL a new left rear air spring solenoid valve, REINFLATE air spring before setting weight on tire and REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes

YES -- DEPRESS STAR test button down so that it remains in the TEST position. REPLACE shock fluid mist filter and refer to Strut/Service and Repair procedures. REPEAT Service Bay Diagnostics Reading and Clearing Diagnostic Trouble Codes after service is made.