Normal Operation
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
When venting of the rear air suspension system is necessary, the Vehicle Dynamics Module (VDM) sends voltage to the vent solenoid along circuit 421 (PK). This voltage engages the solenoid which then vents the system. The solenoid is provided a ground along circuit 57 (BK). The vent solenoid is part of the air suspension compressor assembly and is serviced as such.
- DTC C1770 Air Suspension Vent Solenoid Output Circuit Failure - With the ignition in the RUN position and during a deflate (vent) activity, if the VDM detects an open, a short to voltage or a short to ground on the vent solenoid output circuit, DTC C1770 will be set.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- VDM
- Air suspension compressor