Test E: DTC C1770 - Air Suspension Vent Solenoid Output Circuit Failure

Pinpoint Test E: DTC C1770 - Air Suspension Vent Solenoid Output Circuit Failure
Refer to Vehicle/Diagrams, Vehicle Dynamic Suspension for schematic and connector information.

Normal Operation
When venting of the rear air suspension system is necessary, the air suspension module 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 air suspension module 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
^ Air suspension module
^ Air suspension compressor

E1:

E1 (Continued)-E3:

E4-E5: