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.
The Vehicle Dynamics Module (VDM) engages the air compressor relay by providing voltage to the relay along circuit 420 (DB/YE). Ground for the relay is provided along circuit 57 (BK). Fused battery voltage is supplied from Battery Junction Box (BJB) fuse 112 (30A) to the relay along circuit 1053 (LB/PK). When the VDM engages the relay, the fused battery voltage travels through the relay to the air compressor along circuit 538 (GY/RD). The compressor is provided a ground path along circuit 57 (BK).
- DTC C1830 Air Compressor Relay Circuit Failure - With the ignition in the RUN position and during a deflate (vent) or inflate (pump) activity, if the VDM detects an open, short to ground or short to voltage on circuit 420 (DB/YE), DTC C1830 will be set.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Air compressor relay
- Air compressor
- VDM