Normal Operation
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The ABS module receives the brake fluid level information and the brake pedal position (BPP) switch information over the high-speed controller area network (HS-CAN) bus. The PCM provides the BPP switch information and the instrument cluster provides the brake fluid level information.
- DTC C1446 Brake Fluid Level Low/Brake Switch Circuit Failure - If during normal operation or the on-demand self test the ABS module does not receive the brake fluid level message and/or the BPP switch message, or if the BPP message is inconsistent with other sensor information, DTC C1446 will be set.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Brake fluid level
- BPP switch
- Instrument cluster
- PCM