Normal Operation and Fault Conditions
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2018 Lincoln MKZ, 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, and 2018 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
Some vehicles are equipped with a camshaft driven vacuum pump to supply vacuum to the brake booster. All other engines use the vacuum generated by engine operation to supply vacuum to the brake booster.
The ABS module uses a vacuum sensor to monitor the brake booster vacuum. The vacuum pump is expected to produce at least 600 mBar (18 In-Hg). A leak in a vacuum hose, brake booster or one of the seals on the brake booster or vacuum pump prevents the brake booster from achieving the required amount of vacuum. Damage or and internal failure prevents the vacuum pump or the engine from operating at peak capacity.
PPT AH ABS MODULE DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C1015:7A | Vacuum Supply: Fluid Leak or Seal Failure | Sets when the ABS module detects a decrease in brake booster vacuum without brake system activation. |
| C1015:7B | Vacuum Supply: Low Fluid Level | Sets when the ABS module detects the brake vacuum pump or engine is unable to produce the vacuum necessary for brake system operation. |