Brake Booster Vacuum Sensor (3.0L Petrol Vehicles Only)

When the brake booster vacuum is low the ABS control module will raise the braking system's hydraulic pressure to compensate for the brake booster's vacuum deficiency. This function will operate until the brake booster's vacuum has been replenished. See Brake Vacuum Assist above.

The brake booster vacuum sensor, mounted on the brake booster, provides vacuum pressure information to the ABS module. The sensor monitors the vacuum pressure in both chambers of the brake booster, providing vacuum pressure values to the ABS module via hard wired connections.

The brake booster vacuum sensor receives a power feed from the ABS module, which also provides a ground path for the sensor.