Pre-Charge Pump

Fig 1: Pre-Charge Pump Components

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

1. Cap
2. Bolt
3. Rubber mounting washer
4. Spacer
5. Pre charge pump
6. Bolt
7. Clip
8. Mounting bracket

The pre-charge pump is located adjacent to the brake servo on the inner wing (handed).

At low brake fluid temperature the pre-charge pump removes back pressure from the master cylinder, sucks fluid from the reservoir and adds it directly into the circuit. The pump is always used for DSC, HDC and ETC operation and is controlled by the ABS ECU.