Brake Fluid Pressure Sensor/Switch: Service and Repair

Remove/Install ESP Brake Pressure Sensor






DANGER:
- Risk of explosion from hydrogen gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of Injury to eyes and skin suffering caustic burns from battery electrolyte or from contact with damaged lead acid batteries.
- No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Pour battery electrolyte only into suitable and appropriately marked containers

1 Disconnect ground cable of battery

CAUTION:
- Model 209: Do not connect quiescent current retention unit as this may cause interference in the control module.

DANGER:
- Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid.
- Pour brake fluid only into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

2 Extract brake fluid from the brake fluid reservoir

CAUTION:
- See notes on brake fluid
- See notes on repairs to brake system

3 Disconnect plug from ESP brake pressure sensor (B34)
4 Unscrew ESP brake pressure sensor (B34) from stepped tandem brake master cylinder (1)

NOTE: Collect brake fluid which flows out with cloth.

5 Install in the reverse order
6 Bleed brake system
7 Read diagnostic trouble code memory and erase
8 Perform basic programming

NOTE: If the quiescent current retention unit was not connected.