BMW X5: Removing And Installing/Replacing DSC Yaw Sensor

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).

IMPORTANT: Do not kink floor panelling under any circumstances!

Necessary preliminary tasks:

• Remove right front seat.
• Lift floor panelling and fold back to one side

Remove floor inlay (2).

Unfasten screws.

Tightening torque, see 34 51 2AZ in 34 51 SLIP CONTROL SYSTEM (DSC)

Disconnect plug connection and remove yaw sensor (1).

Fig. 58: Identifying Floor Inlay And Screws

Carry out calibration/adjustment of DSC sensor.

INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE

NOTE: The Service function Initial operation of Dynamic Drive must be carried out after:

• Work on the Dynamic Drive system which involved opening hydraulic lines
• Replacement / Programming / Coding Dynamic Drive control unit
• Replacement lateral acceleration sensor
• Parameters and zero point of new sensors have been learn

Bleeding power steering:

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.

NOTE: To avoid mix-ups when filling with hydraulic fluid, mark the fluid reservoirs or their caps with identification marks.

CHF Pentosin CHF11S

Fig. 59: Identifying CHF Pentosin CHF11S

1. Thoroughly clean fluid reservoir and its immediate surroundings
2. Check and correct fill level

NOTE: The fill level can come to rest above the "MAX" mark when the engine is at normal operating temperature. This is dictated by the design in that the marking on the dipstick is referred to a fluid temperature of 20ºC. With the engine at normal operating temperature (approx. 50-60ºC fluid temperature) adjust a fill height 15 mm above the "MAX" mark. Do not under any circumstances draw off the fluid to the "MAX" mark when the engine is at normal operating temperature.

3. Start engine
4. Turn steering wheel left and right twice in each case up to full lock; if necessary, top up hydraulic fluid (e.g. if hydraulic system is completely drained)
5. Move steering wheel to straight-ahead position and turn off engine
6. Check and correct fill level with engine stopped
7. Check hydraulic system for leaks

Performing initial operation with test run:

WARNING: Danger of injury! Vehicle executes heavy rolling motions during initial operation! Therefore observe the following instructions without fail:

• Do not allow any persons to remain in the vehicle or directly on the vehicle.
• Keep the vehicle doors closed.
• Maintain a safety distance around the vehicle of 1 m to persons, objects, walls etc.
• Vehicle must be standing horizontally with all wheels on a firm surface.
• Do not under any circumstances carry out initial operation on a lifting platform, wheel alignment analyzer or similar!
• Avoid heavy loads.

1. Check load; if necessary, remove load from the vehicle
2. Bring engine up to operating temperature

NOTE: Hydraulic fluid temperature must be between 50ºC and 70ºC (vehicle at normal operating temperature)

3. Connect vehicle to BMW DIS or MoDiC diagnostic hardware.
4. Start initial operation in SERVICE FUNCTIONS. Follow instructions in DIS.
5. Check and correct fill level with engine stopped

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