Attention! Observe safety precautions for protection against electrostatic discharge. Use grounding straps.
Removing the ECU system «ABS/ASC+T» And «DSC» must be done in the following order. Read information from fault memory and print fault codes. On vehicles with engine «M62» And «N62» remove the left headlight and control panel.
If necessary, disconnect additional heating pump. Disconnect the loop and take the additional pump to the side, fixing it on the body. Unlock the AL by sliding its latch and remove the AL by pulling it vertically upwards.
Remove bolts (1, fig. 11.75) and disconnect the computer (2) from GA. The bolts must be replaced.
ECU system installation «ABS/ASC+T/DSC» to the hydraulic unit should be carried out in the reverse order, while it is necessary to visually check the sealing surface of the computer (1, fig. 11.76) ECU and GA for damage. Clean sealing surfaces (1), do not use sharp-edged tools or aggressive cleaning agents. Check contact pads (2) for corrosion and damage. When damage is detected on the elements (1) And (2) GA needs to be replaced.
To avoid damage to the contact pins of the AL-ECU, insert the AL into the ECU, keeping it strictly perpendicular to the ECU. Carefully fit the ECU onto the GA. Avoid distortion of the excitation coils. ECU housing edge (1, fig. 11.77) must slide over the ledge (2) GA.
Press the computer to the GA and evenly screw in new bolts (1 and 2, fig.11.78), slowly tightening them until the ECU body evenly adheres to the HA. Screw in new bolts (1–6) until the contact surfaces are in contact, without tightening them completely. Tighten the computer mounting bolts with a torque wrench to 2.9 Nm (0.29 kgf·m) in the sequence shown in Figure 11.78. Check the fixation of the ECU loop.
After installing a new ECU, you need to code it. If there is a system «DSC» in addition, coordinate the steering wheel position sensor using the system «DIS».