BSW-ECU INSPECTION


caution
  • Do not repair the rear bumper assembly around the BSW-ECU. If yes, the radar will reflect irregularly to cause the BSW/RCTA system to work incorrectly.
caution
  • To check the ECU accurately, keep away 4 meters or more from the vehicle (There should not be any metal objects around the vehicle).
Check the BSW-ECU according to the procedure below after any of the following operations is performed:

Inspection procedure

1.Prepare three approx. 0.5 mm-thick flat aluminium panels, which measure 150 mm×150 mm×approx. 210 mm (panels can be thinner if not distorted). Make a triangular pyramid by using these panels.
note
  • To build the pyramid, apply adhesive tape from outside. Otherwise, the radar will reflect irregularly.
  • Be careful not to distort the aluminium panels.
  • Be careful not to damage the inside of the BSW target (triangular pyramid) as the radar reflects inside it.
2.



Place the BSW target (triangular pyramid) as shown (2045 mm away laterally from the centre of vehicle, 2344 mm behind from the centre of the rear axle).


Place the front face of the BSW target (triangular pyramid) as shown. It should be 750 mm perpendicularly away from the floor. Its front face should be parallel to the front face of the BSW-ECU.
note The vehicle should be parked on flat surface with its tyre inflation pressure within the specification. Empty the luggage compartment and the vehicle should be at an unladen weight.
3.Connect the M.U.T.-III.
4.Select the M.U.T.-III screen menu as follows.
(1) Select "BSW."
(2) Select "Special function."
(3) Select "Test."
(4) Select "Radar detecting angle check."
5.No action should be taken when the radar recognition angle is within ± 3 °.
6.When it is not within ± 3 °, install the BWS-ECU again. Then repeat the check process.