Aftermarket May 2022

BY Damien Coleman, Product Manager/ EBI Specialist at Snap-on M ost modern vehicles will have some form of advanced driver assistance system (ADAS) fitted to them, such as forward- facing camera, adaptive cruise control, rear view camera, etc. If a sensing component is replaced or disturbed. a procedure must be carried out to ensure the component is correctly aligned for accurate operation. In this article, the procedure for static calibration of the rear camera on a 2021 Mercedes Sprinter will be described. Although the process may seem daunting initially, it is quite straightforward once the correct equipment is used. The procedure will take approximately 20 minutes and should be carried out in an area with adequate light and space around the vehicle. Step 1 involves finding the centre point of the front axle in the vertical axis. This is made simpler by using a laser. Mark the floor at the centre point of the wheel. Please refer to Fig.1. In Step 2, we must find the end point of the vehicle. This vehicle is fitted with a Tow-Hitch so a plumb line was attached to the ball of the hitch and allowed to hang. The point the plumb line touches the floor was marked. Please refer to Fig.2. Targets In Step 3, the targets can be placed on the floor behind the vehicle. There are three targets which are numbered and have directional arrows to ensure correct placement. Please refer to Fig.3. The centre line of the target must be located 40cm or 400mm from the end point of the vehicle. Again, a laser is used to ensure the target is in-line with the rear if the vehicle. The laser should intersect the centre line of all three targets. In Step 4, the laser must be used to find the centre point of the vehicle. The beam must intersect the centre point of the manufacturer badge and the Rear Camera lens. Please refer to Fig.4a and Fig.4b. Measure a distance of 400mm/40cm from the end of the vehicle to the centre of the middle target Now, for Step 5, referring to Fig.5a and Fig.5b, align targets with centre line of vehicle, referring to the rear Door Badge. Once again ensure the centre of each target is correctly aligned. This line will be used for the final measurement so the laser can be left in this position. For Step 6, you must centralise the targets. Please refer to Fig.6a and Fig.6b. A measuring tape must now be used to measure the distance from the centre point of the front axle (Step 1) to the centre point of the targets (Step 6). In Step 7, measure the distance from the centre of the front axle to the centre of the targets. Please refer to Fig.7a and Fig.7b. Record the measurement as this must be input into the diagnostic scan tool during the alignment 32 AFTERMARKET MAY 2022 TECHNICAL/SNAP-ON www.aftermarketonline.net MERCEDES SPRINTER 907 REAR CAMERA CALIBRATION This month, Damien is showing you how to straighten up a rear camera on a Mercedes procedure. Fig.8a, Fig.8b and Fig.8c show a view of the vehicle from the rear. Meanwhile, Fig.9 shows an overhead view of the target placement. Diagnostic procedure Now that we have the target correctly aligned and the measurement from the front axle to the target measured, we can connect the scan tool to the vehicle and carry out the diagnostic procedure. Please refer to Fig.10a and Fig.10b. Then, connect the scan tool to the data link connector and select ‘back-up camera’. Please refer to Fig.11. After this, select ‘calibration of reversing camera’. Please refer to Fig.12. Then enter the measure value (6580mm/658cm). Please refer to Fig.13. Following this, Fig.14 shows the calibration in process. Following the calibration, check for DTC and check operation of the back- up camera. Please refer to Fig.15a and Fig.15b. Fig.1 Fig.3 Fig.2