Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Side-On Collision (USA/Can Only)
In event of a side-on collision, the side impact sensors (7/108, 7/109, 7/115, 7/116, 7/208 and 7/209), in the left and right sides of the vehicle, evaluate the stresses in the impact pulse.
If the collision pulse is powerful enough, the level of the acceleration signal from the side impact sensors will exceed the calculated activation level for the collision protection system in the supplemental restraint system module (SRS) (4/9).
The control module must also receive another signal, either from the acceleration sensors in the control module or another side impact sensor.
If the signal from the impact sensor/control module meets the conditions for deploying the following components, the control module sends a current pulse to the relevant components:
- SIPS bags (8/51 and 8/52)
- inflatable curtains (8/66 and 8/67) and
- belt tensioners (8/33 and 8/34).
The Supplemental restraint system module (SRS) also transmits an impact signal on a directly connected cable to the Central electronic module (CEM) (4/56) when the impact protection has been activated.
An impact status signal is also transmitted to the Central electronic module (CEM) on the CAN. The Central electronic module (CEM) ensures that:
- switch off the fuel pump (FP)
- switch off the windshield wipers when the car is stationary
- turn off defrosting of windows and rearview mirrors if the vehicle is stationary
- light the interior lighting
- light the flashing hazard lights
- unlock the central locking system
- turn off the fuel engine heater
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.