2. The system includes an electronic control device, sensors (mounted on a wheel), hydraulic modulator and necessary valves and relays. Models with ABS have disc brakes on all four wheels. The system is designed to prevent the wheels from locking during heavy braking. This is achieved by automatically releasing the braking force on the locked wheel and then re-applying it. This procedure is carried out several times per second by the hydraulic modulator.
3. The modulator is controlled by an electronic device that receives signals directly from sensors mounted on the wheels of the vehicle. Sensors monitor the condition of the wheels - whether they are blocked or not. The modulator regulates the braking force on the front brakes independently, and on the rear brakes - as a single unit.
4. The ABS block is installed between the brake master cylinder and the brakes.
5. If the ABS text remains illuminated on the instrument panel for more than approximately 4 seconds, or if it appears intermittently (or stays on) when the vehicle is moving, it means there is damage in the system.
In this case, it is recommended to have an Opel dealer perform a full system test on the appropriate diagnostic equipment.
6. To prevent possible damage to the electronic control unit, be sure to disconnect its wiring connector before welding.
7. It is recommended to remove the control unit before performing work that involves heating the car to high temperatures (e.g. paint drying).
8. When cleaning the vehicle with steam, do not aim the water/steam jet directly at the control box.
9. Do not disconnect the wiring connector of the control unit with the ignition on.
10. Do not use a starting device to start the engine.
11. After working on the ABS system components, make sure that all electrical wiring connectors are connected correctly and have your Opel dealer check the system at the first opportunity.
12. All models with ABS prior to 1991 are equipped with ABS-2E. Since 1992, the ABS-2EN system has been installed on the model, which can be identified by the location of the electronic control unit (bolted to the hydraulic modulator).
13. The main differences between the two systems are in their electrical components, for example, the 2EH system does not have an anti-jamming relay.
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