Corsa D
Repair instructions for ABS 8.1, ABS 8.1 ESP
Notes on repair operations on ABS 8.1, ABS 8.1 ESP It is important to comply with the ESD (electrostatic discharge) requirements, if these are not observed components (integrated circuits), especially the pressure sensors of ESP systems, can be destroyed. An appropriate measure must be taken, such as a work area appropriate to ESD. If this is not available employees can also be protected against electrostatic discharges, e.g. by wearing an anti-static armband which is attached to the vehicle body. After carrying out work involving the ABS hydraulic modulator or the ABS control unit (e.g. accident repairs), the entire ABS system must be checked. The test can be performed with "TECH 2" according to the valid Checking Procedure. A self-check of the ABS is performed when stationary with ignition switched on, this self-check may sometimes be audible as a result of noises in the return pump. The following must be observed when working on vehicles with ABS:
Repair Instructions for TC (Traction Control) Traction Control is only offered in conjunction with ABS 8.1 ESP The most important input value of the TC is the distance signal of the ABS wheel sensor. The distance is calculated from the number of wheel revolutions and the tyre diameter. This means that differing tyre diameters, e.g. as a result of worn tyres on the rear axle and new tyres on the front axle, would provide false information about the instantaneous speed of the vehicle. To avoid this undesirable effect, an automatic adaptation to the tyre sizes is performed in the ABS control unit. This adaptation requires a certain period of time. In this time period, the TC may be engaged erroneously. Tyre adjustment can be carried out by the following methods:
Repeat this action 5 times; the system is then fully adapted to the tyre sizes. The engine output / engine torque is controlled automatically so that optimum driving stability, traction and braking actions are constantly assured within the physical limits. This control is implemented by the respective engine control unit by means of interventions in the engine management system. Repair Instructions for TC (Traction Control) (Continued) The TC telltale in the instrument assembly flashes when the TC is engaged. A reduction in engine power during the course of control can also be identified by the fact that the engine no longer reacts as usual to the actuation of the accelerator. The TC is automatically operative when the engine has been started. The system conducts permanent self-monitoring during travel. If the TC telltale in the instrument assembly does not extinguish several seconds after the ignition has been switched on, or lights permanently during travel, a fault has occurred in the TC. In this case, the function of the TC is discontinued. |
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