Be careful how you say it You confused me with the way you stated your problem although after rereading your post I understand it and you make perfect sense. The ABS is always ON. It does not "kick in". Be careful how you talk to a service manager about this as he will try to dismiss you if he can.
ABS is controlled by a ECU, electrical control unit. This compares the vehicle speed to the speed of the wheel. When there is a variance, to its little mind, it sends a signal to electrically controlled hydraulic valves that control the brakes. This is why you get the pulsating feeling through the brake pedal when the ABS valves are working.
Usually when you turn on the key to the accessory position the ABS will momentarily put put itself in test mode. You could try just looking at this ABS test by turning your key to accessory mode. Read about it in your owner's manual, as it is possible that it tests itself when you first start up instead. Usually the ECU is designed to be self-testing and often it is also redundant, that is, it is a dual processor in case one processor fails. Usually, if the ECU fails a clear signal is sent and you get some kind of warning appearing on your instrument cluster. If the whole processor fails it should throw a code that can be read by your dealer's OBD code reader. I do not know how Maruti handles complete failure. You may find it in your owner's manual as well. The suggestion to let other BHPians look at it is an excellent one. |