System Operation

During normal driving and braking operations, ABS acts like a conventional braking system. Each wheel sensors constantly sends an AC signal to EBCM. This information is translated to wheel rotation speed. When EBCM determines that wheel lock-up is about to occur, it activates electro-magnetic valves, located inside valve block to increase or decrease hydraulic pressure to each wheel. A slight pulsation should be felt through brake pedal. Warning lights should come on when key is turned on and vehicle is started. If either light stays on more than 30 seconds after vehicle is started, system malfunction is indicated. See DIAGNOSIS & TESTING  .

The "BRAKE" warning light in the instrument panel cluster (IPC) will come on when a condition exists that will result in reduced braking ability, if parking brake is applied, low brake fluid, if there is low accumulator pressure. Light will be on when ignition key is turned to the BULB TEST or START position. Light should go out 30 seconds after engine is started. "ANTI-LOCK" warning light located in the instrument panel cluster (IPC) is controlled by EBCM. "ANTI-LOCK" light will come on if EBCM detects problem with system. When "ANTI-LOCK" light is on, ABS is partially or totally disabled. If the "ANTILOCK" light is on along with the "BRAKE" light there may be something wrong with the hydraulic system.