Anti-Lock Brake System: Description

Anti-Lock Brake System (ABS) is designed to allow driver to maintain steering control during heavy braking. ABS system consists of an Electronic Control Unit (ECU), actuator (electro-hydraulic unit), warning lights, wheel speed sensors, wiring and hydraulic lines. See Fig 1 through Fig 4 .

Actuator (electro-hydraulic unit) consists of a pump motor, accumulator, solenoid valves for each channel, actuator relay, pump motor relay, check valves and reservoirs. Maxima, Stanza and 300ZX use a 4-channel system, and 240SX uses a 3-channel system. ECU has self-diagnostic capability to alert driver in the event of a system malfunction. An LED located on the ABS Electronic Control Unit (ECU) will flash (indicating trouble codes) when warning light is illuminated.

Fig 1: Locating ABS Components (Maxima)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Locating ABS Components (Stanza)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Locating ABS Components (240SX)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Locating ABS Components (300ZX)

Courtesy of NISSAN MOTOR CO., U.S.A.