Anti-Lock Brake System: Description

Anti-Lock Brake System (ABS) prevents wheel lock-up, allowing driver to maintain steering control during heavy braking. ABS consists of an Electronic Control Unit (ECU) with an LED that displays self-diagnostic codes, actuator (electro-hydraulic unit), warning light, wheel speed sensors, wiring and hydraulic lines. See ELECTRICAL COMPONENT LOCATIONS table. 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.

ELECTRICAL COMPONENT LOCATIONS

Component

Location

Actuator

Except 300XZ

In Engine Compartment

300ZX

Near Right Rear Wheelwell

ECU

Maxima

In Trunk, At Right End Of Rear Shelf

Stanza

In Trunk, At Center Of Rear Shelf

240SX

Forward Of Left Rear Wheelwell

300ZX

Forward Of Right Rear Wheelwell

Relays

⁽¹⁾ On Actuator

Wheel Speed Sensor

Front

At Wheel Hub

Rear

Maxima & Stanza

At Wheel Hub

240SX & 300ZX

On Differential

⁽¹⁾	Actuator relay is Black; Motor relay is Blue or Green.

NOTE: For more brake system information, See DISC & DRUM article in this section.

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.