Honda and Rover ABS pumps, controllers, and modulators.

 

Honda & Rover Ant-Lock Braking System (ALB) for ABS

 

Honda ALB2 ABS fault codes
Technical tips - Honda ALB2 ABS pump

The Anti-Lock Braking (ALB) system pioneered by Honda and produced by Nissin has enjoyed three generations of application.

Honda and Rover ABS pumps, controllers, and modulators.
(ALB2 pump pictured)
  Fitted to both Rover 2 & 4 series and Honda Concertos and early Accords, the ALB 1 generation has a separate pump, high pressure accumulator, modulator, and controller.
Honda and Rover ABS pumps, controllers, and modulators.
(ALB2 modulator pictured)
  ALB 2 provided a bigger pump combined with the accumulator and pressure sensor. Still a separate modulator and controller were used.
Honda and Rover ABS pumps, controllers, and modulators.
(ALB3 modulator pictured)
  ALB 3 was a further development still with the pump, accumulator, sensor, and modulator combined and just a separate controller.

On the whole the ALB 1, 2, & 3 ABS system is safer than most on the road because it retains a supply of high pressure brake fluid in the accumulator. Thus if ABS conditions prevail for a prolonged period the driver is not reliant on a pump motor supplying reserve pressure (which might have failed or rusted)...the modulator taps pressure from the accumulator instead. Alas, this intrinsic safety comes at a price. The system is vulnerable to leaks, siezures, and pressure sensor failures. These are all symptomatic of the higher operating reserve pressures designed for safety reasons.

Fortunatley BBA supplies a range of tests and remanufactured components for the entire ALB system. We should add that with the odd exception, the controllers on these applications seem to be bullet proof, so if you suspect the computer, check again!