How to test rear ABS on Ford vehicles?

How to test Rear ABS (RABS) on Ford vehicles – YouTube In this video I demonstrate how to get code flashouts from the RABS module and diagnose the rear differential sensor without crawling on the ground!

What does the warning light on Ford ABS mean?

When the brake computer see’s the wheel isn’t moving it begins to pulse the brake calipers on that particular wheel. If it receives false information or erratic signals it will turn on the warning light to notify the driver of a problem within the ABS system.

What happens when the ABS fails on a car?

In certain cases, depending on the model of vehicle, when the ABS module fails, the brake pedal may become unresponsive. This is an obvious problem, as an unresponsive brake pedal will not stop a vehicle, or will not be able to do so in an adequately safe manner.

What are the symptoms of a bad ABS control module?

1. Unresponsive brake pedal. In certain cases, depending on the model of vehicle, when the ABS module fails, the brake pedal may become unresponsive. This is an obvious problem, as an unresponsive brake pedal will not stop a vehicle, or will not be able to do so in an adequately safe manner.

How to diagnose ABS modulator valve problems?

To diagnoses ABS modulator valve problems, you have to know how they work to apply, hold or release the brakes. Each brake corner has two valves. The inlet/isolation valve isolates the brake corner from the ABS pump/accumulator and the master cylinder.

What does the ABS do at 10 mph?

The above capture was taken at about 10 mph, with the brake pedal released and with no ABS intervention. Channel A (Blue) is monitoring RH rear WSS (wheel speed sensor) and channel B (Red) monitoring LH rear WSS.

Is the wheel speed sensor part of the ABS system?

The ABS wheel speed sensor can also be called an ABS brake sensor or, more plainly, an ABS sensor. Whatever it is called, it is a critical part of the ABS. The anti-lock braking system (ABS) is found on most new vehicles.

Why are my abs cutting in at low speed?

According to the capture, our problem is only in one area of the rotor, and these shiny spots correlated well with the recorded capture, but a distance problem between sensor and tooth isn’t the problem here. The shape of the teeth has already been covered and eliminated; it was the make-up of the shiny spots that was now in question.

How to test rear ABS on Ford vehicles?