Antilock Braking System (4825) Second Course

Off - Car Exercises

Think about ABS repair:

Misconceptions, The ABS system should be simple and robust, with the Module/ECU/Controller almost never giving any trouble.

Below are some possible causes for damaging an ECU.

• Spiked by careless welding, i.e. MIG welding without dissconecting the battery.

True

• Enclosure seal damaged and with obvious sign of water ingress.

True

• Obvious signs of mechnical damage to the enclosure.

True

Often the ECU will be misdiagnosed as faulty, usually because the technician is inexperienced in fault finding.

• Faults are much more likely to be with connections or sensors.

True

Discuss how this ECU issues should be incorporated into diagnostic practises to test and ABS system:

ABS controls the brake pressure at the wheels, therefore its purpose are stabilty and steerbility. During the braking session the ECU controls the wheel speed sensor.