ABS Diag

The red brake warning lamp is on and the amber ABS lamp is off. Technician A says that a fault is possible in the base brake system. Technician B says that the red brake warning lamp can be turned on by a low brake fluid level in the master cylinder. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and B

• Neither Tech

Two technicians are discussing magnetic-type wheel speed sensors. Technician A says that wheel speed sensors are magnetic. Technician B says that the toothed sensor ring is magnetic. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and B

• Neither Tech

Technician A says that using the space saving small spare tire may trigger an ABS amber warning lamp. Technician B says the use of the small spare tire on either front wheel may trigger the red brake warning lamp. Which technician is correct?

• Tech A

• Tech B

• Both Tech's And B

• Neither Tech

Technician A says that, with some antilock braking systems, the diagnostic trouble code may be lost if the ignition is turned off before retrieving the code. Technician B says that some antilock braking systems require that a terminal be grounded to cause the amber ABS warning lamp to flash diagnostic trouble codes. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and B

• Neither Tech

Technician A says that a scan tool may be required to retrieve data and diagnostic trouble codes from some antilock braking systems. Technician B says that a jumper wire can be used to retrieve diagnostic codes on some antilock braking systems. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and B

• Neither Tech

Technician A says that a breakout box is often required to diagnose an antilock braking system. Technician B says that a breakout box requires to use of a digital multimeter. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and B

• Neither Tech

Technician A says that a noise or vibration may be sensed by the driver when the ABS performs a self test. Technician B says that the ABS fuse may have to be removed to erase some ABS diagnostic codes if a scan tool is not used. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and B

• Neither Tech

The ABS computer uses what signal characteristic from a wheel speed sensor?

• Voltage

• Frequency

• Resistance

• Electromagnetic

Most wheel speed sensors should measure how much resistance?

• 800 to 1,400 ohms

• 100 to 30 ohms

• 1 to 3 ohms

• 0.1 to 1 ohm

Technician A says that the ABS electrohydraulic unit can be bled using bleeder screws and the manual method. Technician B says that a scan tool is often required to bleed the ABS electrohydraulic unit. Which technician is correct?

• Tech A

• Tech B

• Both Tech's A and b

• Neither Tech