Chapter 107 ABS Diagnosis and Service
The red brake warning lamp is on and the amber ABS lamp is off. Tech A says that a
fault is possible in the base brake system. Tech B says that the red brake warning lamp
can be turned on by a low brake fluid level in the master cylinder. Which Tech is
correct? - answer Both
Two Techs are discussing magnetic-type wheel speed sensors. Tech A says that wheel
speed sensors are magnetic. Tech B say that the toothed sensor ring is magnetic.
Which Tech is correct? – answer Tech A
Tech A says that using the space saving small spare tire may trigger an ABS amber
warning lamp. Tech B says the uses of the small spare tire on either front wheel may
trigger the red brake warning lamp. Which Tech is correct? – answer Tech A
Tech A says that, with some anti-lock braking systems, the diagnosis trouble code may
be lost if the ignition is turned off before retrieving the code. Tech B says that some anti-
lock braking system require that terminal be grounded to cause the amber ABS warning
lamp to flash diagnostic trouble code. Which Tech is correct? - answer Both
Tech A says that a scan tool may be required to retrieve data and diagnostic trouble
codes from some anti-lock braking systems. Tech B says that a jumper wire can be
used to retrieve diagnostic codes on some anti-lock braking systems. Which Tech is
correct? - answerBoth
Tech A says that a breakout box is often required to diagnose an anti-lock braking
system. Tech B says that a breakout box requires to use of a digital multimeter. Which
Tech is correct? - answerBoth
Tech A says that a noise or vibration may be sensed by the driver when the ABS
performs a self test. Tech 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 Tech is correct? -
answerBoth
The ABS computer uses what signal characteristic from a wheel speed sensor? -
answerFrequency
Most wheel speed sensors should measure how much resistance? - answer800 to 1400
ohms
The red brake warning lamp is on and the amber ABS lamp is off. Tech A says that a
fault is possible in the base brake system. Tech B says that the red brake warning lamp
can be turned on by a low brake fluid level in the master cylinder. Which Tech is
correct? - answer Both
Two Techs are discussing magnetic-type wheel speed sensors. Tech A says that wheel
speed sensors are magnetic. Tech B say that the toothed sensor ring is magnetic.
Which Tech is correct? – answer Tech A
Tech A says that using the space saving small spare tire may trigger an ABS amber
warning lamp. Tech B says the uses of the small spare tire on either front wheel may
trigger the red brake warning lamp. Which Tech is correct? – answer Tech A
Tech A says that, with some anti-lock braking systems, the diagnosis trouble code may
be lost if the ignition is turned off before retrieving the code. Tech B says that some anti-
lock braking system require that terminal be grounded to cause the amber ABS warning
lamp to flash diagnostic trouble code. Which Tech is correct? - answer Both
Tech A says that a scan tool may be required to retrieve data and diagnostic trouble
codes from some anti-lock braking systems. Tech B says that a jumper wire can be
used to retrieve diagnostic codes on some anti-lock braking systems. Which Tech is
correct? - answerBoth
Tech A says that a breakout box is often required to diagnose an anti-lock braking
system. Tech B says that a breakout box requires to use of a digital multimeter. Which
Tech is correct? - answerBoth
Tech A says that a noise or vibration may be sensed by the driver when the ABS
performs a self test. Tech 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 Tech is correct? -
answerBoth
The ABS computer uses what signal characteristic from a wheel speed sensor? -
answerFrequency
Most wheel speed sensors should measure how much resistance? - answer800 to 1400
ohms
