abs

abs is needed for
- good steering during brake application
- more load/speed
- best braking (maintain cof) just before lock up
- under law since march 1, 1998 (manufactured)
components
- tone wheel
- sensor (input)
- e.c.u linked to other e.c.us
- modulator valves (output)
  - always monitor & modulate steering axle individually
yellow cable is usually used for SRS (air bag)
modulator use 12V signal
blink code only show 1 active error at a time (not like computer), we have to clear it before seeing other error
abs just bumping the brake at
- right time (wheel lock)
- right place
- only to the tire that is locked
abs light
- start up - self check - then off
- active fault - stay on
- blink code
- off road, flashes steady.
- a.t.c fault
atc apply brake while throttle on the floor.
- below 40km/h, using differential braking
- above 40km/h, derate engine
atc light
- start up, then off
- on while a.t.c is functioning
- mud/snow flashes

steering