Please help.. ABS NOT WORKING

[Dr. Taha]

Hello everyone
I have 2008 4runner v8 Limited with 73k miles only.

Have my ABS , VSC Trac with blinking VSC lights in my dash (no Engine Check)
Everything in my 4R working fine except ABS not working on the way (No annoying sounds from Pump).

After checking found lots of codes (not erasable) :

c1223 abs control system malfunction
u0073 control module communication bus OFF
u0123 lost communication with yaw rate sensor module
u0124 lost communication with lateral acceleration sensor module
u0126 lost communication with steering angle sensor module

Steps done:
1- OBD devices could not read engine P CODES.
2- CAN Hi at OBD 3V
3- CAN Low at OBD 2.1V with 60Ohm difference bettwen the two CAN ends (so CAN BUS is fine)
4- checked the Yaw sensor & its plug all fine
5- checked Steering angle sensor and its plug ; they are fine too.
6- tried to replace my ABS Pump same codes ; so i returned my prev. Pump.

Please any suggestions??

 

[jambone]

Did you perform the "zero point calibration"? It's free and easy to try. With all those codes, it's likely something else though.

 

[Dr. Taha]

Did you perform the "zero point calibration"? It's free and easy to try. With all those codes, it's likely something else though.

Thank you for your reply
Yes i tried to do ZPC many times but nothing happens.

 

[rwh963]

make sure the abs control module is properly plugged in. i have a failure in mine, similar lights, unplugged it because brake lights on all the time. need to rep[lace the whole unit, probably with used, at some point.