Possible Causes

AT1: VERIFY THE NO COMMUNICATION DIAGNOSTICS HAVE BEEN PERFORMED

NOTE: Diagnostics in Module Communications Network MUST BE CARRIED OUT before continuing with this pinpoint test.

Has the appropriate pinpoint test in Module Communications Network been carried out for the no communication concern?

Yes	No
INSTALL a new ABS module. CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new ABS module. REFER to the ABS module Removal and Installation procedure in Anti-Lock Brake System (ABS) and Stability Control.	REFER to Module Communications Network and CARRY OUT the ABS module does not respond to the diagnostic scan tool pinpoint test.