F 550 4WD Super Duty V8-6.4L DSL Turbo (2008)
J3-J4
Test K: The Audio Control Module (ACM) Does Not Respond To The Scan Tool
PINPOINT TEST K: THE AUDIO CONTROL MODULE (ACM) DOES NOT RESPOND TO THE SCAN TOOL
Normal Operation
The audio control module (ACM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06
(GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the ACM. The ACM shares the MS-CAN network with
the smart junction box (SJB), driver seat module (DSM) (if equipped), electronic automatic temperature control (EATC) or electronic manual
temperature control (EMTC) module, DVD player (if equipped), satellite digital audio receiver system (SDARS) module (if equipped) and the
instrument cluster. Voltage for the ACM is provided by circuit SBP39 (WH/RD). Ground is provided by circuit GD114 (BK/BU).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
Audio unit
