LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2019 >> Mustang EcoBoost, 2D Convertible, Automatic Trans >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> DTC Index (Horn System - Power Steering System) >> Information System And Entertainment System DTCS >> ACM
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Information System And Entertainment System DTCS: ACM

DTC Description Action
B1142:27 Ignition Status 1: Signal Rate of Change Above Threshold
NOTE: This code sets when the wired start signal was detected by the ACM, but the ignition mode message from the BCM does not correspond (RUN mode).
DIAGNOSE all other symptoms and Diagnostic Trouble Codes (DTCs) first. If no other symptom or DTC is present, DISREGARD this DTC.
B1A01:01 Speaker #1: General Electrical Failure For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A01:11 Speaker #1: Circuit Short To Ground For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A01:12 Speaker #1: Circuit Short To Battery For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A01:13 Speaker #1: Circuit Open For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A02:01 Speaker #2: General Electrical Failure For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A02:11 Speaker #2: Circuit Short To Ground For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A02:12 Speaker #2: Circuit Short To Battery For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A02:13 Speaker #2: Circuit Open For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A03:01 Speaker #3: General Electrical Failure For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A03:11 Speaker #3: Circuit Short To Ground For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A03:12 Speaker #3: Circuit Short To Battery For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A03:13 Speaker #3: Circuit Open For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A04:01 Speaker #4: General Electrical Failure For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A04:11 Speaker #4: Circuit Short To Ground For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A04:12 Speaker #4: Circuit Short To Battery For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A04:13 Speaker #4: Circuit Open For a 6 speaker system, GO to Pinpoint Test H
For a 9 speaker system, GO to Pinpoint Test I
For a 12 speaker system, GO to Pinpoint Test J
B1A89:11 Satellite Antenna: Circuit Short To Ground For a satellite radio concern, GO to Pinpoint Test B
For a SIRIUS Travel Link™ concern, GO to Pinpoint Test V
B1A89:13 Satellite Antenna: Circuit Open For a satellite radio concern, GO to Pinpoint Test B
For a SIRIUS Travel Link™ concern, GO to Pinpoint Test V
B1D19:49 Compact Disc Unit: Internal Electronic Failure GO to Pinpoint Test K
B1D19:4B Compact Disc Unit: Over Temperature GO to Pinpoint Test K
B1D55:11 Antenna #2: Circuit Short To Ground GO to Pinpoint Test A
B1D55:15 Antenna #2: Circuit Short To Battery or Open GO to Pinpoint Test A
U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information GO to Pinpoint Test Z
U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test AB
U0142:00 Lost Communication With Body Control Module "B": No Sub Type Information GO to Pinpoint Test AC
U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information GO to Pinpoint Test AE
U0237:00 Lost Communication With Digital Audio Control Module "C": No Sub Type Information GO to Pinpoint Test AK
U0238:00 Lost Communication With Digital Audio Control Module "D": No Sub Type Information GO to Pinpoint Test AL
U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information GO to Pinpoint Test AM
U0256:00 Lost Communication With Front Controls Interface Module "A": No Sub Type Information GO to Pinpoint Test AN
U201A:51 Control Module Main Calibration Data: Not Programmed This DTC sets due to an incorrect or incomplete ACM configuration. Using a diagnostic scan tool, CARRY OUT the ACM programming procedure using as-built data. REFER to: Module Programming .
U2100:00 Initial Configuration Not Complete: No Sub Type Information This DTC sets due to an incorrect or incomplete ACM configuration. Using a diagnostic scan tool, CARRY OUT the ACM programming procedure using as-built data. REFER to: Module Programming .
U2101:00 Control Module Configuration Incompatible: No Sub Type Information This DTC sets due to an incorrect or incomplete ACM configuration. Using a diagnostic scan tool, CARRY OUT the ACM programming procedure using as-built data. REFER to: Module Programming .
U3000:41 Control Module: General Checksum Failure CLEAR the DTC. WAIT at least 10 seconds. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) .
U3000:42 Control Module: General Memory Failure CLEAR the DTC. WAIT at least 10 seconds. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) .
U3000:96 Control Module: Component Internal Failure CLEAR the DTC. WAIT at least 10 seconds. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) .
U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test AO
U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test AP