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DTC Charts

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For all U-codes listed in this chart, if no related symptoms are observed, disregard the DTC.
NOTE: For all U-codes listed in this chart, if DTC B1318 is present, diagnose it before diagnosing the U-code DTC.
AUDIO CONTROL MODULE (ACM) DTC CHART

DTC Description Action
B1117 Audio Steering Wheel Button Stuck VERIFY that no steering wheel control switches are stuck and that no steering wheel control button was pressed during the self-test.
If no concern is found, go to Pinpoint Test G .
B1119 (Navigation only) Audio Disc DVD Player Thermal Shutdown
NOTE: This DTC refers to the navigation DVD mechanism, not the DVD entertainment system.
The audio control module (ACM) was over-temperature. Navigation operation will resume after the ACM cools. This is normal operation. CLEAR the DTCs.
B1136 (Navigation only) Audio Steering Wheel Switch #2 Circuit Failure Go to Pinpoint Test G .
B1140 (Navigation only) Map Disk Invalid REMOVE the map DVD and CLEAN it. INSPECT for scratches, fingerprints, or damage, and REPAIR as necessary. VERIFY a valid map DVD is being used. If no concern is found, INSERT a known good map DVD. REPEAT the self-test.
B1318 Battery Voltage Low CLEAR the DTCs. TEST the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
  • If the charging system is OK, the DTC was set by a previous low voltage condition. No concern is found at this time.
  • If the charging system is not OK, REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnose the low battery voltage condition.
B1342 ECU is Faulted CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan  or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
B2103 Antenna Not Connected Go to Pinpoint Test A .
B2204 (Navigation only) GPS Antenna Connection Open or Short Go to Pinpoint Test K .
B2274 Phone Transceiver Active Circuit Failure DISREGARD the DTC. CLEAR the DTCs.
B2384 Audio Reverse Aid Mute Input CKT Failure DISREGARD the DTC. CLEAR the DTCs.
B2404 Audio Steering Wheel Switch Circuit Fault Go to Pinpoint Test G .
B2405 Audio Disc CD Player Thermal Shutdown Fault The ACM was over-temperature. Audio operation will resume after the ACM cools. This is normal operation. CLEAR the DTCs.
B2406 Audio Disc CD Player Internal Fault
NOTE: DTC B1342 will also be set.
CLEAR the DTCs. REPEAT the self-test. If DTC B2406 or B1342 is retrieved again, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan  or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
B2477 Module Configuration Failure REFER to MODULE CONFIGURATION article.
B2633 (Navigation only) Driver-Front Microphone Circuit Failure Go to Pinpoint Test P .
B2656 (Navigation only) DVD (Digital Versatile Disk) Error
NOTE: DTC B1342 will also be set.
NOTE: This DTC refers to the navigation DVD mechanism, not the DVD entertainment system.
CLEAR the DTCs. REPEAT the self-test. If DTC B2656 or B1342 is retrieved again, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan  or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
B2924 Audio Button Stuck
NOTE: For the navigation system, the hard key test should be used to isolate a stuck button.
VERIFY no ACM buttons are stuck and that no ACM button is pressed during the self-test. CLEAR the DTCs. REPEAT the self-test. If DTC B2924 is retrieved again, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan  or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
B2965 Audio System Speaker Circuit Fault For the THX® audio system, go to Pinpoint Test C .
For all others, go to Pinpoint Test B .
C1992 Vehicle Speed Circuit Failure DISREGARD the DTC. CLEAR the DTCs.
P0812 Reverse Input Circuit DISREGARD the DTC. CLEAR the DTCs.
U0140 Lost Communication With Body Control Module (GEM) If a back lighting concern is present, REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION article.
If the accessory delay does not function correctly, REFER to WIPERS AND WASHERS article.
U0155 Lost Communication With Instrument Panel Cluster (IC) Control Module If the speed sensitive volume does not operate correctly, go to Pinpoint Test Q .
If the navigation is inaccurate, go to Pinpoint Test O .
U0159 Lost Communication With Parking Assist Control Module (PAM) Go to Pinpoint Test N .
U0193 Lost Communication With Digital Audio Control Module (SDARS) Go to Pinpoint Test H .
U0196 Lost Communication With Entertainment Control Module - Rear (AUX) DISREGARD the DTC. CLEAR the DTCs.
U0197 Lost Communication With Telephone Control Module Go to Pinpoint Test R .
U0238 Lost Communication With Digital Audio Control Module "D" (DSP) Go to Pinpoint Test D .
U0249 Lost Communication With Entertainment Control Module - Rear "B" (RCU) DISREGARD the DTC. CLEAR the DTCs.
U2050 No Application Present REFER to MODULE CONFIGURATION article.
U2051 One or More Calibration Files Missing/Corrupt REFER to MODULE CONFIGURATION article.
U2473 Unexpected Vehicle Speed (VSS) Go to Pinpoint Test O .
NOTE: For all U-codes listed in this chart, if no related symptoms are observed, disregard the DTC.
NOTE: For all U-codes listed in this chart, if DTC B1318 is present, diagnose it before diagnosing the U-code DTC.
AUDIO DIGITAL SIGNAL PROCESSING (DSP) MODULE DTC CHART

DTC Description Action
B1158 Subwoofer #2 Open Go to Pinpoint Test C .
B1317 Battery Voltage High CLEAR the DTCs. TEST the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
  • If the charging system is OK, the DTC was set by a previous high voltage condition. No concern is found at this time.
  • If the charging system is not OK, REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnose the over-charging condition.
B1318 Battery Voltage Low CLEAR the DTCs. TEST the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
  • If the charging system is OK, the DTC was set by a previous low voltage condition. No concern is found at this time.
  • If the charging system is not OK, REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnose the low battery voltage condition.
B1342 ECU is Faulted CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new DSP module. REFER to Audio Digital Signal Processing (DSP) Module . TEST the system for normal operation.
B2477 Module Configuration Failure REFER to MODULE CONFIGURATION article.
B2913 Audio Subwoofer Not Connected Go to Pinpoint Test C .
B2925 Subwoofer Speaker Short Circuit Go to Pinpoint Test C .
B292A Subwoofer #2 Speaker Short Circuit
NOTE: Despite the DTC description, this DTC applies to the DSP module clip/enable circuit, not the subwoofer.
Go to Pinpoint Test C .
B2965 Audio System Speaker Circuit Fault If the symptom is no audio from all speakers, go to Pinpoint Test D .
If the symptom is no audio from one or more (but not all) speakers, go to Pinpoint Test C .
C1992 Vehicle Speed Circuit Failure DISREGARD the DTC. CLEAR the DTCs.
U0155 Lost Communication With Instrument Panel Cluster (IC) Control Module CARRY OUT the network test using the scan tool.
U0184 Lost Communication With Radio (ACM) CARRY OUT the network test using the scan tool.
U0196 Lost Communication With Entertainment Control Module - Rear (AUX) DISREGARD the DTC. CLEAR the DTCs.
U2050 No Application Present REFER to MODULE CONFIGURATION article.
U2051 One or More Calibration Files Missing/Corrupt REFER to MODULE CONFIGURATION article.
NOTE: For all U-codes listed in this chart, if no related symptoms are observed, disregard the DTC.
NOTE: For all U-codes listed in this chart, if DTC B1318 is present, diagnose it before diagnosing the U-code DTC.
SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE DTC CHART

DTC Description Action
B1031 SDARS Satellite Antenna Open Go to Pinpoint Test I .
B1032 SDARS Satellite Antenna Short Go to Pinpoint Test I .
B1318 Battery Voltage Low CLEAR the DTCs. TEST the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
  • If the charging system is OK, the DTC was set by a previous low voltage condition. No concern is found at this time.
  • If the charging system is not OK, REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnose the low battery voltage condition.
B1342 ECU is Faulted CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new satellite digital audio receiver system (SDARS) module. REFER to Satellite Digital Audio Receiver System (SDARS) Module . TEST the system for normal operation.
B2477 Module Configuration Failure REFER to MODULE CONFIGURATION article.
U0184 Lost Communication With Radio (ACM) Go to Pinpoint Test H .
U0196 Lost Communication With Entertainment Control Module - Rear (AUX) DISREGARD the DTC. CLEAR the DTCs.
U0197 Lost Communication With Telephone Control Module Go to Pinpoint Test H .
U0249 Lost Communication With Entertainment Control Module - Rear "B" (RCU) DISREGARD the DTC. CLEAR the DTCs.
U2050 No Application Present REFER to MODULE CONFIGURATION article.
NOTE: For all U-codes listed in this chart, if no related symptoms are observed, disregard the DTC.
NOTE: For all U-codes listed in this chart, if DTC B1318 is present, diagnose it before diagnosing the U-code DTC.
ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DTC CHART

DTC Description Action
B1038 Microphone Input Circuit Failure Go to Pinpoint Test V .
B1117 Audio Steering Wheel Button Stuck Go to Pinpoint Test G .
B1136 Audio Steering Wheel Switch #2 Circuit Failure Go to Pinpoint Test G .
B1317 Battery Voltage High CLEAR the DTCs. TEST the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
  • If the charging system is OK, the DTC was set by a previous high voltage condition. No concern is found at this time.
  • If the charging system is not OK, REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnosis the over-charging condition.
B1318 Battery Voltage Low CLEAR the DTCs. TEST the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
  • If the charging system is OK, the DTC was set by a previous low voltage condition. No concern is found at this time.
  • If the charging system is not OK, REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnosis the low battery voltage condition.
B1342 ECU is Faulted CLEAR the DTCs. CARRY OUT the self-test. If DTC B1342 is retrieved again, INSTALL a new accessory protocol interface module (APIM). REFER to Accessory Protocol Interface Module (APIM) . TEST the system for normal operation.
B2477 Module Configuration Failure REFER to MODULE CONFIGURATION article.
U0184 Lost Communication With Radio (ACM) Go to Pinpoint Test R .
U0196 Lost Communication With Entertainment Control Module - Rear (AUX) DISREGARD the DTC. CLEAR the DTCs.
U0249 Lost Communication With Entertainment Control Module - Rear "B" (RCU) DISREGARD the DTC. CLEAR the DTCs.
U0255 Lost Communication With Front Controls Interface Module DISREGARD the DTC. CLEAR the DTCs.
U0256 Lost Communication With Front Display Interface Module DISREGARD the DTC. CLEAR the DTCs.
U2050 No Application Present REFER to MODULE CONFIGURATION article.
U261C USB #1 Device Error Go to Pinpoint Test T .
U261D USB #2 Device Error DISREGARD the DTC. CLEAR the DTCs.
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