Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Audio Control Module (ACM) DTC Chart
| DTC | Description | Action |
|---|---|---|
| B1031 | SDARS Satellite Antenna Open | See PINPOINT TEST 12: POOR RECEPTION/POOR SOUND QUALITY/NO SOUND - SATELLITE AUDIO . |
| B1032 | SDARS Satellite Antenna Short | See PINPOINT TEST 12: POOR RECEPTION/POOR SOUND QUALITY/NO SOUND - SATELLITE AUDIO . |
| B1318 | Battery Voltage Low | See PINPOINT TEST 14: DTC B1318 (ACM) . |
| B1342 | ECU is Faulted |
NOTE:
|
| B2103 | Antenna Not Connected | See PINPOINT TEST 1: POOR RECEPTION - AM/FM . |
| B2406 | Audio Disc CD Player Internal Fault |
NOTE:
|
| B2477 | Module Configuration Failure | See MODULE CONFIGURATION . |
| B2965 | Audio System Speaker Circuit Fault | See PINPOINT TEST 2: POOR QUALITY/DISTORTED/NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) . |
| U0140 | Lost Communication With Body Control Module (GEM) | See PINPOINT TEST 13: DTC U0140 . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | See PINPOINT TEST 6: THE SPEED SENSITIVE VOLUME DOES NOT OPERATE CORRECTLY . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS) | See PINPOINT TEST 11: THE SATELLITE AUDIO IS INOPERATIVE/DOES NOT OPERATE CORRECTLY . |
| U0255 | Lost Communication With Front Controls Interface Module | See PINPOINT TEST 8: THE AUDIO SYSTEM DOES NOT OPERATE CORRECTLY FROM THE FRONT CONTROLS INTERFACE MODULE (FCIM) . |
| U0256 | Lost Communication With Front Display Interface Module | See PINPOINT TEST 10: AN INDIVIDUAL FRONT DISPLAY INTERFACE MODULE (FDIM) DISPLAY IS INOPERATIVE/DOES NOT OPERATE CORRECTLY . |
| U2050 | No Application Present | See MODULE CONFIGURATION . |
| U2051 | One or More Calibration Files Missing/Corrupt | See MODULE CONFIGURATION . |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.