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.
2006 Ford Focus ZX4 STFACTORY OEM SERVICE PROCEDURE
Entertainment System DTCS
AUDIO UNIT DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1317 | Battery Voltage High | CHECK the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION . If no concerns are found, GO to PINPOINT TEST A . |
| B1318 | Battery Voltage Low | CHECK the charging system. REFER to CHARGING SYSTEM - GENERAL INFORMATION . If no concerns are found, GO to PINPOINT TEST A . |
| B1342 | ECU is Faulted | CLEAR the DTC. CARRY OUT the self-test. If DTC B1342 is retrieved again, REMOVE the audio unit and SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT . TEST the system for normal operation. |
| B2406 | Audio Disc CD Player Internal Fault | CLEAR the DTC. CARRY OUT the self-test. If DTC B2406 is retrieved again, REMOVE the audio unit and SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT . TEST the system for normal operation. |
| B2477 | ECU Configuration Failure | CLEAR the DTC. CARRY OUT the self-test. If DTC B2477 is retrieved again, REMOVE the audio unit and SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT . TEST the system for normal operation. |
| B2924 | Audio Button Stuck | INSPECT the audio unit for a stuck button and REPAIR the concern, if possible. CLEAR the DTC. CARRY OUT the self-test. If DTC B2924 is retrieved again, REMOVE the audio unit and SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT . TEST the system for normal operation. |
| B2965 | Audio System Speaker Circuit Fault | If there is no sound from all speakers, REMOVE the audio unit and SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT . TEST the system for normal operation after the repair. Otherwise, GO to PINPOINT TEST C . |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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