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 Mazda B3000 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Audio Unit DTCS
AUDIO UNIT DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Action |
|---|---|---|---|
| B1342 ECU | ECU is Defective | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B1342 ECU is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B1342 TAPE | Audio Tape Deck Mechanism Fault | Audio Unit | Verify that no cassette is inserted in the audio unit. Document and clear the DTCs. Carry out T the self-test. If DTC B1342 TAPE is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B1342 CD | Audio Single-Disc CD Internal Fault | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B1342 CD is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B2103 TUNER | Antenna Not Connected | Audio Unit | See PINPOINT TEST 2: POOR RECEPTION |
| B2209 ECU | ECU ROM Checksum Error | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B2209 ECU is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B2404 SWC | Audio Steering Wheel Switch Circuit Fault | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B2404 SWC is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B2405 CD | Audio Single-Disc CD Thermal Fault | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B2405 CD is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B2406 CD | Audio Single-Disc CD Mechanism Fault or Audio Single-Disc CD Unreadable Media Fault | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B2406 CD is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B2857 CD | Audio Multiple-Disc CD Internal Fault or Audio CD Multiple-Disc CD Unreadable Media Fault | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B2857 CD is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
| B2858 CD | Audio Multiple-Disc CD Player Thermal Fault | Audio Unit | Document and clear the DTCs. Carry out T the self-test. If DTC B2858 CD is retrieved again, replace the audio unit. See AUDIO UNIT . Test the system for normal operation. |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.