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.
2009 Volvo XC70 BaseFACTORY OEM SERVICE PROCEDURE
Audio Module (AUD) DTCS
AUDIO MODULE (AUD) - DTC INDEX
| DTC | Volvo Code | Description |
|---|---|---|
| B1A01 | AUD-B1A0111 | Speaker #1. General Electrical Failures. Circuit short to ground |
| B1A01 | AUD-B1A0112 | Speaker #1. General Electrical Failures. Circuit short to battery |
| B1A01 | AUD-B1A0113 | Speaker #1. General Electrical Failures. Circuit open |
| B1A01 | AUD-B1A011A | Speaker #1. General Electrical Failures. Circuit resistance below threshold |
| B1A01 | AUD-B1A0149 | Speaker #1. System Internal Failures. Internal electronic failure |
| B1A02 | AUD-B1A0211 | Speaker #2. General Electrical Failures. Circuit short to ground |
| B1A02 | AUD-B1A0212 | Speaker #2. General Electrical Failures. Circuit short to battery |
| B1A02 | AUD-B1A0213 | Speaker #2. General Electrical Failures. Circuit open |
| B1A02 | AUD-B1A021A | Speaker #2. General Electrical Failures. Circuit resistance below threshold |
| B1A02 | AUD-B1A0249 | Speaker #2. System Internal Failures. Internal electronic failure |
| B1A03 | AUD-B1A0311 | Speaker #3. General Electrical Failures. Circuit short to ground |
| B1A03 | AUD-B1A0312 | Speaker #3. General Electrical Failures. Circuit short to battery |
| B1A03 | AUD-B1A0313 | Speaker #3. General Electrical Failures. Circuit open |
| B1A03 | AUD-B1A031A | Speaker #3. General Electrical Failures. Circuit resistance below threshold |
| B1A03 | AUD-B1A0349 | Speaker #3. System Internal Failures. Internal electronic failure |
| B1A04 | AUD-B1A0411 | Speaker #4. General Electrical Failures. Circuit short to ground |
| B1A04 | AUD-B1A0412 | Speaker #4. General Electrical Failures. Circuit short to battery |
| B1A04 | AUD-B1A0413 | Speaker #4. General Electrical Failures. Circuit open |
| B1A04 | AUD-B1A041A | Speaker #4. General Electrical Failures. Circuit resistance below threshold |
| B1A04 | AUD-B1A0449 | Speaker #4. System Internal Failures. Internal electronic failure |
| B1A06 | AUD-B1A0611 | Speaker #6. General Electrical Failures. Circuit short to ground |
| B1A06 | AUD-B1A0613 | Speaker #6. General Electrical Failures. Circuit open |
| B1A09 | AUD-B1A0911 | Front speaker. General Electrical Failures. Circuit short to ground |
| B1A10 | AUD-B1A1011 | Rear speaker. General Electrical Failures. Circuit short to ground |
| B1A11 | AUD-B1A1112 | Speaker outputs. General Electrical Failures. Circuit short to battery |
| B1D84 | AUD-B1D8411 | Headphone pannel 1. General Electrical Failures. Circuit short to ground |
| B1D84 | AUD-B1D8413 | Headphone pannel 1. General Electrical Failures. Circuit open |
| B1D84 | AUD-B1D8423 | Headphone pannel 1. General Signal Failures. Signal stuck low |
| B1D85 | AUD-B1D8511 | Headphone pannel 2. General Electrical Failures. Circuit short to ground |
| B1D85 | AUD-B1D8513 | Headphone pannel 2. General Electrical Failures. Circuit open |
| B1D85 | AUD-B1D8523 | Headphone pannel 2. General Signal Failures. Signal stuck low |
| U2003 | AUD-U200398 | Fiber Optic Communication Bus. General Electrical Failures. Component or system over temperature |
| U3000 | AUD-U300005 | Control Module. General Failure Information. System Programming Failures |
| U3000 | AUD-U300012 | Control Module. General Electrical Failures. Circuit short to battery |
| U3000 | AUD-U300016 | Control Module. General Electrical Failures. Circuit voltage below threshold |
| U3000 | AUD-U300042 | Control Module. System Internal Failures. General memory failure |
| U3000 | AUD-U300044 | Control Module. General Electrical Failures. Data memory failure |
| U3000 | AUD-U300055 | Control Module. System Programming Failures. Not configured |
| U3000 | AUD-U300087 | Control Module. Bus Signal/Message Failures. Missing message |
| U3000 | AUD-U300098 | Control Module. Component Failures. Component or system over temperature |
| U3003 | AUD-U300316 | Battery Voltage. General Electrical Failures. Circuit voltage below threshold |
| U3003 | AUD-U300317 | Battery Voltage. General Electrical Failures. Circuit voltage above threshold |
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.