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
Phone Module (PHM) And Subwoofer (Sub) Module Diagnostic Trouble Codes
- PHM-U001000: Medium Speed Can Communication Bus. General Failure Information. No Sub Type Information (2009-12)
- PHM-U014000: Lost Communication With Central Electronic Module. General Failure Information. No Sub Type Information (2008-09)
- PHM-U014000: Lost Communication With Central Electronic Module. General Failure Information. No Sub Type Information (2009-12)
- PHM-U016400: Lost Communication With Climate Control Unit. General Failure Information. No Sub Type Information (2009-12)
- PHM-U016400: Lost Communication With Climate Control Unit. General Failure Information. No Sub Type Information (2008-09)
- PHM-U019900: Lost Communication With Driver Door Module. General Failure Information. No Sub Type Information (2009-12)
- PHM-U019900: Lost Communication With Driver Door Module. General Failure Information. No Sub Type Information (2008-09)
- PHM-U020000: Lost Communication With Passenger Door Module. General Failure Information. No Sub Type Information (2009-12)
- PHM-U020000: Lost Communication With Passenger Door Module. General Failure Information. No Sub Type Information (2008-09)
- PHM-U030000: Internal Control Module Software Incompatibility. General Failure Information. No Sub Type Information (2008-09)
- PHM-U030000: Internal Control Module Software Incompatibility. General Failure Information. No Sub Type Information (2009-12)
- PHM-U1A4D96 Control Module Internal Power +8 V. Component Failures. Component Internal Failure (2008-09)
- PHM-U1A4E96 Control Module Internal Power Handset Supply. Component Failures. Component Internal Failure (2008-09)
- PHM-U1A4E96 Control Module Internal Power Handset Supply. Component Failures. Component Internal Failure (2009-12)
- PHM-U1A4F96 Control Module Internal Power +5 V. Component Failures. Component Internal Failure (2008-09)
- PHM-U1A5096 Control Module Internal Power +3 V. Component Failures. Component Internal Failure (2008-09)
- PHM-U201A51 Control Module Main Calibration Data. System Programming Failures. Not Programmed (2009-12)
- PHM-U201A54 Control Module Main Calibration Data. System Programming Failures. Missing Calibration (2009-12)
- PHM-U210000: Control Module Not Configured. General Failure Information. No Sub Type Information (2009-12)
- PHM-U210000: Control Module Not Configured. General Failure Information. No Sub Type Information (2008-09)
- PHM-U210100: Control Module Configuration Incompatible. General Failure Information. No Sub Type Information (2008-09)
- PHM-U210100: Control Module Configuration Incompatible. General Failure Information. No Sub Type Information (2009-12)
- PHM-U210909: Back-Up Battery. General Failure Information. Component Failures (2008-09)
- PHM-U210909: Back-Up Battery. General Failure Information. Component Failures (2009-12)
- PHM-U210991: Back-Up Battery. Component Failures. Parametric (2009-12)
- PHM-U210991: Back-Up Battery. Component Failures. Parametric (2008-09)
- PHM-U300044: Control Module. System Internal Failures. Data Memory Failure (2009-12)
- PHM-U300044: Control Module. System Internal Failures. Data Memory Failure (2008-09)
- PHM-U300049: Control Module. System Internal Failures. Internal Electronic Failure (2009-12)
- PHM-U300055: Control Module. System Programming Failures. Not Configured (2008-09)
- PHM-U300362: Battery Voltage. Algorithm Based Failures. Signal Compare Failure (2009-12)
- PHM-U300362: Battery Voltage. Algorithm Based Failures. Signal Compare Failure (2008-09)
- Sub-B1A0711 Speaker #7. General Electrical Failures. Circuit Short To Ground (2008-11)
- Sub-B1A0713 Speaker #7. General Electrical Failures. Circuit Open (2008-11)
- Sub-B1A0813 Speaker #8. General Electrical Failures. Circuit Open (2008-11)
- Sub-B1A1112 Speaker #11. General Electrical Failures. Circuit Short To Ground (2008-11)
- Sub-U200398: Fibre Optic Communication Bus. Component Failures. Component Or System Over Temperature (2008-11)
- Sub-U300005: Control Module. General Failure Information. System Programming Failures (2008-11)
- Sub-U300012: Control Module. General Electrical Failures. Circuit Short To Battery (2008-11)
- Sub-U300016: Control Module. General Electrical Failures. Circuit Voltage Below Threshold (2008-11)
- Sub-U300042: Control Module. System Internal Failures. General Memory Failure (2008-11)
- Sub-U300098: Control Module. Component Failures. Component Or System Over Temperature (2008-11)
- Sub-U300316: Battery Voltage. General Electrical Failures. Circuit Voltage Below Threshold (2008-11)
- Sub-U300317: Battery Voltage. General Electrical Failures. Circuit Voltage Above Threshold (2008-11)
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.