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.
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HOMESERVICE MANUALSVOLVO2003XC70REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTAUDIO MODULE (AUM), PHONE MODULE (PHM), ROAD TRAFFIC INFORMATION (RTI) DIAGNOSTIC TROUBLE CODES (XC)PHM-003A: INTERNAL ANTENNA. OPEN CIRCUIT. INTERMITTENT FAULT (2001-2004)DIAGNOSTIC TROUBLE CODE INFORMATION
2003 Volvo XC70
Diagnostic trouble code information
2003 Volvo XC70SECTION Diagnostic trouble code information
Condition
If the phone module (PHM) registers an open circuit on the internal backup antenna, diagnostic trouble code PHM-003A is set.
Possible Source
- Open circuit on internal antenna.
Fault symptom[s]
- Message in text window.
RENDER: 1.0x
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:
- • 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.