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.
2007 Volvo S60 Base, AWDFACTORY OEM SERVICE PROCEDURE
Headlamp Control Module (HCM) DTCS
HEADLAMP CONTROL MODULE (HCM) DTC INDEX
| Volvo Code | Description |
|---|---|
| HCM-0141 | Control module. Internal fault |
| HCM-0317 | Battery voltage. Voltage too high |
| HCM-2281 | Communication, Central Electronic Module (CEM). Signal missing |
| HCM-2687 | Communication with SAS control module. Signal missing |
| HCM-2987 | Communication with BCM control module. Signal missing |
| HCM-4076 | Lamp unit Wrong mounting position |
| HCM-6401 | Left headlamp swivelling motor circuit Faulty signal |
| HCM-6411 | Left-hand lamp module (LHCU) Voltage too low |
| HCM-6477 | Left headlamp swivelling motor circuit Commanded position not reachable |
| HCM-6501 | Right headlamp swivelling motor circuit Faulty signal |
| HCM-6511 | Rright-hand lamp module (RHCU) Voltage too low |
| HCM-6577 | Right headlamp swivelling motor circuit Commanded position not reachable |
| HCM-DD00 | Communication with left-hand lamp module (LHCU) Faulty signal |
| HCM-DD01 | Communication with left-hand lamp module (LHCU) Signal missing |
| HCM-DD02 | Communication with left-hand lamp module (LHCU) Faulty signal |
| HCM-DD10 | Communication with left-hand lamp module (LHCU) Signal missing |
| HCM-DD20 | Communication with right-hand lamp module (RHCU) Faulty signal |
| HCM-DD21 | Communication with right-hand lamp module (RHCU) Signal missing |
| HCM-DD22 | Communication with right-hand lamp module (RHCU) Faulty signal |
| HCM-DD30 | Communication with right-hand lamp module (RHCU) Signal missing |
| HCM-E000 | Control module communication. Faulty communication |
| HCM-E003 | Configuration fault. Faulty configuration |
| HCM-E010 | Control module. Voltage too low |
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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