Home >> Volvo >> 2007 >> S60 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Driver Door Module (DDM) & Passenger Door Module (PDM) - Diagnostic Trouble Codes - 1 Of 2 >> DDM/PDM-0018 Central Locking Relay RL3. Signal Too Low (2001-2002) >> Signal too low