Home >> Volvo >> 2002 >> S60 Base, 2.4 61, Standard >> Repair and Diagnosis >> Body & Frame >> Door Locks >> 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