Diagnostic trouble code (DTC) information
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Condition
Diagnostic trouble code (DTC) ABS-443 is stored if the control module registers that the pump is running without being activated; that the pump motor has no supply voltage when it is activated; that the signal generated in the pump motor circuit when the pump motor supply voltage has been cut off (generated voltage), is abnormal or an open circuit to ground in the pump motor.
The pump motor is activated during ABS control and during the valve and pump motor test. The control module carries out the valve and pump motor test the first time the car reaches 6 km/h or 15 km/h during the same driving cycle.
Substitute Value
- The ABS function is disengaged.
- The EBD function is disengaged if fuse 12 has blown.
Possible Source
- Replace fuse 12 (50A) in the integrated relay/fusebox.
- Open-circuit in the power supply (30-supply) to control module connector terminal: 17.
- Open-circuit in the pump motor power supply or in the ground lead.
- Defective hydraulic pump.
- Contact resistance in the terminals.
- Defective control module.
Fault symptom[s]
- The ABS warning lamp lights.
- The stop (brake) warning lamp lights.
- There is a risk of wheel lock-up when braking if the ABS system is disengaged.