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

Fig 1: Identifying ABS Control Module

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Diagnostic trouble code (DTC) ABS-411, ABS-412, ABS-413, ABS-414, ABS-421, ABS-422, ABS-423 or ABS-424 is stored (depending on the valve coil) if the control module registers that the signal from the valve coil (either activated or deactivated) is shut off for more than 20 ms. One of these diagnostic trouble codes (DTCs) will also be stored if the signal from the valve coil is shut off for more than 10 ms when testing the valve and pump motor.

The valves and pump motor are activated during ABS control and when testing the valve and pump motor. The control module carries out the valve and pump motor test the first time the car reaches 6 km/h each driving cycle as long as the brake pedal is not depressed. The test is carried out at 15 km/h if the brake pedal is depressed.

Substitute Value

The ABS function is disengaged.

Possible Source

Interference, noise etc. affecting the control module calculations.
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.