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: Wheel Sensor

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Diagnostic trouble code (DTC) ABS-331 is stored if, via the wheel sensor signals, the control module registers one or more wheel speeds deviates too much from the car's reference speed.

Diagnostic trouble code (DTC) ABS-331 is stored is the control module needs to activate ABS control for one or more wheels for more than 60 seconds consecutively.

Diagnostic trouble code (DTC) ABS-31X is stored if the control module registers that the wheel sensor signals are affected by interference, or if there is interference on one or more wheels (for more than 5 seconds with the brakes off or for more than 20 seconds with the brakes on).

Substitute Value

The ABS function is disengaged.
If a wheel is under ABS control and a wheel sensor fault for the wheel occurs, the ABS system is disengaged immediately.
If more than one wheel is under the ABS control and a wheel sensor fault occurs, the ABS system is disengaged when the ABS control ceases.

Possible Source

The wheel sensor is loose.
Defective pulse wheel.
Hub vibrations or play in the wheel bearings.

Fault symptom[s]

The ABS warning lamp lights.
The stop (brake) warning lamp lights.
There is a danger that the wheels will lock during braking when the ABS function is disengaged.
Poor braking effect.
The brakes pull to one side.

HINT: If the fault becomes intermittent, the ABS warning lamp will not go out until the ignition is next switched on.