Diagnostic trouble code (DTC) information

Condition 

The brake control module (BCM) can register this diagnostic trouble code (DTC) for a number of different fault causes.

1. The diagnostic trouble code is generated if the Brake control module (BCM) registers that the wheel stops or rotates too slowly in relation to the vehicle's reference speed while driving or ABS-control when speed is above 20 km/h.
2. Brake control module (BCM) has a counter, extrapolation counter, which counts the number of times that the speed change on the wheel is too big compared to that which is allowed (calculated). The diagnostic trouble code (DTC) is stored if wheel acceleration on one of the wheel sensors is greater than on other wheel sensors.
3. The diagnostic trouble code (DTC) is stored if the slowest wheel rotates at a speed that is less than 40-60 % of the fastest wheel (depending on the vehicle's speed) but finds that the wheel sensor circuit is unbroken.

The diagnostic trouble code (DTC) can be diagnosed at speeds above 10 km/h.

Substitute Value 

• The ABS is blocked
• Electronic Brake force Distribution (EBD) is blocked if two or more wheel sensors are not working
• Traction control is blocked
• Stability control is blocked
• Active yaw control is blocked
• Brake assistance is blocked.

HINT: For information about brake system abbreviations, see  Brake system, abbreviations  . 

Possible Source 

• One of the wheels has been blocked while the car has being driven
• Loose wheel sensor
• The gap between the wheel sensor and the pulse wheel is too large or too small
• Hub vibrations or play in the wheel bearings
• Defective pulse wheel
• Defective wheel sensor.
• Dirt between wheel sensor and pulse wheel.

Fault symptom[s] 

• General warning lamp lit
• The ABS warning lamp is lit
• The anti-spin warning lamp is lit (up to and including 2002 model year)
• The ABS system does not function
• Anti-spin does not function
• The stability control system does not function
• The traction control system does not function.