Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Trouble Code (DTC) Information
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information
Condition
The brake control module (BCM) receives information about wheel speed from the wheel sensors. The wheel sensors, which are on the wheel mounting, read off a pulse wheel on the wheel spindle. Diagnostic trouble code (DTC) BCM-0010, BCM-0020, BCM-0030 or BCM-0040 is stored, depending on the wheel sensor, if the control module registers that the signal from any of the wheel sensors is distorted or missing too many times.
- BCM-0010: Wheel sensor, left front
- BCM-0020: Wheel sensor, right front
- BCM-0030: Wheel sensor, left rear
- BCM-0040: Wheel sensor, right rear.
The diagnostic trouble code (DTC) can be diagnosed at speeds above 10 km/h.
Substitute value
- The ABS is blocked
- Electronic Brake force Distribution 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 Brake System, Abbreviations.
Possible source
- Contact resistance in the terminals
- Open-circuit, short-circuit to ground or supply voltage in the power supply to the wheel sensor
- The signal cables are short-circuited to each other
- Short-circuit to supply voltage or ground in the signal cable
- Open-circuit in the signal cable
- Defective wheel sensor
- Internal fault in the control module.
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 warning lamp for brake circuit not functioning is lit
- 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.
Note! If the fault is intermittent the ABS warning lamp will not go out until the vehicle speed exceeds 10 km/h in the next operating cycle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.