When it comes to the Volvo Code BCM-0030, it is important to understand the impact a faulty signal from the wheel sensor can have on the brake control module (BCM). With the diagnostic trouble code (DTC) BCM-0030, this means that the wheel sensor on the left rear wheel has faulty signal. The brake control module (BCM) registers that the signal from the wheel sensor is below 4.5 mA ± 10% or above 20 mA ± 10%. This can lead to a number of issues that need to be addressed in order to ensure proper functioning of the BCM.
Potential Causes and Solutions of Volvo Code BCM-0030
| Cause | Solution |
|---|---|
| Contact resistance in the terminals | Check for any corrosion or dirt build up and clean/replace terminals. |
| Open-circuit, short-circuit to ground or supply voltage in the power supply to the wheel sensor | Inspect the wheel sensor power supply wiring and replace any damaged wires. |
| The signal cables are short-circuited to each other | Check for any damaged or shorted wires and replace if necessary. |
| Short-circuit to supply voltage or ground in the signal cable | Check for any damaged or shorted wires and replace if necessary. |
Checking Contact Resistance in the Terminals
The first step when troubleshooting the Volvo Code BCM-0030 is to check for contact resistance in the terminals. This is to ensure proper electrical power supply to the wheel sensor. To do this, the technician must check for any corrosion or dirt build up and clean or replace the terminals if necessary.
Inspecting the Wheel Sensor Power Supply Wiring
The next step is to inspect the wheel sensor power supply wiring for any open-circuit, short-circuit to ground or supply voltage. If there are any damaged wires, they must be replaced to avoid further issues with the brake control module (BCM).
Checking for Shorted Signal Cables
The technician must also check for any shorted or damaged wires in the signal cables. These cables are responsible for transferring the signal from the wheel sensor to the BCM. If any of the wires are short-circuited to each other or to a supply voltage or ground, they must be replaced to avoid further issues with the BCM.
Conclusion
The Volvo Code BCM-0030 indicates that the wheel sensor on the left rear wheel has a faulty signal. To address this issue, the technician must check for contact resistance in the terminals, inspect the wheel sensor power supply wiring and check for any shorted or damaged wires in the signal cables. If any of these components are found to be faulty, they must be replaced to ensure proper functioning of the brake control module (BCM). With the proper diagnosis and repair of the Volvo Code BCM-0030, the vehicle should be able to function properly.
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