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.
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HOMESERVICE MANUALSVOLVO2007XC90 AWD V8-4.4L VIN 85 B8444SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONC CODE CHARTSC0061C006101 (BRAKE CONTROL MODULE - BCM)TROUBLESHOOTING
2007 Volvo XC90 AWD V8-4.4L VIN 85 B8444S
Troubleshooting
2007 Volvo XC90 AWD V8-4.4L VIN 85 B8444SSECTION Troubleshooting
Troubleshooting
Checking the wiring
- Ignition off
Check the cables for an open circuit.
Measure between:
- The connector for AYC sensor terminal #1 and brake control module (BCM) terminal #A25 (#A25).
- The connector for AYC sensor terminal #2 and brake control module (BCM) terminal #A29 (#A29).
- The connector for AYC sensor terminal #3 and brake control module (BCM) terminal #A6 (#A6).
- The connector for AYC sensor terminal #5 and brake control module (BCM) terminal #A39 (#A39).
If no defect is found on the cables, replace the AYC sensor.
Remedy as necessary.
Other information
- Signal specification, brake control module (BCM) with DSTC (dynamic stability and traction control), B8444S, B6324S Signal Specification
- Active yaw control sensor, replacing Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the malfunction has been remedied.
- Ignition off
- Reconnect the connectors, components, etc.
- Test-drive the vehicle according to Test Drive Form (DSTC (dynamic stability and traction control) /brake control module), description Test Drive Form (DSTC (Dynamic Stability and Traction Control)/Brake Control Module), Description.
Note! Do not turn off the ignition between test-driving and reading out diagnostic trouble codes. This is to obtain the correct status of the diagnostic trouble codes.
Then read out the diagnostic trouble code's status without turning off the ignition after the test-drive.
Is the status of the diagnostic trouble code intermittent?
Yes - Troubleshooting procedure complete
No - Troubleshooting information
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Troubleshooting information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit Fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the wiring
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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.