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.
Faulty Signal
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Faulty Signal
Faulty signal. Permanent fault
Checking wiring and sensors
- Ignition off
- The control module for the steering wheel angle sensor disconnected
- Steering wheel module (SWM) disconnected
- Connect the breakout box to the control module for the steering wheel angle sensor and to the steering wheel module (SWM).
Check the wiring between the control module for the steering wheel angle sensor
terminal #5 (terminal (#A29) and steering wheel module (SWM) terminal #4 (terminal #A4)
terminal #12 (terminal (#A36) and steering wheel module (SWM) terminal #13 (terminal #A13)
terminal #13 (terminal (#A37) and steering wheel module (SWM) terminal #11 (terminal #A11)
terminal #14 (terminal (#A38) and steering wheel module (SWM) terminal #18 (terminal #A18)
check for a short-circuit to each other.
Try replacing the steering wheel angle sensor if no faults are found in the wiring between the control module for the steering wheel angle sensor and the steering wheel module (SWM).
Other information:
- To disconnect the control module for the steering wheel angle sensor, see Steering wheel module (SWM), replacing Service and Repair
- To connect the breakout box to the steering wheel module (SWM), see Connecting the breakout box Connecting the Breakout Box, Steering Wheel Module (SWM)
- To replace the steering wheel angle sensor, see Contact reel / steering wheel angle sensor, replacing Contact Reel / Steering Wheel Angle Sensor, Replacing
- For information about signals to the control module for the steering wheel angle sensor, see Signal description, Control unit for the steering wheel angle sensor (SAS) Signal Specification
- For information about signals to the steering wheel module (SWM), see Signal specification Signal Specification, Steering Wheel Module (SWM).
Continue - Verification
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Verification
Verification
Hint: After the repair it is necessary to check that the fault has been rectified.
- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
- Read off steering wheel angle signal R1/R2/R3/R4.
- Turn the steering wheel slowly to full lock in both directions.
The value should change between OFF and ON.
Do the values alternate between OFF and ON?
Yes - VERIFIED
No - VERIFICATION FAILEDPAPER
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VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing 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 - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking wiring and sensors
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RENDER: 1.0x
NO RELATED
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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.