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 MANUALSVOLVO2004V70 L5-2.4L VIN 64 B5244S6REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSSWM CODES (STEERING WHEEL MODULE)SWM-0021PERMANENT FAULTACTIVATED FOR LONG TIME. PERMANENT FAULT
2004 Volvo V70 L5-2.4L VIN 64 B5244S6
Activated For Long Time. Permanent Fault
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Activated For Long Time. Permanent Fault
Activated for long time. Permanent fault
Other diagnostic trouble codes
Diagnostic trouble code combination can determine origin of fault.
Are two or several of the following diagnostic trouble codes (DTCs) SWM-001B, SWM-001C, SWM-001D, SWM-001E, SWM-0020, SWM-0021 generated?
Yes - Checking the wires and components
No - Checking the buttons
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Checking the buttons
Check that audio/telephone electric-connector buttons do not become stuck when pressed.
Do the necessary corrective action.
Additional information:
- To access/replace audio/telephone switch unit, see Keypad unit, steering wheel, replacing Keypad Unit, Steering Wheel, Replacing.
Continue - Verification
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Checking the wires and components
If vehicle is equipped with RTI, disconnect RTI switch unit from audio/radio switch unit. Do this to localise fault.
Make a note of the audio/telephone switch-unit button status.
If a button is activated and has not been pressed manually, the fault is in the RTI switch unit.
Disconnect lower connector from audio/radio switch unit. Do this to localise fault.
Make a note of the audio/telephone switch-unit button status.
If a button is activated and has not been pressed manually, the fault is in the audio/telephone switch unit.
Disconnect lower connector from cruise-control switch unit. Do this to localise fault.
Make a note of the audio/telephone switch-unit button status.
If a button is activated and has not been pressed manually, the fault is in the cruise-control switch unit or in the wire between the cruise-control switch unit and audio/telephone switch unit.
Do the necessary corrective action.
Additional information:
- To access/replace RTI switch unit, see
- To access/replace audio/telephone switch unit, see Keypad unit, steering wheel, replacing Keypad Unit, Steering Wheel, Replacing
- To access/replace cruise control switch unit, see Keypad unit, steering wheel, replacing Keypad Unit, Steering Wheel, Replacing.
Continue - Verification
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Verification
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.
Check that all buttons on audio/telephone switch unit work.
Do buttons work?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Trouble-shooting information
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Trouble-shooting 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 - Other diagnostic trouble codes
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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.