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 L5-2.5L TURBO VIN 59 B5254T2REPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - STEERING AND SUSPENSIONRELAYS AND MODULES - STEERINGSTEERING MOUNTED CONTROLS COMMUNICATION MODULETESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESCHECKING THE CRUISE-CONTROL SWITCH UNITCHECKING THE CRUISE CONTROL SWITCH
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2
Checking the Cruise Control Switch
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2SECTION Checking the Cruise Control Switch
Checking the cruise control switch
Checking components and wiring
Ignition off.
Ignition on.
Read off the status of the buttons in the cruise control switch.
If the cruise control switch is functioning the fault is outside the steering wheel module.
Is the cruise control switch working?
Yes - No Fault Found
No - Car equipment
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Car equipment
Is the car equipped with RTI?
Yes - Checking components and wiring
No - Checking components and wiring
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Checking components and wiring
- Ignition off
- Disconnect the RTI switch
- Ignition on.
Activate and read off the status of the buttons in the audio / carphone switch.
If the readings give a correct result, the fault is in the RTI switch.
Other information:
- To access the RTI switch, see the relevant service procedure.
Was the audio / carphone switch status OK?
Yes - Fault Found
No - Checking components and wiring
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Checking components and wiring
- Ignition off
- Disconnect the audio / carphone switch by disconnecting the lower connector on the audio / carphone switch
- Ignition on.
Activate the buttons. Read off the status of the buttons in the cruise control switch
If the readings give a correct result, the fault is in the audio / carphone switch.
Other information:
- To access the audio / carphone switch, see the relevant service procedure.
Was the status of the cruise control switch OK?
Yes - Fault Found
No - Checking components and wiring
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Checking components and wiring
- Ignition off
- Disconnect the audio / carphone wiring by disconnecting the lower connector on the cruise control switch
- Ignition on.
Activate the buttons. Read off the status of the buttons in the cruise control switch
If the readings give a correct result, the fault is in the wiring between the audio / carphone switch and the cruise control switch.
Other information:
- To access the cruise control switch, see the relevant service procedure.
Was the status of the cruise control switch OK?
Yes - Fault Found
no - Checking components and wiring
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Checking components and wiring
Check the voltage between terminals #B1 and #B3. Voltage should be approximately 12 V.
Check the voltage between terminals #B2 and #B3. Voltage should be approximately 5 V.
Check the voltage between terminal #B3 and the battery negative terminal. Voltage should be approximately 0 V.
If the above readings are OK, the fault is in the cruise control switch.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Steering Wheel Module (SWM).
Was a fault detected?
Yes - Fault Found
No - No Fault Found
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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.