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.
Circuit/System Verification
- Ignition ON.
- Verify all the associated primary controls on the radio (Volume, Mute, Seek, etc.) operate properly.
- If any of the primary controls do not function properly
Refer to Symptoms - Entertainment .
- Go to next step: If all of the primary controls function properly
- If any of the primary controls do not function properly
- Verify the scan tool Steering Wheel Control Switches parameter changes when pressing the S70R Steering Wheel Controls Switch - Right buttons.
- If the parameter does not change for some of the S70R Steering Wheel Controls Switch - Right switches
Replace S70R Steering Wheel Controls Switch - Right.
- If the parameter does not change for all of the S70R Steering Wheel Controls Switch - Right switches
Refer to S70R Steering Wheel Controls Switch Circuit/System Testing with UV6 or without UV6.
- Go to next step: If the parameter changes for all S70R Steering Wheel Controls Switch - Right buttons
- If the parameter does not change for some of the S70R Steering Wheel Controls Switch - Right switches
- Verify the scan tool Steering Wheel Control Switches parameter changes between Volume Up and Volume Down when depressing the S70F Steering Wheel Controls Switch - Radio Volume switch.
- If the parameter does not change
Refer to S70F Steering Wheel Controls Switch - Radio Volume Circuit/System Testing.
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the scan tool Steering Wheel Control Switches parameter changes between Next Preset and Previous Preset when depressing the S70E Steering Wheel Controls Switch - Radio Presets switch.
- If the parameter does not change
Refer to S70E Steering Wheel Controls Switch - Radio Presets Circuit/System Testing.
- Go to next step: If the parameter changes
- If the parameter does not change
- All OK.
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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.