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
- Verify the application is installed on the mobile device and is up to date.
- If the application is not installed or is not up to date.
Install or update the application on the device.
- Go to next step: If the application is installed on the mobile device and is up to date
- If the application is not installed or is not up to date.
- Verify the application operates correctly on the mobile device.
- If the application is not operating correctly on the mobile device.
Refer to the application web site.
- Go to next step: If the application is operating correctly on the mobile device.
- If the application is not operating correctly on the mobile device.
- Verify the K74 Human Machine Interface Control Module calibrations are current.
- If the calibrations are not current
Reprogram the K74 Human Machine Interface Control Module and re-evaluate the concern.
- Go to next step: If no update calibrations are available
- If the calibrations are not current
- Verify the application is installed on the K74 Human Machine Interface Control Module and is up to date.
- If the application is not installed or is not up to date.
Install or update the application and re-evaluate the concern.
- Go to next step: If the application is installed and is up to date
- If the application is not installed or is not up to date.
- Ignition On/Vehicle in Service Mode. Infotainment system ON.
- Verify the mobile device can connect to the infotainment system. Refer to the owner manual for information on the preferred connection method for the device.
- If the mobile device cannot connect to the vehicle infotainment system.
- If unable to connect via Bluetooth, refer to Bluetooth Malfunction .
- If unable to connect via USB, refer to Auxiliary Audio Input Malfunction .
- Go to next step: If the mobile device connects to the vehicle infotainment system.
- Launch the application.
- Verify the application operates properly with the vehicle infotainment system.
- If the application does not function properly
Refer to diagnostic aids.
- Go to next step: If the application functions properly
- If the application does not function properly
- 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.