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.
Symptom Chart - CTA
2021 Ford Edge SE, 4WDSECTION Symptom Chart - CTA
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
| Condition | Possible Sources | Action |
|---|---|---|
| A module does not respond to the diagnostic scan tool | Fuse Communication concern Wiring, terminals or connectors Module |
REFER to: Communications Network . |
| The CTA system is inoperative or does not function correctly | Refer to the Pinpoint Tests | GO to Pinpoint Test B |
| The CTA system has poor or inconsistent performance | Refer to the Pinpoint Tests | GO to Pinpoint Test B |
| The CTA system message center warnings are not displayed and the exterior mirror BLIS®/ CTA LED does not illuminate | Refer to the Pinpoint Tests | GO to Pinpoint Test B |
| An exterior mirror BLIS®/ CTA LED does not illuminate when the audio tone sounds for the CTA system | Refer to the Pinpoint Tests | GO to Pinpoint Test B |
| An exterior mirror BLIS®/ CTA LED is always on | Refer to the Pinpoint Tests | GO to Pinpoint Test C |
| An exterior mirror BLIS®/ CTA LED does not illuminate | Refer to the Pinpoint Tests | GO to Pinpoint Test D |
| The IPC message center displays a blocked sensor message | Refer to the Pinpoint Tests | GO to Pinpoint Test E |
| The CTA system cannot be turned off in the message center | Refer to the Pinpoint Tests | GO to Pinpoint Test F |
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.