Touchscreen (Touch Function) Works Poorly or Not at All

Touchscreen (Touch Function) Works Poorly Or Not At All

View Of Display From Driver's Angle:

Fault Symptom
Touchscreen (touch function) works poorly or not at all.

Enable Criteria
Ignition ON.
IHU activated.

Diagnostic Help
Steering wheel controls work.
Reset the system before starting fault diagnosis and recalibrate.