No or poor sound in all functions

Read the instructions below then start the fault diagnostic procedure.

Symptom: No or poor sound from one or more speakers.

No or poor sound in all functions

Fault symptom

No or poor sound from one or more speakers.

Preconditions

Ignition ON.

Radio reception

Conditions

Switch Nav/Tele must be connected. There must be a power supply and grounding. Check both connectors for faulty pins and oxidation.

Diagnostic help

Reset the system before starting fault diagnosis and recalibrate.

Check switches for oxidation and faulty pins. Check several points and directions of the wiring harness to detect any intermittent open or short-circuits.

See also the description of read values under ”General fault diagnosis” for more information.