No or poor sound for all functions

Read the instructions below then start the fault diagnostic procedure.

Symptom: No or poor sound for all functions.

No or poor sound for all functions

Fault symptoms

No or poor sound for all functions.

Conditions

Ignition ON.

IHU activated.

Diagnostic help

Finding a mechanical or electrical fault.

Checking the wiring harness

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits in the wiring harness. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.