Poor radio reception.

Read the instructions below then start the fault diagnostic procedure.

Symptom: Poor radio reception. CD/SDAR functions normally.

Poor radio reception.

Fault symptoms

Poor radio reception.

CD/SDAR functions normally.

Conditions

No diagnostic trouble codes stored relating to the current symptom.

Diagnostic help

Note that a mobile telephone antenna mounted in the glass of the rear window can give impaired radio reception.

One of the following is the likely cause of the fault:

- The head unit is not properly pushed into the radio casing.

- Poor connection of the antenna cable in the radio casing/head unit. - Poor connection of the coaxial cable.

- The antenna amplifier voltage supply (trigger voltage) or the ground are incorrect.

- Open circuit in the glass mounted antenna (rear window, 4D or side rear windows, 5D).

- Poor connection between the antenna amplifier and the glass mounted antenna.

Checking the wiring harness

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 Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.