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UHP / B2455 04

Read the instructions below then start the fault diagnostic procedure.

Symptom: Can dial out. You cannot be heard, but the other party can be heard.

  B2455 04


Microphone Circuit Open

Fault symptom

Can dial out. You cannot be heard, but the other party can be heard.

On-board diagnosis

Enable criteria:

Call/Voice control must not be active.

Fault criteria:

Mircophone signal input short circuited to B+ or has open circuit.

Checking the wiring harness

Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.

Diagnostic help

Diagnosis regards:

Electrical fault in connecting leads or in the component (mainly poor contact).

Functions in the diagnostic tool related to the fault:

Activation:
Mute Radio
Audio Out
UHP Self Test