Cell Phone - Bluetooth(R) Call Volume Too Low/Distorted
L-SB-0030-09March 24, 2009
Audio Bluetooth System Outgoing Call Volume Adjustment
Service Category
Audio/Visual/Telematics
Section
Cellular Communication
Market
USA
Applicability
Introduction
When using the audio Bluetooth system some customers may mention that the outgoing call volume is too low or distorted. Use the procedures provided below to adjust the outgoing call volume and address customer concerns.
Warranty Information
Repair Procedure
This entire procedure must be completed within 15 seconds from the time the ignition is turned on until you press the tune knob on the radio. Vehicle must have a phone previously paired to the system for this procedure to work.
1. Turn radio "OFF".
2. Turn vehicle "OFF".
3. Press the Start Switch twice to engage "ON" mode and immediately start pressing the 'off hook' button on the steering wheel until the radio displays the "Not Linked" message.
4. Immediately press the volume controls on the steering wheel: Vol. "UP" - Vol. "DOWN" (3 times).
5. Then press the tune knob on the radio once.
6. The display should read "Vol. Type".
7. Turn the tuning knob on the radio until it says "Send" volume, then press tune knob.
Only choose "Send" volume, modifying other settings may cause poor performance of the Bluetooth system.
8. If the customer is mentioning that the outgoing call volume is too low, turn the volume knob to the right to increase outgoing call volume (+3 or +4 are recommended).
9. If the customer is mentioning of distorted or clipping sound in the outgoing call then decrease the outgoing call volume by turning the volume knob to the left (-2 or -3 are reccommended).
10. If Bluetooth system still has original customer issue after performing the adjustment, diagnose microphone circuit using the following repair manual instructions found on the Technical Information System (TIS).
^ ES 350:
Audio/Visual/Telematics - Audio/Video - Audio and Visual System: "Microphone Circuit between Microphone and Radio Receiver"