Cell Phone - Bluetooth(R) Call Volume Too Low/Distorted

T-SB-0097-09

March 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. Please use the following procedure to adjust the outgoing call volume to address these conditions.





Warranty Information

Repair Procedure

This procedure applies to vehicles equipped with the audio bluetooth system only.

NOTE
For vehicles equipped with the Toyota navigation system, please refer to the Repair Manual procedures.

NOTE
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 ignition "ON".

2. Turn radio "OFF".

3. Turn ignition "OFF".

4. Turn ignition "ON", and immediately start pressing the "off hook" button on the steering wheel until the radio displays the "Not Linked" or phone message.

5. Immediately press the volume controls on the steering wheel: Vol. "UP" - Vol. "DOWN" (3 times).

6. Press the tune knob on the radio once (display should read "Vol Type").

7. Turn the tune knob on the radio until the display reads "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 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 outgoing call volume (-2 or -3 are recommended).

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).