To the top of the document
Volt
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

Cellular Telephone Conversation Partner Does Not Hear You

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Audio Signal Power

1

1

1

1

Audio Signal Low Reference

--

1

1

1

1. Cellular telephone conversation partner does not hear you

Circuit/System Description

The mobile telephone control module uses the microphone to allow driver communication with the cellular telephone. The cellular telephone is connected to the mobile telephone control module via Bluetooth.

Reference Information

Schematic Reference

Cellular Telephone Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Cellular Telephone Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Vehicle ON, observe the scan tool Microphone Signal parameter. The reading should be between 2-5 V.

Circuit/System Testing
  1. Vehicle OFF, disconnect the harness connector at the B24 Mobile Phone Microphone.
  2. Vehicle OFF, test for less than 10 Ω between outer shield and ground.
    3. ⇒If greater than the specified range, test the outer shield circuit for an open/high resistance. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
  3. Vehicle OFF, test for less than 10 Ω between low reference circuit terminal 2 and ground.
    4. ⇒If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
  4. Vehicle ON, test for 9-11 V between the signal circuit terminal 3 and ground.
    5. ⇒If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
    ⇒If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
  5. If all circuits test normal, replace the B24 Mobile Telephone Microphone.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    • Control Module References for mobile telephone control module replacement, programming and setup
    •  Mobile Telephone Microphone Replacement
   


&#169© Copyright Chevrolet. All rights reserved