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.

Schematic Reference

LINK

Connector End View Reference

Component Connector End Views

Description and Operation

Cellular Telephone Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Microphone Signal parameter. The reading should be between10 mV and 20 mV.

1. Ignition OFF, disconnect the harness connector at the B24 Cellular Telephone Microphone
2. Ignition OFF, test for less than 5 Ω between outer shield and ground.

⇒	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. Ignition OFF, test for less than 5 Ω between low reference circuit terminal 2 and ground.

⇒	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. Ignition ON, test for 9-11 V between the signal circuit terminal 3 and ground.

⇒	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 Cellular Telephone Microphone.

Perform the Diagnostic Repair Verification