Cellular Telephone Conversation Partner Does Not Hear You
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Cellular Telephone Conversation Partner Does Not Hear You
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Audio Signal Power
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1
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1
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1
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1
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Audio Signal Low Reference
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-
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1
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1
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1
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1. Cellular telephone conversation partner does not hear you
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Circuit/System Description
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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
Cellular Telephone Schematics
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
Circuit/System Verification
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Ignition ON, observe the scan tool Microphone Signal parameter. The reading should be between 2-5 V.
1.
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Ignition OFF, disconnect the harness connector at the B24 cellular phone microphone.
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2.
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Ignition OFF, wait until all retained accessory power is OFF, test for less than 10 Ω between the low reference circuit terminal 1 or A (depending on vehicle) and ground, allowing up to 5 minutes for the circuit resistance to drop to its lowest reading.
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3.
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If greater than the specified range, test the circuit for an open/high resistance.
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4.
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Ignition ON, test for 9.5-10.5 V between the signal circuit terminal 2 or B (depending on vehicle) and ground.
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5.
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If less than the specified value, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K82 mobile telephone control module.
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6.
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If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the K82 mobile telephone control module.
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7.
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If all circuits test normal, replace the B24 cellular phone microphone.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for module replacement, setup, and programming.