DTC: B116A:13 [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]
id0902g8452100
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Description |
Open circuit in microphone circuit |
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Detection condition
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Microphone non-connection signal constantly detected
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Fail-safe function
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Not applicable
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Possible cause
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• Connector or terminal malfunction
• Open circuit in wiring harness between Bluetooth unit terminal B and microphone terminal B
• Short to ground in wiring harness between Bluetooth unit terminal A and microphone terminal A
• Microphone malfunction
• Bluetooth unit malfunction
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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INSPECT MICROPHONE CONNECTOR STATUS
• Switch the ignition off (LOCK).
• Disconnect the negative battery cable.
• Disconnect the microphone connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is there any malfunctioning part?
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Yes
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Repair or replace the connector, then go to Step 5.
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No
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Go to the next step.
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2
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INSPECT Bluetooth UNIT CONDITION
• Disconnect the Bluetooth unit connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is there any malfunctioning part?
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Yes
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Repair or replace the connector, then go to Step 5.
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No
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Go to the next step.
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3
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INSPECT MICROPHONE CIRCUIT FOR OPEN CIRCUIT
• Inspect the wiring harness for continuity between Bluetooth unit terminal B and microphone terminal B (vehicle wiring harness side).
• Is there continuity?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth unit terminal B and microphone terminal B (vehicle wiring harness side).
If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open circuit.
Go to Step 5.
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4
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INSPECT FOR SHORT TO GROUND IN MICROPHONE INPUT CIRCUIT
• Inspect for continuity between Bluetooth unit terminal A (vehicle wiring harness side) and body ground.
• Is there continuity?
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Yes
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Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth unit terminal A (vehicle wiring harness side) and body ground.If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has a short to ground.
Go to the next step.
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No
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Go to the next step.
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5
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PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS MICROPHONE OR Bluetooth UNIT
• Reconnect all the disconnected connectors.
• Connect the negative battery cable.
• Perform an inspection of the Bluetooth unit DTCs.
• Is the same DTC displayed?
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Yes
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Replace the microphone, then go to the next step.
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No
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Go to Step 7.
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6
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Perform an inspection of the Bluetooth unit DTCs.
• Is the same DTC displayed?
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Yes
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Replace the Bluetooth unit, then go to the next step.
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No
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Go to the next step.
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7
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning part according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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