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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> On-Board Diagnostic - Audio >> DTC: 26-Er84; MICROPHONE CIRCUIT MALFUNCTION >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Inspection Action
1 INSPECT MICROPHONE CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the microphone connector.
  • Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector or terminal, then go to Step 6.
No Go to the next step.
2 INSPECT Bluetooth ® UNIT CONNECTOR CONDITION
  • Disconnect the Bluetooth ® unit connector.
  • Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector or terminal, then go to Step 6.
No Go to the next step.
3 INSPECT MICROPHONE INPUT CIRCUIT FOR SHORT TO GROUND
  • Verify that the microphone and Bluetooth ® unit connectors are disconnected.
  • Inspect for continuity between Bluetooth ® unit terminal A (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth ® unit terminal A and microphone terminal A. 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 Step 6.
No Go to the next step.
4 INSPECT MICROPHONE CIRCUIT FOR OPEN CIRCUIT
  • Verify that the microphone and Bluetooth ® unit connectors are disconnected.
  • Inspect for continuity between Bluetooth® unit terminal E (wiring harness-side) and microphone terminal E (wiring harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth® unit terminal E and microphone terminal E. 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 6.
5 VERIFY IF MALFUNCTIONING LOCATION IS MICROPHONE DEPENDING ON REPEATABILITY Yes Replace the microphone, then go to the next step.
(See MICROPHONE REMOVAL/INSTALLATION .)
No Go to Step 7.
6 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
7 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [AUDIO UNIT] .)
No DTC troubleshooting completed.
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