LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2017 >> CX-5 Touring, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> On-Board Diagnostic - Audio >> DTC: 28-Er01; 28-Er09; USB MECHANISM MALFUNCTION, USB PLAYBACK FUNCTION FILE/TRACK >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Inspection Action
1 INSPECT USB DEVICE/iPod
  • Connect the USB device/iPod to another vehicle (model/unit).
  • Is the USB device/iPod connection detected/unit plays back.
 Yes Go to the next step.
No System is normal. (USB device/iPod malfunction or incompatible USB device.)
Go to Step 7.
2 INSPECT AUXILIARY JACK/USB PORT CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the auxiliary jack/USB port connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is there any malfunctioning part?
 Yes Repair or replace the connector, then go to Step 7.
No Go to the next step.
3 INSPECT AUXILIARY JACK/USB PORT Yes Replace the auxiliary jack/USB port, then go to Step 7.
(See AUXILIARY JACK/USB PORT REMOVAL/INSTALLATION .)
No Go to the next step.
4 INSPECT AUDIO UNIT CONNECTOR CONDITION
  • Disconnect the audio unit connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is there any malfunctioning part?
 Yes Repair or replace the connector, then go to Step 7.
No Go to the next step.
5 INSPECT WIRING HARNESS FOR SHORT TO GROUND BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT
  • Verify that the connectors for the audio unit and the auxiliary jack/USB port are disconnected.
  • Inspect for continuity between the following wiring harness terminals (wiring harness-side) and body ground:
    • Auxiliary jack/USB port terminal UD
    • Auxiliary jack/USB port terminal UC
    • Auxiliary jack/USB port terminal UA
      • Auxiliary jack/USB port terminal UB
  • Is there continuity?
 Yes Refer to the wiring diagram and verify if there is a common connector between the following terminals (wiring harness-side):
  • Audio unit terminal 3A-Auxiliary jack/USB port terminal UD
  • Audio unit terminal 3B-Auxiliary jack/USB port terminal UC
  • Audio unit terminal 3C-Auxiliary jack/USB port terminal UA
  • Audio unit terminal 3D-Auxiliary jack/USB port terminal UB

    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 7.
No Go to the next step.
6 INSPECT WIRING HARNESS FOR OPEN CIRCUIT BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT
  • Verify that the connectors for the audio unit and the auxiliary jack/USB port are disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side).
    • Audio unit terminal 3A-Auxiliary jack/USB port terminal UD
    • Audio unit terminal 3B-Auxiliary jack/USB port terminal UC
    • Audio unit terminal 3C-Auxiliary jack/USB port terminal UA
      • Audio unit terminal 3D- Auxiliary jack/USB port terminal UB
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify if there is a common connector between the following terminals (wiring harness-side):
  • Audio unit terminal 3A-Auxiliary jack/USB port terminal UD
  • Audio unit terminal 3B-Auxiliary jack/USB port terminal UC
  • Audio unit terminal 3C-Auxiliary jack/USB port terminal UA
  • Audio unit terminal 3D-Auxiliary jack/USB port terminal UB
  • 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 the next step.
7 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
8 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.
scientia non olet · About LEMON Manuals