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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 244 (On-Board Diagnostic - MAZDA Connect (2 Of 5)) >> DTC B119F-49: Communication Error With GNSS [Connectivity Master Unit] >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC B119F:49 (CONNECTIVITY MASTER UNIT) DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 VERIFY IF GNSS INFORMATION CAN BE RECEIVED
  • Switch the ignition ON (engine off) and display the navigation screen of the center display.
  • Is the current position displayed?
 Yes Verify that the repairs have been completed.
No Go to the next step.
2 VERIFY GNSS INFORMATION RECEPTION CONDITION
NOTE:
  • If there is no response, move the vehicle outside (in environment where radio signal is not interrupted or obstructed) and verify the display again.
 Yes Verify that the repairs have been completed.
No Go to the next step.
Repair completion verification 1 VERIFY THAT VEHICLE IS REPAIRED
  • Install/connect the part removed/disconnected during the troubleshooting procedure.
  • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the appropriate service information)
  • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the appropriate service information)
  • Is the same Pending DTC present?
 Yes Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the appropriate service information)
If the CAN communication is normal, perform the diagnosis from Step 1.
  • If the malfunction recurs, replace the connectivity master unit (CMU), then go to the next step. (Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the appropriate service information)
No Go to the next step.
Repair completion verification 2 VERIFY IF OTHER DTCs ARE DISPLAYED
  • Perform the DTC inspection. (Refer to the [DTC INSPECTION] in the appropriate service information)
  • Is a DTC displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
No DTC troubleshooting completed.
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