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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Symptom Troubleshooting - Entertainment System - With Center Display) >> Real Time Traffic Function Information Not Displayed [Entertainment System [With Center Display]] >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
Step Inspection Action
1 VISUALLY INSPECT SD CARD 
  • Visually inspect the SD card for looseness or damage.
  • Is the SD card normal?
 Yes Go to the next step.
No System is normal. (explain to the customer that there is a malfunction in SD card)
2 VERIFY IF MALFUNCTION CAUSE IS MOBILE DEVICE SETTING SUCH AS SMARTPHONE 
  • After obtaining the customer's consent, verify that the Wi-Fi™ connection setting for the mobile device such as a Smartphone is turned on.
  • Is the Wi-Fi™ connection setting turned on?
 Yes Go to the next step.
No Turn on the Wi-Fi™ connection setting for the mobile device, then go to Step 12.
3 VERIFY IF MALFUNCTION CAUSE IS CMU SETTING 
  • Verify that the CMU Wi-Fi™ connection setting is turned on.
  • Is the CMU Wi-Fi™ connection setting turned on?
 Yes Go to the next step.
No Turn on the CMU Wi-Fi™ connection setting, then go to Step 12.
4 VERIFY IF MALFUNCTION CAUSE IS OBSTRUCTION SUCH AS BUILDING 
  • Set the mobile device such as a Smartphone and the CMU Wi-Fi™ connection setting to on when the malfunction occurred.
  • Select the navigation mode by operating the center display or the commander switch.
  • Move the vehicle to an area where the mobile device such as a Smartphone can receive radio waves.
  • Is information such as gas prices, weather, and the nearest restaurant displayed?
 Yes System is normal (explain to the customer that Wi-Fi™ communication could not be received normally due to driving in an area with tunnels or obstructions).
No Go to the next step.
5 DETERMINE IF MALFUNCTION CAUSE IS MOBILE DEVICE SUCH AS SMARTPHONE 
  • After obtaining the customer's consent, set the CMU Wi-Fi™ connection setting using a mobile device such as a Smartphone not used when the malfunction occurred.
  • Select the navigation mode by operating the center display or the commander switch.
  • Move the vehicle to an area where the mobile device such as a Smartphone can receive radio waves.
  • Is information such as gas prices, weather, and the nearest restaurant displayed?
 Yes System is normal (explain to customer that the cause is mobile device malfunction such as Smartphone).
No Go to the next step.
6 INSPECT AUXILIARY JACK/USB PORT/SD CARD SLOT HUB CONNECTOR 
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 12.
7 INSPECT CMU CONNECTOR 
  • Disconnect the CMU connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 12.
8 VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN CMU AND AUXILIARY JACK/USB PORT/SD CARD SLOT HUB 
  • Verify that the auxiliary jack/USB port/SD card slot hub and the CMU connector are disconnected.
  • Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side).
    • CMU terminal 4A and auxiliary jack/USB port/SD card slot hub terminal 2A
  • 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.
    • CMU terminal 4A and auxiliary jack/USB port/SD card slot hub terminal 2A

      If there is a common connector: 

      • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
      • Repair or replace the malfunctioning location.

      If there is no common connector: 

      • Repair or replace the wiring harness which has an open circuit.
  • Go to Step 12.
9 VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT TO GROUND IN WIRING HARNESS BETWEEN CMU AND AUXILIARY JACK/USB PORT/SD CARD SLOT HUB 
  • Verify that the auxiliary jack/USB port/SD card slot hub and the CMU connector are disconnected.
  • Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground.
    • Auxiliary jack/USB port/SD card slot hub terminal 2A
    • Auxiliary jack/USB port/SD card slot hub terminal 2B
    • Auxiliary jack/USB port/SD card slot hub terminal 2D
  • Is there continuity?
 Yes
  • Refer to the wiring diagram and verify if there is a common connector between the following terminals.
    • CMU terminal 4A and auxiliary jack/USB port/SD card slot hub terminal 2A
    • CMU terminal 4B and auxiliary jack/USB port/SD card slot hub terminal 2B
    • CMU terminal 4D and auxiliary jack/USB port/SD card slot hub terminal 2D

      If there is a common connector: 

      • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
      • Repair or replace the malfunctioning location.

      If there is no common connector: 

      • Repair or replace the wiring harness which is shorted to ground.
  • Go to Step 12.
No Go to the next step.
10 VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT TO POWER SUPPLY IN WIRING HARNESS BETWEEN CMU AND AUXILIARY JACK/USB PORT/SD CARD SLOT HUB 
  • Verify that the auxiliary jack/USB port/SD card slot hub and the CMU connector are disconnected.
  • Reconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)

  • Switch the ignition to ACC or ON (engine off or on).
  • Measure the voltage at the following terminals (vehicle wiring harness side).
    • Auxiliary jack/USB port/SD card slot hub terminal 2A
    • Auxiliary jack/USB port/SD card slot hub terminal 2B
    • Auxiliary jack/USB port/SD card slot hub terminal 2D
  • Is the voltage B+  ?
 Yes
  • Refer to the wiring diagram and verify if there is a common connector between the following terminals.
    • CMU terminal 4A and auxiliary jack/USB port/SD card slot hub terminal 2A
    • CMU terminal 4B and auxiliary jack/USB port/SD card slot hub terminal 2B
    • CMU terminal 4D and auxiliary jack/USB port/SD card slot hub terminal 2D

    If there is a common connector: 

    • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location.
    • Repair or replace the malfunctioning location.

      If there is no common connector: 

    • Repair or replace the wiring harness which is shorted to the power supply.
  • Go to Step 12.
No Go to the next step.
11 DETERMINE IF MALFUNCTION CAUSE IS AUXILIARY JACK/USB PORT/SD CARD SLOT HUB 
 Yes Troubleshooting completed (explain the contents of the servicing to the customer).
No Replace the CMU, then go to the next step.
(See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION .)
12 VERIFY IF MALFUNCTION CAUSE IS CORRECTED 
  • Switch the ignition to ACC or ON (engine off or on).
  • Set the mobile device such as a Smartphone and the CMU Wi-Fi™ connection setting to on when the malfunction occurred.
  • Select the navigation mode by operating the center display or the commander switch.
  • Move the vehicle to an area where the mobile device such as a Smartphone can receive radio waves.
  • Is information such as gas price, weather, nearest restaurant displayed?
 Yes Troubleshooting completed (explain the contents of the servicing to the customer).
No Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis.
(See SYMPTOM TROUBLESHOOTING [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]] .)
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