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Diagnostic Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
2 PERFORM DTC INSPECTION AND VERIFY DC-DC CONVERTER MALFUNCTION
  • Clear the DTC for the DC-DC converter using the M-MDS. (See CLEARING DTC [i-ELOOP] .)
  • Start the engine.
  • Leave for 1 min while idling with no electrical load.
  • Leave for 1 min while racing with high electrical load.(DC-DC converter terminal 3A voltage is 16 V or more)
  • Switch the ignition off.
  • Switch the ignition ON.
  • Retrieve the DC-DC converter DTCs using the M-MDS. (See DTC INSPECTION [i-ELOOP] .)
  • Is the same DTC present?
 Yes Replace the DC-DC converter, then go to the next step.
(See DC-DC CONVERTER REMOVAL/INSTALLATION [i-ELOOP] .)
No Go to the next step.
3 PERFORM DTC INSPECTION AND VERIFY DC-DC CONVERTER MALFUNCTION Yes Replace the DC-DC converter, then go to the next step.
(See DC-DC CONVERTER REMOVAL/INSTALLATION [i-ELOOP] .)
No Go to the next step.
4 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [i-ELOOP] .)
No DTC troubleshooting completed.
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