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 START STOP UNIT DTCs Retrieve the start stop unit DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT] .) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [START STOP UNIT] .)
1		No	Go to the next step.
2	VERIFY IF MALFUNCTIONING LOCATION IS START STOP UNIT DEPENDING ON REPEATA Clear the DTC for the radar unit using the M-MDS. (See CLEARING DTC [RADAR UNIT] .) Switch the ignition ON (engine on) and wait for 10 min or more. Retrieve the radar unit DTCs using the M-MDS. (See DTC INSPECTION [RADAR UNIT] .) Is the same DTC displayed?	Yes	Replace the start stop unit, then go to the next step. (See START STOP UNIT REMOVAL/INSTALLATION .)
2		No	Go to the next step.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Clear the DTC for the radar unit using the M-MDS. (See CLEARING DTC [RADAR UNIT] .) Switch the ignition ON (engine on) and wait for 10 min or more. Retrieve the radar unit DTCs using the M-MDS. (See DTC INSPECTION [RADAR UNIT] .) Is the same DTC displayed?	Yes	Replace the radar unit, then go to the next step. (See RADAR UNIT REMOVAL/INSTALLATION .)
3		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 [RADAR UNIT] .)
4		No	DTC troubleshooting completed.