Diagnostic Procedure

Step	Inspection		Action
1	PERFORM DTC INSPECTION FOR START STOP UNIT Perform the start stop unit DTC inspection using the M-MDS. (Refer to DTC INSPECTION [START STOP UNIT] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (Refer to DTC TABLE [START STOP UNIT] .) Then go to Step 3.
1		No	Go to the next step.
2	PERFORM DTC INSPECTION FOR VEHICLE CONTROL MODULE (V/C-MODULE) Clear vehicle control module (V/C-module) DTCs using the M-MDS. (Refer to CLEARING DTC [VEHICLE CONTROL MODULE (V/C-MODULE)] .) Switch the ignition ON (engine on). Perform the vehicle control module (V/C-module) DTC inspection using the M-MDS. (Refer to DTC INSPECTION [VEHICLE CONTROL MODULE (V/C-MODULE)] .) Is the same DTC present?	Yes	Replace the start stop unit, then go to the next step. (Refer to START STOP UNIT REMOVAL/INSTALLATION .)
2		No	Go to the next step.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Clear vehicle control module (V/C-module) DTCs using the M-MDS. (Refer to CLEARING DTC [VEHICLE CONTROL MODULE (V/C-MODULE)] .) Switch the ignition ON (engine on). Perform the vehicle control module (V/C-module) DTC inspection using the M-MDS. (Refer to DTC INSPECTION [VEHICLE CONTROL MODULE (V/C-MODULE)] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction does not recur, go to the next step. If the malfunction recurs, replace the vehicle control module (V/C-module). (Refer to VEHICLE CONTROL MODULE (V/C-MODULE) REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM] .) Go to the next step.
3		No	Go to the next step.
4	VERIFY THAT NO OTHER DTCs ARE PRESENT Verify other DTCs displayed. Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
4		No	DTC troubleshooting completed.