DTC U3000-49: Start Stop Unit Internal Malfunction [Start Stop Unit]: Notes

WARNING:

If this DTC is detected, the system will enter the fail-safe function to ensure safety. If a specified period of time has elapsed or the vehicle has been driven for a specified period of time or more while in fail-safe mode, the ignition will remain stuck in off and the engine cannot be started. Therefore, perform the malfunction diagnosis while the engine can be started. In addition, after having performed the malfunction diagnosis, verify that this DTC is not detected. If the DTC is not detected, the system returns to normal from the fail-safe function.

NOTE:

If the vehicle is in the following condition while in fail-safe mode, "Keyless system malfunction" is displayed in the multi-information display (Instrument cluster (Type A or B))/the KEY warning light (red) illuminates (Instrument cluster (Type C)) and the push button start indicator light (amber) flashes.

In addition to the normal engine starting operation while cranking the engine in fail-safe mode, it is necessary to press the push button start.

Courtesy of MAZDA MOTORS CORP.

DTC U3000:49 [START STOP UNIT] DETECTION CONDITION AND POSSIBLE CAUSE

Description	Start stop unit internal malfunction
Detection condition	Start stop unit detects the internal malfunction.
Fail-safe	The system will enter the fail-safe function to ensure safety. If a specified period of time has elapsed or the vehicle has been driven for a specified period of time or more while in fail-safe mode, the ignition will remain stuck in off and the engine cannot be started.
Possible cause	Start stop unit internal malfunction
System wiring diagram	Not applicable