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 the ignition is switched off after a specified time has elapsed or the vehicle has been driven for a specified period of time or more while in the failsafe mode, the ignition will remain switched 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 with the steering wheel locked. 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 Entry Malfunction" is displayed in the center display (with center display) and the KEY warning light (red) illuminates and the push button start indicator light (amber) flashes.
  • Switch the ignition to ACC or ON (engine off or on).
  • Depress the brake pedal (AT)/clutch pedal (MT).
• In addition to the normal engine starting operation for cranking the engine in fail-safe mode, it is necessary to long-press the push button start until the engine starts.

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 the ignition is switched off after a specified time has elapsed or the vehicle has been driven for a specified period of time or more while in the fail-safe mode, the ignition will remain switched off and the engine cannot be started.
Possible cause	Start stop unit internal malfunction
System wiring diagram	Not applicable