DTC U3000:49 [START STOP UNIT]

id0902p6024800

Warning
•  If this DTC is detected, the system will enter the fail-safe function to ensure safety. If the ignition is switched OFF (LOCK) 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. 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 and the KEY warning light (red) illuminates (without multi-information display) and the push button start indicator light (amber) flashes.
?  Switch the ignition to ACC or ON (engine off or on).
?  Depress the brake pedal.
•  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.
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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 (LOCK) 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

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY IF MALFUNCTIONING LOCATION IS START STOP UNIT DEPENDING ON REPEATABILITY
•  Clear the DTC for the start stop unit using the M-MDS.
•  Retrieve the start stop unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the start stop unit, then go to the next step.
(See START STOP UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
2
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 [START STOP UNIT].)
No
DTC troubleshooting completed.