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Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Stop And Start System - Diagnostic Codes (1 Of 2) >> Stop And Start System >> DTC P0615-62: Starter Relay Signal Compare Failure [11/2021 - 03/2023] >> Confirmation Driving Pattern
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Confirmation Driving Pattern

HINT: 

DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

  1. CONFIRMATION AFTER TROUBLESHOOTING 

    HINT: 

    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

    • If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
    • Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
    1. Clear the DTCs.

      Powertrain > Stop and Start > Clear DTCs 

    2. Start the engine and warm it up.
    3. Drive the vehicle at 7 km/h (4.3 mph) or more.
      WARNING:

      When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

    4. Depress the brake pedal and stop the vehicle.
    5. Keep the engine stopped by stop and start control. (Keep the shift lever in D.)
    6. Release the brake pedal with the shift lever in D to start the engine.
    7. Check that no DTCs are output.

      Powertrain > Stop and Start > Trouble Codes 

  2. STOP AND START SYSTEM OPERATION CHECK 

    Refer to OPERATION CHECK [11/2021 - ]

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