DTC B2275-11: Starter Circuit Short to Ground; DTC B2275-12: Starter Circuit Short to Battery [11/2021 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is stored when a malfunction is detected in the starter circuit inside the certification ECU (smart key ECU assembly).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2275-11	Starter Circuit Short to Ground	Certification ECU (smart key ECU assembly) internal HV activation request output circuit malfunction or external circuit malfunction (1-trip detection logic*)	Certification ECU (smart key ECU assembly) Hybrid vehicle control ECU Wire harness or connector	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait 10 seconds or more, then start the hybrid control system 3 times.
B2275-12	Starter Circuit Short to Battery	Certification ECU (smart key ECU assembly) internal HV activation request output circuit malfunction or external circuit malfunction (1-trip detection logic*)	Certification ECU (smart key ECU assembly) Hybrid vehicle control ECU Wire harness or connector	DTC Output Confirmation Operation: Turn the ignition switch to ON and wait 10 seconds or more, then start the hybrid control system 3 times.

*: Only detected while a malfunction is present and the ignition switch is ON.

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
The power source mode changes to ON (READY) even though the hybrid control system is not started. The power source mode does not change to ON (READY) even though the hybrid control system is started.	-

RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC No.	Data List and Active Test
B2275-11 B2275-12	-