DTC P0606-29: Backup Boost Converter "A" Control CPU Signal Invalid [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BATTERY)
Pre-procedure1
- Disconnect the engine stop and start ECU connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition Result A24-1 (BIN2) - Body ground Always 9.5 to 14 V V A24-3 (BIN1) - Body ground Always 9.5 to 14 V V Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
Pre-procedure1
- Disconnect the engine stop and start ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result A24-2 (GND2) - Body ground Always Below 1 Ω Ω A24-8 (GND1) - Body ground Always Below 1 Ω Ω Result
Proceed to OK NG
Post-procedure1
- None.
Result:
OK
REPLACE ENGINE STOP AND START ECU. Refer to REMOVAL [10/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR