Hybrid Vehicle Control ECU Communication Stop Mode [11/2021 - ]: Procedure
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.
- CHECK FOR OPEN IN CAN BUS LINES (HYBRID VEHICLE CONTROL ECU BRANCH LINE)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the D67 hybrid vehicle control ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition D67-9 (CA1H) - D67-22 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Result
Result OK NG
Result:
NG
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU)
Result:
OK
See step 2
- CHECK HYBRID VEHICLE CONTROL ECU POWER SOURCE CIRCUIT
- Check the hybrid vehicle control ECU power source circuit.
Refer to ECU Power Source Circuit [11/2021 - ]
Result
Result OK NG
Result:
OK
REPLACE HYBRID VEHICLE CONTROL ECU. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
- Check the hybrid vehicle control ECU power source circuit.