Inner Rear View Mirror Assembly 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 (INNER REAR VIEW MIRROR ASSEMBLY BRANCH LINE)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the M4 inner rear view mirror assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition M4-9 (CANH) - M4-10 (CANL) 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 (INNER REAR VIEW MIRROR ASSEMBLY)
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
- Check the inner rear view mirror assembly power source circuit.
Refer to The Camera Indicator is not Displayed [11/2021 - ]
Result
Result OK NG
Result:
OK
REPLACE INNER REAR VIEW MIRROR ASSEMBLY. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
- Check the inner rear view mirror assembly power source circuit.