Hello members,
I drive an RX 400h (2007).
The 12V battery (installed 10 months ago as new (genuine Toyota 45Ah) is having a current draw.
The hybrid expert has carried out a full diagnostics.
Error codes I’ve got: B1421, B1424 (solar sensor circuit). It could be about poor lighting conditions when the test was carried out (as far as I know).
Code C1546 (malfunction in HV ECU).
Permanent, undeletable codes. The car is running well. Voltage drops on the 12V battery to 12.25V from 12.6V after 2 days of no use.
When the car is in READY state, the reading on 12V battery is 14.4V, so charging is OK.
The HV battery cells are in perfect condition according the diagnostics. And every other components, aswell.
Question: is it really a problem with the HV ECU, or could be something else?
Thank you in advance
