"Other sensors existed to check whether it was giving correct data or not (and would have shown it was giving false data), but were ignored"
Japan has had a _lot_ of missions fail and still doesn't seem to be accepting the idea that juniors can/SHOULD query seniors' work.
In every single case all the paperwork is correct, every documented step has been doublechecked and signed off on, etc. The critical mistakes are baked-in from the outset with no thought given to questioning the spec. Experience shows that when things go wrong in japanese technology there's a LOT of coverup going on afterwards which frequently compounds the "what went wrong" from fixable to disaster scale - one example being Fukushima, which could have been a whole lot worse if the senior engineer onsite hadn't finally broken his conditioning, told Tepco management to go fuck themselves and started doing the stuff which needed to be done to save the plant (If manglement hadn't blocked him from the outset, there may not have been meltdowns or hydrogen explosions). Monju is another example of a japanese clusterfuck, then there's the Mitsubishi wheel bearing scandal on a more mundane level.
There's an egrarious cultural failure that needs addressing, starting with the institutionalised bullying within the japanese education system where the "odd kid out" gets the crap beaten out of him from a very early age (5-6 years old) whilst the teacher looks on and does nothing - it's taught from a very early age that you will conform OR ELSE, you will not ask questions OR ELSE and you will accept what you are told by your seniors OR ELSE.
The militaristic cultural model needs fixing. Until Japan faces that reality they'll keep breaking spacecraft and failing to learn from it.