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RX400H Suddenly Stopped while driving


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Hi,

I have Lexus RX400H 2008 model (Toyota Harrier Hybrid), the issue is the vehicle stopping while driving, then it shows Check VSC system and Hybrid control system. I faced this many times. While driving vehicle suddenly disengage driving and can't control steering wheel. Since the vehicle still moving can be park with saftly. Then swich off ignition and then switch on all the errors are fixed. 

So have done following things but issue is still the same.

*. Changed the normal Battery.

* Changed the hybrid Battery.

* Change the Hybrid Battery control module.

* Change the temparature sensors.

* Swaped with same inveter.

Non of above method worked. I am in very curious situation what to do next. It seems issue is with power steering or hybrid system. 

Can anyone give your valuble ideas on this issue. 

B1F399BA-C722-4D7C-A07C-0752D338F6D8.png

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Take it to the dealership and get the error codes read, or at very least a hybrid health check. If you really have done all you listed here you have no problems spending money! 

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2 hours ago, NemesisUK said:

Take it to the dealership and get the error codes read, or at very least a hybrid health check. If you really have done all you listed here you have no problems spending money! 

Dealerships can vary in their helpfulness with imports. You may have more luck at a Toyota dealer than a Lexus one. You certainly won't be able to get an official HCC as the system won't recognise the reg/VIN they enter at the start when performing the test, but the individual tests can all be carried out just using Techstream anyway so they should be able to diagnose the problem.

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7 hours ago, Gayan Ranasinghe said:

Hi,

I have Lexus RX400H 2008 model (Toyota Harrier Hybrid), the issue is the vehicle stopping while driving, then it shows Check VSC system and Hybrid control system. I faced this many times. While driving vehicle suddenly disengage driving and can't control steering wheel. Since the vehicle still moving can be park with saftly. Then swich off ignition and then switch on all the errors are fixed. 

So have done following things but issue is still the same.

*. Changed the normal battery.

* Changed the hybrid battery.

* Change the Hybrid battery control module.

* Change the temparature sensors.

* Swaped with same inveter.

Non of above method worked. I am in very curious situation what to do next. It seems issue is with power steering or hybrid system. 

Can anyone give your valuble ideas on this issue. 

B1F399BA-C722-4D7C-A07C-0752D338F6D8.png

Have you, or has anyone, done any proper diagnostic fault-finding on this car or are you just throwing money and parts at it and hoping that something will work at some point?

The error messages are just an indication that something, somewhere, is going (or gone) faulty. This is the sign that you need to take it to a Lexus dealer or any other garage that has access to Techstream to have the OBD codes read. You could even do it yourself with a generic code reader, but Techstream is the same diagnostic software used by the techs in the Lexus dealer workshops.

Even when you get a code, even that is not guaranteed to be the fault itself, merely just the starting point for more in-depth diagnostics. For instance, code P0AA6 covers SIX possible problem areas. Generic code readers would probably stay at that, but Techstream goes further by also giving sub-codes and narrowing it down more. For example, P0AA6-123* points to one thing; P0AA6-124* points to a different thing; P0AA6-125* something else again, and so on.

*Not real sub-codes, just for illustration.

So, you need to have the codes read and then come back to tell us what they are and maybe we can help, but until then it's all just random guesswork.

 

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