Steering wheel will not turn

Tiny
NG?C HOàNG
  • MEMBER
  • 2009 LEXUS IS 250
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 39,000 MILES
This car replaced a new power steering gear assembly and power steering ECU. However, when I start engine, steering wheel cannot turn, it seems locked. Can you give me suggests to repair this problem?
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Wednesday, May 24th, 2017 AT 7:16 PM

10 Replies

Tiny
JIS001
  • EXPERT
After replacing the steering ECU you will need to INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT. For this procedure you need a compatible scan tool but I believe you may have another issue?

Why did you replace the gear and ECU? If it was for a hard steering then you may have misdiagnosis the problem? First thing to check is the 80 AMP EPS fuse to see if it blew out? If that is ok then check ALL YOUR FUSES RELATED TO ECU!

If the ECU module has no power you will not have steering. If your checks are ok then you would need to check all your wiring and you would need to verify your power and grounds are ok to the ECU.

If the task is overwhelming then I would recommend you take it in to a professional or your nearest dealership. Let us know what you find or if you need wiring diagrams for diagnosis.
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Wednesday, May 24th, 2017 AT 10:16 PM
Tiny
NG?C HOàNG
  • MEMBER
Thaks for your suggest. The reason that we replace new power steering because the car was locked when owner came back the car and he called another mechanic, then I dont know how did he repair and the car not lock. But turning steering wheel is hard. Then owner called us to tow his car to us garage. We checked and requested to replace power steering and ecu because the mechanic damaged it before. We have checked CAN and related. We changed gateway ecu and power steering ecu. But it's the same. We checked 80 amp eps fuse like you said and related to ecu. So I need some solutions. Thanks you so much.
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Thursday, May 25th, 2017 AT 8:47 AM
Tiny
JIS001
  • EXPERT
So is the steering hard to turn or is the steering column locked where you can not turn the wheel at all?
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Thursday, May 25th, 2017 AT 10:14 PM
Tiny
NG?C HOàNG
  • MEMBER
It is locked when I start the engine.
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Thursday, May 25th, 2017 AT 11:58 PM
Tiny
KEN
  • ADMIN
Hello,

Are there any trouble codes?

Please let us know

Cheers, Ken
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Monday, May 29th, 2017 AT 12:49 PM
Tiny
JIS001
  • EXPERT
Well it sounds like the steering column lock will not unlock. If you have a compatible scanner you should see some codes in the steering lock ECU and see parameters to verify the ECU is sending the signal to unlock?

If you do not have that capability then I would recommend you sublet the repair to a shop that has the right equipment for it. Also since you did repairs with the rack you still need to do the zero point calibration.
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Saturday, June 3rd, 2017 AT 6:39 PM
Tiny
NG?C HOàNG
  • MEMBER
There is no any problem code. And I finded a problem related momen sensor jack. But im not sure. Can you give me suggest
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Tuesday, June 6th, 2017 AT 5:53 AM
Tiny
JIS001
  • EXPERT
When looking at the steering lock ecu can you see if the inlock command is been sent to the lock. If it is then the lock will most likely be your failing part.

You would need to inspect the wiring first to make sure the harness has not been damaged or chaffing.
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Friday, June 9th, 2017 AT 2:09 PM
Tiny
NG?C HOàNG
  • MEMBER
Can you let me know what can I inspect?Because I had inspected electronic system and CAN wireless carefull.
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Saturday, June 10th, 2017 AT 8:50 PM
Tiny
JIS001
  • EXPERT
As stated on earlier post, you need to liok at your data for steering lock module to verify that the unlock command is being sent. Can you see that data?
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Sunday, June 11th, 2017 AT 2:36 PM

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