SUBARU DTC 6532 ELECTRIC POWER STEERING ecu internal failure peripheral circuit

Darren Technician Wisconsin Posted   Latest  
Unsolved
Electrical
2016 Subaru Forester 2.0XT Limited 2.0L (FA20F) (TR580)
Loses Power Steering

Need a path for diagnostics, problem is intermittant.

service info is severely lacking.

dtc definition is inherently contradictive.

just need a starting point, besides powers, grounds and data lines…

the code is in the power steering unit control module, and there are no other codes.

control module is under the hood, all passes visual inspection.

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Paul Owner/Technician
California
Paul
 

Is there freeze frame data? If so, check for low battery voltage (assuming the PID is available). I haven't seen this code, but frequently when I see checksum type codes, I'll find low battery voltage is the cause. I'll check the code description and see if I have any luck making sense of it.

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Paul Owner/Technician
California
Paul
 

By the way, I think Darren meant C2532, not 6532

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Paul Owner/Technician
California
Paul
 

Yikes! You found a DTC definition? I was only able to infer what the issue might be based on the flow chart. So, it doesn't look like a checksum code, which was my original assumption. It looks like there is an issue with the power steering motor, wiring, or control unit. The 3 phase cable for the motor is hard wired to the motor, and has a connector at the control unit. The procedure is to…

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Darren Technician
Wisconsin
Darren
 

Will do thank you

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Sherman Owner
Texas
Sherman
 

Do a voltage drop test!!!!!! Clean the battery terminals and the ground mount points under hood!!! Just Do It! Then put your oscilloscope on the CAN high and low. Turn on the math channel and choose “A+B” and look for spikes across the 5 volt line while turning the steering wheel and observing the patterns.

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Darren Technician
Wisconsin
Darren
 

Good advice thanks

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John Technician
New Jersey
John
   

Theres a TSB for this, 04-24-18-1. There is an internal relay in control module that fails. Requires a new control module.

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Darren Technician
Wisconsin
Darren
 

That’s golden!!! Thanks

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Fred Owner/Technician
Maryland
Fred
 

Make sure the ground is bonded to the car body ,had one that had body work and the paint kept the ground from being a good ground to the body .

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