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Shift solenoid replacement?

Tiny
BARBARA1963
  • MEMBER
  • 2006 TOYOTA YARIS
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
My. Scanner read po974 which is shift solenoid ss a control circuit high. You sent me a diagram but there are five solenoid and I need to know which on is po974 shift solenoid as a control circuit high.
Tuesday, May 9th, 2017 AT 11:10 AM

9 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More then likely the shift solenoid has failed. I attached the testing below on how to test for this code.

Also, I attached the process on how to replace the solenoid in the valve body as that is most likely going to be the issue.

Please run through this material and let us know if you have other questions. Thanks
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Tuesday, February 9th, 2021 AT 6:43 PM
Tiny
BARBARA1963
  • MEMBER
  • 99 POSTS
  • 2006 TOYOTA YARIS
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Can you tell me or show me a diagram of the location of the shift solenoid on this vehicle please? Thank you. The car runs great in reverse, but when I put it in drive it hesitates and will not change gears, has no power to go. My scanner gave me the code po974.
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The Yaris did not arrive in US until the 2008/9 time frame. But it is in the transmission on the valve body, see pictures. A transmission professional should really look at this as it may be something other than a solenoid like a clutch seal going out etc.
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
BARBARA1963
  • MEMBER
  • 99 POSTS
In the code book it says po974 is the shift solenoid ss A control circuit high, I need to know which solenoid it is out of the 5 it shows in the diagram you sent me
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Shift solenoid s1 is the one replacing that may not be the problem however.
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
BARBARA1963
  • MEMBER
  • 99 POSTS
Then what else could it be?
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Short in wiring, ecm stuck valve in valve body, try it see if it works if not have amechanic look at it.
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
BARBARA1963
  • MEMBER
  • 99 POSTS
Is there anyway you can send me a image of the valve body and location of the ecm valve on the valve body please and is the ecm valve the pressure valve?
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The ecm is a module that controls the engine and transmission. The solenoid is already in the diagram that I sent earlier top right marked s1
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Wednesday, February 10th, 2021 AT 9:29 AM (Merged)

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