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! Warning Symbol

Tiny
OLAF
  • MEMBER
  • 2001 TOYOTA PRIUS
  • 1.5L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 110,000 MILES
I have a red car with exclamation on the dashboard. The battery and PS symbols are not highlighted, and there is no "check engine" light, or any other warning light. The car starts and runs fine. 2 fancy OBD2 readers show no codes, and all other checks show green, including 02 measurements. I have erased the warning with OBD2 reader, and by disconnecting 12 volt battery, but warning symbol returns immediately even without starting engine. I have checked all fuses, and switched relays around. Is this a bad ECU, or what?
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Monday, January 5th, 2015 AT 9:38 AM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Here is a video to help you scan the CAN system of the car which is the future of automotive repair. You can get a scanner for about 40.00 on Amazon. It sounds like the hybrid battery is having an issue.

https://youtu.be/InIlnsjOVFA

Please run down this guide and report back.
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Monday, January 5th, 2015 AT 4:21 PM
Tiny
OLAF
  • MEMBER
  • 4 POSTS
Would not an ABS problem be highlighted by the panel alarm sign, or an error code? When I turn on the key the ABS alarm shows, but immediately turns off when the engine turns over. The brakes are fine on this car.
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Monday, January 5th, 2015 AT 4:27 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Regardless of an abs problem your brakes would feel no different and codes only show up with a CAN scanner not auto parts ones. We don't have dash symbols in our manual so get it scanned if there is a problem the scanner may say what it is.
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Monday, January 5th, 2015 AT 4:34 PM
Tiny
OLAF
  • MEMBER
  • 4 POSTS
Well, I will try a CAN scanner or whatever special tool that is. I thought that the two scanners employed were professional enough such that they would show any code that the car computer created in answer to the panel alarm. No codes ever appeared. My understanding of how codes function is to give a more specific answer to a general alarm. Wow!
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Monday, January 5th, 2015 AT 4:44 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Here is how you replace the hybrid battery
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Tuesday, January 6th, 2015 AT 6:34 AM
Tiny
OLAF
  • MEMBER
  • 4 POSTS
Thanks you so much for the instructions I got a rebuilt battery for 850.00 all fixed. I love this site.
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Tuesday, January 6th, 2015 AT 8:06 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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Tuesday, January 6th, 2015 AT 9:23 AM

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