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1990 Toyota Camry CHECK ENGINE LIGHT

Tiny
WILDBILL347
  • MEMBER
  • 1990 TOYOTA CAMRY
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
I tried the method described in the Haynes manual to read the trouble codes. Found trouble code 22 and corrected problem with sensor. I tried to reset the Computer but forgot to remove the jumper wire before starting the engine (my idiotic fault). Now the check engine light stays on all the time. I tried again to read the codes using the same method and the check engine light stayed on without flashing (apparently indicating no error codes present). So I disconnected the negative battery terminal and left it off for at least 10 minutes. The check engine light remains on all the time. Did I fry my ECM? Is there something I can do to fix this?

Thank you for your help.
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Thursday, November 19th, 2015 AT 12:15 PM

10 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try the three things in pics that may make light go out.
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Thursday, November 19th, 2015 AT 12:31 PM
Tiny
WILDBILL347
  • MEMBER
  • 6 POSTS
I tried the second method of removing the fuse with no results. I will check TE1 voltage etc. And let you know. Thanks for the help.
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Thursday, November 19th, 2015 AT 12:55 PM
Tiny
WILDBILL347
  • MEMBER
  • 6 POSTS
Voltage at TE1 is 11.2 volts. E1 has continuity to ground. I tried method 3 and put in "test mode" again and turned key off. Check engine light still on all the time. Any other suggestions?

Thanks again for your help.
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Thursday, November 19th, 2015 AT 1:17 PM
Tiny
WILDBILL347
  • MEMBER
  • 6 POSTS
Voltage at TE1 is 11.2 volts. E1 has continuity to ground. I tried method 3 and put in "test mode" again and turned key off. Check engine light still on all the time. Any other suggestions?

Thanks again for your help. I have to leave now but will check in later for your reply. Have a blessed evening.
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Thursday, November 19th, 2015 AT 1:19 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Did you do the very first one that says to check e for ground and if no ground a wire is bad probably and to ground to battery you might want to groundto battery anyhow. Otherwise you'll have to have a guy look at this as it may be a prom if it has one or the ecu.
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Thursday, November 19th, 2015 AT 4:30 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
One other thing make sure your battery is in good condition including load test as well as charging system. Make sure all components are off as well like ac and lights, etc.
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Thursday, November 19th, 2015 AT 4:43 PM
Tiny
WILDBILL347
  • MEMBER
  • 6 POSTS
I checked E to ground. OK. Grounded terminal E with jumper. Tried to reset light by removing negative battery terminal for 15 minutes and pulling the main fuse to EFI (15amp) and the EFI Relay. Engine runs great and getting 33 mpg. Any other hints or have I screwed up my ECU.

Thanks again for the help.
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Thursday, November 19th, 2015 AT 8:32 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Nothing that I can think of if it's running ok unless there is another code in it is only reason I can think of car keeping light on. If you aren't satisfied I can get your donation back. But they may have another pro look at it first.
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Friday, November 20th, 2015 AT 7:11 AM
Tiny
WILDBILL347
  • MEMBER
  • 6 POSTS
I do NOT want my donation back. I appreciate your attempts even though we haven't solved the problem yet. I would appreciate it if someone else gave their input and maybe another tech has an idea that we haven't thought of. Thanks again for the help.
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Friday, November 20th, 2015 AT 7:18 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I have sent this in to get more help
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Friday, November 20th, 2015 AT 1:03 PM

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