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Distributor adjust

Tiny
JPMISME1998
  • MEMBER
  • 1989 TOYOTA PICKUP
  • 3.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
While attempting to adjust the distributor. Bridging the Te1 and T1 fails to flash the diagnostic mode. The bulb for the check engine light is good, lights up on the dash on engine start up. But fails to stay on to indicate no codes when the pins are bridged. Does not flash any codes at all for that matter.
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Monday, June 6th, 2022 AT 11:43 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
I would check the EFI relay and fuse, if okay the ECU could be bad. here is a wiring diagrams for the system with a guide to help check it out:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what happens.
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Monday, June 6th, 2022 AT 8:59 PM
Tiny
JPMISME1998
  • MEMBER
  • 3 POSTS
Hi, sorry for getting back so late. Finally had some free time to work on the truck. Checked all fuses and the relay. Also pulled the ECU doesn't look like any capacitors swelled or anything on a quick little look. Anything else I can do to further narrow it down to a bad ECU or something else?
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Sunday, June 12th, 2022 AT 3:54 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
If you have checked the wiring with the guide above and everything looks okay, I would try a rebuilt ECU. Make sure the ECU is getting power and ground.

Electronic Control Unit (ECU): Lower R.H. Side of instrument panel.

Please let us know what happens.
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Monday, June 13th, 2022 AT 8:45 AM
Tiny
JPMISME1998
  • MEMBER
  • 3 POSTS
We got a new ECU in. Swapped that out and got everying working. Thank you so much for your help.
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Thursday, July 7th, 2022 AT 1:44 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Nice work, we are here to help, please use 2CarPros anytime. Can you please leave us a rating? (Copy entire link)

https://www.google.com/search?q=2carpros&gs_ivs=1#lrd=0x80dcd47364be5d0d:0xba091aa4209f4497,1,,,&tts=0

and

https://www.sitejabber.com/reviews/2carpros.com

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Saturday, July 9th, 2022 AT 9:41 AM

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