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No check engine light not cranking

Tiny
POBUBBA
  • MEMBER
  • 1999 TOYOTA COROLLA
  • 180 MILES
Replaced ecm, identical numbers, replaced crankshaft position sensor, no check engine light coming on at ignition on position, unable to link obd scanner so no codes, constantly says link error, no spark or fuel, efi fuse/relay checked, only have power to one of the terminals on both efi relay and efi fuse, from reading somewhere else on this forum I should have power to 2 on relay and fuse terminals Merlin 2021 was the expert but I am unable to get a hold of him-anyone else know the solution, I believe in merlin2021 post he had the solution to the wiring issue-please help
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Monday, June 18th, 2012 AT 6:35 PM

15 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
At data link connector check for voltage on Black wire pin #12 key on

When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

this guide will help

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.
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Monday, June 18th, 2012 AT 6:59 PM
Tiny
POBUBBA
  • MEMBER
  • 6 POSTS
Hi, just looked, only black and white- brown- white top row, red on bottom row- no power from any with key in on position, I just checked and got power to two of the efi relay terminals with relay removedm also rewd wire in obd connector gains power when efi relay is removed?
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-2
Monday, June 18th, 2012 AT 7:18 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check fuse Ignition switch in underdash box 7.5 amp
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Monday, June 18th, 2012 AT 7:33 PM
Tiny
POBUBBA
  • MEMBER
  • 6 POSTS
Docfixit, checked that fuse, its ok, all fuses in vehicle under dash checked out and all working
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Monday, June 18th, 2012 AT 8:00 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Used or new computer?

If used, will not work as it has to be flashed to your vin.

If new, did you have it flashed?

Can you get any info with a code reader?

Roy
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Monday, June 18th, 2012 AT 11:19 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
OBD-II terminal # 16 must be hot at all times.
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Tuesday, June 19th, 2012 AT 3:29 PM
Tiny
POBUBBA
  • MEMBER
  • 6 POSTS
Hi KHLow2008, no pins are hot unless I remove efi relay
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Tuesday, June 19th, 2012 AT 4:14 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
That means you have a power supply failure to the pin.
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Tuesday, June 19th, 2012 AT 6:11 PM
Tiny
POBUBBA
  • MEMBER
  • 6 POSTS
How do I find out what pin #16 is, is there a diagram available or what colour would the feed cable to the terminal be
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Tuesday, June 19th, 2012 AT 6:46 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
At the narrower side of the connector, the end pin is # 16.
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Tuesday, June 19th, 2012 AT 6:54 PM
Tiny
POBUBBA
  • MEMBER
  • 6 POSTS
Just tried something I found on another forum, I removed the 16 pin(middle) connector from ecm, cel light comes on and car starts right up, reconnect this plug and car stops and just cranks after that, got a few codes when connector was out but I have airbox removed P0110, P0105, P0115, P0120, with connector disconnected I still have no hot pins on obd11 connector
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Tuesday, June 19th, 2012 AT 7:00 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You need to check the fuses and wiring to the pin.
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Tuesday, June 19th, 2012 AT 7:15 PM
Tiny
JERICHO FOX
  • MEMBER
  • 4 POSTS
I have the same problem also on my 2009 toyota corolla. No check engine light. After I clean the ECM board with contact cleaner. There is no mil light and obd link error. But if I put 12v supplied to blue wire on efi relay obd is working. But no codes appears.
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Wednesday, October 19th, 2016 AT 10:16 AM
Tiny
JERICHO FOX
  • MEMBER
  • 4 POSTS
Can anyone give me the ecm ignition pin out for 2009 toyota corolla 1.8 G manual transmission. Thank you.
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Wednesday, October 19th, 2016 AT 10:23 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am attaching the pinout information for this vehicle. Unfortunately, they don't have a connector view, so we are left with this diagram view.

Please let us know what info you need.

Thanks
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Monday, December 6th, 2021 AT 5:31 PM

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