CRANKS BUT WONT START- NO CHECK ENGINE LIGHT AT IGN ON, UNABLE TO LINK SCANNER

1999 Toyota Corolla

Tiny

pobubba

June, 18, 2012 AT 6:35 PM

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

FOUND 16895 RELATED QUESTIONS

12 Answers

Tiny

Docfixit

June, 18, 2012 AT 6:59 PM

At data link connector check for voltage on Black wire pin #12 key on

Tiny

pobubba

June, 18, 2012 AT 7:18 PM

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?

Tiny

Docfixit

June, 18, 2012 AT 7:33 PM

Check fuse Ignition switch in underdash box 7.5 amp

Tiny

pobubba

June, 18, 2012 AT 8:00 PM

Docfixit, checked that fuse, its ok, all fuses in vehicle under dash checked out and all working

Tiny

ASEMaster6371

June, 18, 2012 AT 11:19 PM

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

Tiny

KHLow2008

June, 19, 2012 AT 3:29 PM

OBD-II terminal # 16 must be hot at all times.

Tiny

pobubba

June, 19, 2012 AT 4:14 PM

Hi KHLow2008, no pins are hot unless I remove efi relay

Tiny

KHLow2008

June, 19, 2012 AT 6:11 PM

That means you have a power supply failure to the pin.

Tiny

pobubba

June, 19, 2012 AT 6:46 PM

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

Tiny

KHLow2008

June, 19, 2012 AT 6:54 PM

At the narrower side of the connector, the end pin is # 16.

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