Jump to content

Sync signal missing


David Linton

Recommended Posts

Hi, I'm trying to run a Link V5 on a Toyota Starlet with a 1NZ-FE 1500cc engine. The ecu was with your company a few months ago and the sub board was replaced/configured(Jugen??). I believe the engine uses reluctor trigger sensors for the crank and cam positions but I am not getting any SCE entires while monitoring the ecu when attempting to start the car. With a multimeter, I do see a "signal change" at the ecu plug when cranking the engine. Someone had suggested the ecu needs to be calibrated with the trigger sensors but we aren't sure. Can you advise us please or point us in the right direction? Thank you.

Link to comment
Share on other sites

Hi David.

Try checking the polarity of the reluctor sensors and that the wiring is correct for them as per the manual.  Also given you have SUBTOY36 decoding and a dual reluctor sub-board, you most definately will need to check at least one of the dip switches on the sub-board is turned to 'on'.  These dip switches can be used to influence a retard/advance value.

 

Jurgen

Link to comment
Share on other sites

Sorry for spelling your name wrong, Jurgen. The factory ecu has the sensors with twin core shielded - black wire, white wire and a shield. The black wire appears to be the "signal" wire as the white wire from both the crank sensor and the cam sensor are tied together at the ecu. This is the way I have wired it. David (Ralf) has just informed me of the switches but I don't remember seeing any mention of dip switches within his manual. I'll look to download a newer version and have a read tonight. He also said there is a sub-menu regarding the polarity of the triggers which I'll look at as well. David.

Link to comment
Share on other sites

Are some symptoms to your problem including trigger inputs that are menial (1-2v or lower), ignition out very weak or non-existent, does the ECU count errors?  Each reluctor has it's +ve side and -ve side, and the way you have it wired currently sounds correct. 

Inside the ECU the power and signal grounds are not commoned, meaning even though you have a power ground, the reluctor grounds will be floating.  As they need a reference voltage, check you have actually tied the common of these reluctors via the loom to the chassis/block and that all your earthing positions are clean and tight. 

To test it, leave everything as you have it and strap the 'signal ground' wire from the ECU with a clip lead to the chassis as well.

Let me know if this helps.

Jurgen

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...