No starter signal?

[Grenadian7mgte]

Somebody please help,I have an 88' supra that was auto and i converted it to manual.I jumped the black/blue and white/black wires on the plug that used to go to the nuetral safety switch.When i turn the key to start i hear the starter relay click but the car doesnt start,i made certain it wasnt the starter by leaving the key in the on position and jumped the starter and the car starts,but i noticed that there was no full pressure in my fpr with the key in the on position.I checked the ignition switch to see that it was sending the signal to the relay and that the relay was sending the signal out.The theft deterant system is active and i wonder if it has something to do with this?If the car is locked and i open the door the head light flash and horn go off and when i put the key in the ignition and turn the key it disables,so i know it works.Somebody help me pleeeeeeease i am going crazy!!!:cry: :cry: :cry:

 

[trydrew]

Somebody please help,I have an 88' supra that was auto and i converted it to manual.I jumped the black/blue and white/black wires on the plug that used to go to the nuetral safety switch.When i turn the key to start i hear the starter relay click but the car doesnt start,i made certain it wasnt the starter by leaving the key in the on position and jumped the starter and the car starts,but i noticed that there was no full pressure in my fpr with the key in the on position.I checked the ignition switch to see that it was sending the signal to the relay and that the relay was sending the signal out.The theft deterant system is active and i wonder if it has something to do with this?If the car is locked and i open the door the head light flash and horn go off and when i put the key in the ignition and turn the key it disables,so i know it works.Somebody help me pleeeeeeease i am going crazy!!!:cry: :cry: :cry:

Sounds like you need to disable your alarm. If Im reading it right, you try starting the car with the alarm blarring?

 

[Nick M]

You need to get a meter out and check against the EWD for what is missing.

The ignition switch powers both sides of the starter relay. Your theft deterent provides a ground path for the relay. You can check for B+ on the big wire on the starter, and check the small wire for B+ when your budy cranks the key. Then you will know if you have a starter problem, or a system problem.

 

[jetjock]

The ignition switch supplys +12 to the TDS through the cig lighter circuit to silence the alarm once it's been triggered. It does not reset it, so the starter disable remains active. You'll need to cycle either key cylinder unlock switch to get a reset. As for the NSW (as Nick pointed out) it's a simple circuit. Lastly, the fuel pump doesn't run until the engine is cranked. A little RTFM would be helpful here.

 

[Grenadian7mgte]

the alarm is disabled when i try to start the car,and there is no power going to the remote wire on the starter when cranked.Like i said,if i jump the starter the car starts thats how i have been starting the car.I have two friends that have supra's and both of them show fuel pressure up when ignition is in the on position.

 

[jetjock]

I see. My mistake in trying to be of help. Had I known that in addition to car problems you have a reading comprehension one I wouldn't have bothered. Nor do I understand why you're asking for assistance if you and your two friends are so knowledgeable about how the car works. Perhaps you should ask them rather than dealing with those who really understand it. Listed...with pleasure.

 

[Grenadian7mgte]

I see. My mistake in trying to be of help. Had I known that in addition to car problems you have a reading comprehension one I wouldn't have bothered. Nor do I understand why you're asking for assistance if you and your two friends are so knowledgeable about how the car works. Perhaps you should ask them rather than dealing with those who really understand it. Listed...with pleasure.

My fault man,i didnt mean to come off in the wrong way.I am thankful for your response.I had this supra for about 5 years now and i have been starting it with a toggle switch to the starter remote wire.This problem is drivin me crazy,i just finish rebuilding the engine and trying to get rid of old problems,all i was saying is when my friend turns his key to the on position i see the fuel pressure go up to about 35psi on his fprg and i get nothing on mine.No hard feeling man we are all supra bothers.

 

[Nick M]

I can only comment on the Toyota system, not any hacked up system with aftermarket noise makers.

If there isn't power to on the small wire when cranking, test output of the starter relay. You could always just swap out the relay with a known good unit to see if the relay has failed, or the circuit. With an aftermarket system, I am guessing it is the aftermarket system.

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?Section=Main&Page=038

This schematic is for an 89, and it is very similar to your 88. The wires could be different colors, but it shows you what you need to start.

 

[jetjock]

Ok, fair nuff. Like Nick I also can't offer anything on a car that's been hacked but if all you have is the factory alarm try unlocking the door with the key. That will reset the alarm. Grounding pin 3 (violet with a yellow stripe) on the theft computer will also reset the alarm, same as unlocking the door with the key. You can also do as Nick suggest or try grounding pin 13. It'll be the light blue with an orange stripe wire. Refer to the link Nick posted. I'm 99% sure these wires will be the same colors on your car.

Your buddy's car must be hacked. The fuel pump on either a turbo or N/A MKIII will not run until the engine is cranked. Again, refer to the online EWD for how it works. If you want the pump to run with the key on jumper B+ and FP in the diagnostic connector near the fuse block.

Nick: Lol...love the avatar.

 

[Grenadian7mgte]

o.k guys i am giong to take your advise and swap out that starter relay and disable the theft.I am going to do it this weekend,At lunch today i checked the codes on my car and a code came up for no starter signal.I think i have a serious wire problem guys because i took my meter and checked the relay and i cant even get continnuity between any of the wires from the relay to the starter?I looked at the diagram Nick M sent and everything seems straight forward there,is there something else the wires from the relay could run to?

 

[Nick M]

You could certainly have a broken wire(s).

Just make sure you are on the correct wires when testing continuity. A better way is to check voltage at the source, and its component. Then you know if the wire is broke, or just has high resistance. The EWD locates the relays, the pins in the relay, the power source and ground sourc, you can't go wrong.

The STA signal lets the ECU know you are attempting to start the car, and the RPM will be low.

 

[Grenadian7mgte]

O.K guyz thanks alot for all the advice,i had to run my own starter relay because i definatly have a short in my wire harness.I can finally star the car with the key,i still get a hard start though.I got to check my cold start injector and make shore the ecu is getting the starter signal.Question? can i run the fuel pump to a positive source that come on when i turn the key in the on position?does the pump get exactly 12v or is is less?

 

[Nick M]

12v for cranking. You can test the pump by jumping the fuel pump pin in the diagnostic connector.

 

[Grenadian7mgte]

12v for cranking. You can test the pump by jumping the fuel pump pin in the diagnostic connector.

I checked the pump and i could hear it hum and my pressure went up,i have an aftermarket fpr with gauge and its at 40psi at idle,what is the best psi of fuel for stock?thanks for all the help nick M.