OK. I am going to double check the wiring on the CPS, I know I did swap that sensor about 2 weeks ago or so. Also while I am out there I will be hooking up the noid light to test if the injector plugs are firing. How can i verify that my injectors themselves are firing. Maybe they are stuck or clogged? Who knows. Will be back with the results in an hour or so. THX.
Car will not start?
- Thread starter kssweeper28
- Start date
johnathan1 said:
OK What do you know my CPS wiring was mixed up. The red and blue wires on the harness side just had to be switched. Well Now the cranking sounds much much better. So solved that problem. Now it is a consistent crank rather than all chopped up and retarded.
Now I have swapped many sensor on this harness, so if I mixed up those two wires on the most important sensor on the car. Lets see if I have the AFM and Coil Pack Sensor right.
Coil Pack Sensor - Plug is green on harness side and grey coming off the coil pack itself, not sure if that makes a difference but here it goes.
Blue with Red Stripe - / - Black
Blue with Yellow Stripe - / - White
Black with Oarnge Stripe - / - Beige
Yellow - / - Green
AFM Sensor - There are two brown wires on the sensor, maybe I have them mixed them up. Not really required on startup but I swapped them back and forth, did not hear a difference in cranking.
Now to top it all off. I went and got a void light earlier, And plugged it in to my injector plug on the harness, cranked the car and "OH BE DAMN" the light did not light up on injectors 4 5 and 6 but maybe I am blind, lol.
To top it all off, after the car is cranked, sort of smells like fuel. So I just had to pull the plug and see if it was wet, it was damp but far from wet. Definately smelled like gasoline. But could be vapors maybe? Maybe the injectors arent firing? And while the plug was out, I hooked it up to the wire, no arc or spark. But then again I may be blind.
Now this one is funny! Code 12
12 RPM Signal
Diagnosis
No "NE" or "G" signal to ECU within 2 seconds after engine has been cranked.
Trouble Area
Distributor, or CPS, circuit
Distributor or CPS
Starter signal circuit
ECU
I havent got that until I fixed the plug wiring. Where to go now.
hmmm...no code 12 before? What year is your Supra? I know that the wiring pinout I gave you works perfectly on my 87...maybe they are different for other years?
I'll go take a look at my Coil pack plug and report back.
I'll go take a look at my Coil pack plug and report back.
I believe pre-89's had the green plugs didn't they? Maybe you should put your CPS wires back where they were, if you weren't getting a code 12 before.
I took a look at my coil packs plug, and my wires are SOoOO old and discolored, it is hard to tell what color they are, but this was the best I could do:
Coil side -/- Harness
Green -/- Yellow
Black -/- blue w/ red stripe
White? -/- Black w/ Red stripe
White? -/- blue w/ red stripe?
sorry i couldn't help more.
I took a look at my coil packs plug, and my wires are SOoOO old and discolored, it is hard to tell what color they are, but this was the best I could do:
Coil side -/- Harness
Green -/- Yellow
Black -/- blue w/ red stripe
White? -/- Black w/ Red stripe
White? -/- blue w/ red stripe?
sorry i couldn't help more.
OK well lets see hear, I am going to go ahead and switch those two wires back around, if it gets rid of code 12 and the cranking sounds the same. I am going to do a beep test, cause I hooked up a noid light earlier to the injector plugs and it sure as hell didnt blink or flash. But I do have 12.6V to the plugs. So I am going after the resistor pack or the ECU. Anything else someone might add to help would be great. I am sure I am on the right track though. Will reply here shortly.
Alright I swtiched those two wires around and cranked it. Did not hear a difference and I got rid of Code 12. But I have great news guys!
OK So now I am heading on to another problem I have found, I have two wires that are on the wiring harness that plugs into the ECU that arent getting the greatest connection. They keep popping out. Really just wont stay in. And I am almost 100% sure this is what my car wont start. IG SW is one of them which is the ignition switch. And the other is E02 which is the power ground. I am getting poewr to my gauge cluster so should I worry more about IG SW. I mean Im going to fix them both and go from there. What do you guys say. Problem solved or no? Will go fix that and get back to you all! THX.....
Alright I swtiched those two wires around and cranked it. Did not hear a difference and I got rid of Code 12. But I have great news guys!
OK So now I am heading on to another problem I have found, I have two wires that are on the wiring harness that plugs into the ECU that arent getting the greatest connection. They keep popping out. Really just wont stay in. And I am almost 100% sure this is what my car wont start. IG SW is one of them which is the ignition switch. And the other is E02 which is the power ground. I am getting poewr to my gauge cluster so should I worry more about IG SW. I mean Im going to fix them both and go from there. What do you guys say. Problem solved or no? Will go fix that and get back to you all! THX.....
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i'm @ a loss....WHY haven't you used a timing light?
you might want to fix ALL loose connections....
you might want to fix ALL loose connections....
drjonez said:
No need in using the timing light right now. Car will never start with the poor connections that go to the ECU IG SW and E02. Not in a millin years. So I am off to my buddys house to pickup those two plugs just so I can use two wires. I tried bending them,etc to make them lock, and all but no luck. Definately later on down the road I will get a new engine harness. I could save the trip about 2 hours one way but I dont think I can get the plugs here anytime soon. Well THX for all the help, will update when I get the wiring issue fixed.
what's the problem? the pins are pushing back? just push them all the way forward on the connector and then put a drop of super on them to hold them in place....
OH YEA BTW. Could that be Y my noid light was not flashing. Because the IG-SW or the E02 connector wasnt getting the greatest connection? But the plugs themselves have 12V. Who knows.
Matter a fact, I can guarantee the car will start unless infact the timing or some other issue pops up. Who wants to bet on some Paypal. HAHA I am just happy I figured out the problem. Well not 100% sure its the problem but my ECU isnt even turning on. Cause when I turn the key to the ON position the MIL doesnt even come on, meaning my ecu is not turned on. Took 2 days to figure out the problem. THX TO EVERYONE! Just have to wait and see what happens when i get these two wires.
Is it the pins in the connector that aren't clicking into the connector? if that's the case, you can just get new pins at an electronics store...right?
johnathan1 said:
Well what kind of electric store? Any suggestions.
I called toyota and they said most of the ecu pins for toyota cars are generic and mostly the same so I am going to take these two pins up there and see if they can help me. If not to an electronics store I go.
Well, there is a little mom & pop electronics store about a block away from me...that's where I get all of my electronics stuff...
You should be able to get them from the dealer too though...then just crimp the new pins onto the wires...make sure you get more pins than you need.
You should be able to get them from the dealer too though...then just crimp the new pins onto the wires...make sure you get more pins than you need.
Alright guys I have an update. I have those two pins plugged in now, E02 and IGSW. My cars MIL light still does not come on when I turn the key to the "ON" position meaning my ECU is not being turned on, correct?
The other thing I can guess is I am missing two more wires. You guys know how there are 4 plugs on the 87 yellow plugs ECU's. 3 plugs sit flush with the ECU if you know what I mean. Then there is a black that comes out of it 2-3" that is a 5 pin connector. I have that plugged in although the harness side for that plug only has 3 pins on it. Maybe that is a ground for the ECU or something that gives the ECU power. Who can help me on this one..... THX in advance.....
The other thing I can guess is I am missing two more wires. You guys know how there are 4 plugs on the 87 yellow plugs ECU's. 3 plugs sit flush with the ECU if you know what I mean. Then there is a black that comes out of it 2-3" that is a 5 pin connector. I have that plugged in although the harness side for that plug only has 3 pins on it. Maybe that is a ground for the ECU or something that gives the ECU power. Who can help me on this one..... THX in advance.....
kssweeper28 said:
OK MY MIL/CEL appears now. I followed the flow chart in the TSRM FI-29. Figured that out. But hit the injectors with a noid light and still no injector pulse.....? No codes either. I am also no longer worrying about that forth plug anymore. So to conclude this statement and to go further on with this troubleshooting I will say I have 38 PSI in the rail. Almost positive the injectors are not firing and I have good number on compression. Timing is fantastic. The problem seems like it is coming down to the injector circuit.
Any input would be great! THANKYOU.....
1. 12V @ inj. w/key on.
2. gnd pulse from ECU
2a. no CPS signal @ ECU = no spark + no inj. pulse
2. gnd pulse from ECU
2a. no CPS signal @ ECU = no spark + no inj. pulse