(Solved) 3rz starts and dies, no CEL

That violet wire only goes to the ECM.
The ECM grounds that wire when there is a malfunction.

 

BTW, if the light comes on when you ground that Violet wire, the connector you circled above is making good connection.
Otherwise, the CEL light wound not come on.

 

Okay im just looking over the diagram trying to rule out all possibilities cause this truck is driving me crazy everyone keeps telling me to part it out but its just in to good of shape for me to do that i want to fix it up a bit and daily drive it.

 

Below is the data for the ECM, but you need to check it by back probing. (Wires and connectors plugged into the ECM)

 

I will check this out in the morning and update in the evening when i get the chance.

 

Look at the power.
Also be nice to see if the 16 pin connector - Pin #1 SENSOR VREF has 5v.
Something is missing, somewhere.

 

I will check all of this out i am highly determined to fix this truck at this point because every one else says it’s a lost cause and that just motivates me even more.

 

On the 16 pin connector pin # 15 is only getting 1.5 volts only thing i see wrong voltage wise

 

That’s why you are able to connect to the truck with the scan tool.

I’ll look at diagrams when I get home. Need to see where it gets power from.

 

That wire comes directly from the ECM.
You did check it while it was plugged in, by back probing it correct?

The arrow below is the the DLC and ECM connect by that wire.
(C) 15 is the 16 pin connector.

 

Agreed
GL
Keep everyone posted

 

Yes i checked it while plugged in and with a hot battery in the truck

 

Where is the data link connecter at or is that part of the ecm? i will be checking over things again in the am before work. Not sure if it has anything to do with it but the air bag light is on for some reason not sure if that has anything to do with it or not

 

I am going to tag @Dm93, mostly because I have no idea what TE1 is?
The DLC is under the hood.

 

Okay i was thinking before when i was inspecting wires awhile back i was looking at the cover on that diag port in the engine bay and seen te1

 

If you didn’t have 12v on pin 15 of the ECM, you won’t have it at the DLC.
It could be shorted to ground. But DM93 is in here now. He might have an idea.

 

Just to make sure, you say the scanner doesn’t connect to the truck, and you have NO engine light that ever shows up? Not even when you turn the key to On, with engine off?

 

I'm not exactly sure what your going after here but DLC 1 (D1) (Toyota specific) connector is under the hood and DLC 3 (D7) (OBD) connector is under the dash.

 

No check engine light “ever”. No communication with scan tool.
Checked all ECM voltages and grounds. All good except TE1.

 

Correct no cel at all unless i apply ground to the violet wire i only done that to confirm the bulb was good. Ive tried 5 different scan tools multiple times all of them say the same thing each time can not communicate.