Wiring diagram needed?

Hi,

By chance, is there a specific circuit you are working with? For example, do you need schematics for the powertrain control module or the instrument cluster?

Let me know.

Take care,

Joe

Hi,

No problem whatsoever. If you look below, I attached the schematic for the powertrain management. That includes the engine and emissions system sensors.

Since you mentioned emissions, I also attached the vacuum schematic for the emissions system. It is the last pic below.

Note: The wiring schematic was two pages long. I had to cut each pic in half to make them readable for you. I did overlap them so you can follow from one to the next.

Let me know if this helps.

Take care,

Joe

See pics below.

Hi,

The schematic is the same for both. However, your truck with a manual transmission should have a clutch switch that allows the starter to engage. It won't have a neutral safety switch. Also, on the schematic, note there are different connectors identified.

If you look below, I took a section of the starter circuit schematic. You can see that the same power supply goes to either a clutch switch or a neutral safety switch.

Let me know what problem you are dealing with. I may have schematics that will help more. Also, let me know if this is a base model, Limited, or SR5. If I recall, the base model didn't offer a 3.4L, but let me know. I doubt it, but something could be different.

Take care,

Joe

See pics below. Note: Pic 2 shows the options I'm seeing.

Hi,

That code is specific to the intake air temperature sensor. That can cause it not to run. See the description below. (Pic 1)

Do me a favor. Disconnect the MAF sensor and see if it stays running. The IAT is integral to the MAF.

Let me know.

Joe

Does it stall as soon as you release the key from the start position, or does it take a few seconds for it to happen?

Let me know.

Joe

Hi,

Then it doesn't sound like an ignition switch issue. Are you certain the fuel pressure is within specification? Also, let me know if you have a live data scan tool. If you do, let me know if you lose the RPM signal right before it turns off.

Let me know.

Joe

Hi,

If you smell gas when it shuts down, it sounds like you may be losing spark at the plugs. However, you mentioned the PCM is shutting down the fuel pump. Is that correct?

Let's try a little test. This still may be a faulty ignition switch. Both the injectors and coils get power from the ignition switch.

Go to the coil and probe it for power. See if power is lost when the engine stalls.

Next, have you checked the circuit open relay for the fuel pump?

Let me know,

joe

See pics below.

Hi,

Thanks for the update. I need to know which schematic you are looking at. LOL, I tried going through the ones I sent, but need to know which one you are referencing. I noted that on the last pic you sent +B E1 shows battery voltage at all times. You don't have that based on what you are saying. Let me know exactly where you are checking.

Let me know.

Joe