Engine and ignition coil harness wiring please!

Welcome to 2CarPros.

I believe this is what you are looking for. If this is wrong, let me know.

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1. Ignition OFF for 1 minute, disconnect the harness connector at the ignition coil.
2. Test for less than 5 ohm between the ground circuit terminal B and ground.

If greater than the specified range, repair the ground circuit for an open/high resistance.

3. Test for less than 5 ohm between the low reference circuit terminal C and ground.

If greater than the specified range, test the circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

4. Test for less than 2 ohm between the ignition voltage circuit terminal A and the fuse.

If greater than the specified range, repair the ignition voltage circuit for high resistance.

5. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal A and ground.

If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

6. If all circuits test normal, test or replace the ignition coil assembly.

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Let me know if that helps.

Take care,
Joe

Welcome back:

First, I attached a picture of where all the wires go from that connector. Next, are any of these codes active?

DTC Descriptors
DTC P0351
- Ignition Coil 1 Control Circuit

DTC P0352
- Ignition Coil 2 Control Circuit

DTC P0353
- Ignition Coil 3 Control Circuit

DTC P0354
- Ignition Coil 4 Control Circuit

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Here are the directions for testing at the plug:

Note: Set the DMM to the DC Hertz scale for this test. DMM = Digital Multi Meter

5. Connect a DMM between the appropriate ignition control circuit listed below and ground.

* Ignition coil 1 control terminal D
* Ignition coil 2 control terminal E
* Ignition coil 3 control terminal F
* Ignition coil 4 control terminal G

6. Engine cranking, test for greater than 1.5 hertz between the appropriate ignition control circuit and ground.

If less than the specified range, test the ignition control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the ECM.

7. If all circuits test normal, test or replace the ignition coil.

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Let me know if that helps.

Take care,
Joe

Welcome back.

What specifically is going on with the vehicle? Also, I have no idea why the pics didn't attach. I'm going to try again. Let me know if you get them. I highlighted the wires between the ignition control module and the engine control module.

Take care,
Joe

Happy to help. Make sure to check the rubber boot that goes over the plug for arcing. Also, if there is any oil laying around the plug, see if removing it gets rid of the issue.

Let me know.

Joe

The readings look okay. What is the knocking?

Yes, that is correct. You want to use the ground provided. Interesting. Is the check engine light even coming on?

Welcome back:

The codes are related to the IP and air bag. There are multiple wires from the ECM and Ignition. Also, I can upload schematics, but there are a ton of them, so I need to narrow it down. Also, there are different schematics based on US and Mexico, so let me know what I can do to help.

Joe