I’m in desperate need of some help!
I was just given a 2000 S-Type 4.0 by my uncle and unfortunately it has no spark at all, here is everything I have checked so far. Battery is good and has a voltage of 12.8v, anti-theft is working as it should, I have checked for water ingress and didn’t find any issues, and I’ve check the wiring going to and from the PCM to the coil packs and all is good but still nothing. I tested the voltage at the coil packs and I have 12v on one pin of the connector but when I have someone crank it whilst I check the other pin which is ground, nothing. From what I’ve gathered the PCM is supposed to pull that pin to ground and it’s not doing it. Do I need to look into a new PCM? I feel like I’m going crazy lol! Any help or recommendations would be amazing!

 

Since the available voltage appears to be good, check the earth/ground points on the chassis and body for corrosion or loose connections.

You are correct that the ECM/PCM completes the circuit to earth/ground to open and close the fuel injectors.

 

I think my next point of attack is the CKP sensor since I have heard it can cause a no spark issue. While I am under the car getting the sensor replaced I will do what you stated. At this point if the CKP sensor does not solve it or doing what you stated does not solve it or at least get me somewhere then I’m going to be assuming the PCM is bad.

I’m not sure if this hints at any clues but the little screen under the speedometer does not appear to be working and has not worked in awhile. Note the car has not been on the road or been tagged since 2013.

 

Yes, the CKP could also cause the condition. Check to see if there is the correct fuel pressure whilst cranking the engine. There should be around 3 bar fuel pressure.

 

I will definitely check the fuel pressure I never thought about it, but could the car not having enough fuel pressure cause a no spark issue?

 

No, the CKP tells the ECM/PCM that the crankshaft is rotating to keep the fuel pump running. If the CKP is faulty, there is likely no fuel pressure.

 

If the vehicle hasn't run in several years, most likely the fuel pump is seized.

 

Oh ok I gotcha! I’m going to go outside here soon and check all the grounds and check for corrosion like you said and see if I find anything. Probably won’t be outside to long today, here in Kentucky it’s about 90f outside lol

 

I have a new fuel pump coming for it from Jaguar, but I have done the spark test, taking the coil out and putting the spark plug back in it and using a jumper lead to ground it but no spark on all 8 cylinders

something is keeping the PCM from pulling the coils to ground and I cannot figure out for the life of me why.

 

You certainly can't test the signal to the coil with a voltmeter. You need an oscilloscope. The ground signal is only switched for milliseconds.

 

Attached is the X200 Electrical Guide.

Here is a link to the X200 Workshop Manual:

https://www.dropbox.com/scl/fi/dq8qz...=ovoc7h83&dl=0

 

No

 

And how would that cause a no spark condition?

 

It doesn't. It's a way to determine if the fuel pump is operating and if the CKP is functioning.

What is your suggestion to help the OP?

 

I mean even if I tested the ground without a oscilloscope, the multimeter should still show that pin being pulled to ground, correct?

 

Use the electrical guide to trace the earth/ground points. Also check the connecting plugs for the ECM/PCM to determine if there is any corrosion or poor connections.

 

I will do that. I did fail to mention I did remove the PCM yesterday to check for water ingress because I have heard that is a problem on these cars. Fortunately I didn’t see anything wrong with the PCM no corrosion, rust or water ingress.

This Is my first Jaguar I have ever owned and I’m really hoping I can get it running again.

 

I suggest you check your powertrain control relay and fuses #18 40A and #4 5A as they control power to the ECU.

 

I will do that and I will keep updating as progress, if any is made.

 

I just finished checking those fuses and that relay and both are ok, I’m stuck and don’t know what to do from here.