2000 Jeep Cherokee XJ 2.5 TD VM engine

[layback40]

Originally Posted by BrokenJeep

Howdy,

Replaced injector with another second hand one. 96ohms.
No difference.
Checked fault codes with OBD2 Scanner after a drive. No codes.
So I started cleaning out all the plugs with contact spray after disconnecting battery and noticed this one has but marks on pins 1 and 7.
Part # on switch 52772A8.
Do you guys know what this plug is for?
Down by the pedals on my RH drive jeep.

Cheers
Tom

Where does the leads from the plug go? Probably 1 goes into a loom, other may go to something.

[BrokenJeep]

I believe the connector plug is called C107.
Located in a very tight place on the left hand side to my clutch. (RHD Vehicle)
It looks like it could go into the ECM but cannot be sure without tearing my dash apart to remove ECM to see.
If I'm not getting any fault codes, no check light and no power over 2000rpm. Could this potentially be an ECM failure?

[BrokenJeep]

Pins 1 and 7. Signs of heat

[layback40]

Originally Posted by BrokenJeep

I believe the connector plug is called C107.
Located in a very tight place on the left hand side to my clutch. (RHD Vehicle)
It looks like it could go into the ECM but cannot be sure without tearing my dash apart to remove ECM to see.
If I'm not getting any fault codes, no check light and no power over 2000rpm. Could this potentially be an ECM failure?

Where does the other 1/2 go? The thing that it plugs into.
Have a look at the diagram & follow the connecting wires going the other way. If you had an ECM failure, you probably could not start it.

[BrokenJeep]

Hi again
after months of not doing anything, Ive had another crack at it and hooked up a boost gauge to see whats going on and its making ZERO pressure. I have checked the boost gauge to ensure it is recording pressure ok and it is when hooked up to my dust gun.
exhaust is clear of obstruction
intake is clear of obstruction
no visible damage to turbo spins normally
scan tool showed no fault codes
does that sound like a wastegate issue to you guys?

really not looking forward to trying to remove the turbo to check the wastegate, tips and tricks for this procedure are highly appreciated.

many thanks
Tom

[layback40]

Originally Posted by BrokenJeep

Hi again
after months of not doing anything, Ive had another crack at it and hooked up a boost gauge to see whats going on and its making ZERO pressure. I have checked the boost gauge to ensure it is recording pressure ok and it is when hooked up to my dust gun.
exhaust is clear of obstruction
intake is clear of obstruction
no visible damage to turbo spins normally
scan tool showed no fault codes
does that sound like a wastegate issue to you guys?

really not looking forward to trying to remove the turbo to check the wastegate, tips and tricks for this procedure are highly appreciated.

many thanks
Tom

First thing I would do is to check the operation of the wastegate. There is a diaphragm operated by pressure from the outlet of the air side of the turbo. There is a rod going to an arm. If you apply about 20 psi to it, you should see it open the wastegate. You could also take the tube from the air cleaner to the turbo & see if it spins with the engine running. You can tie the wastegate closed or just remove the air hose from the diaphragm. There is a spring that keeps it shut until there is sufficient boost pressure to open it.
Its a PITA to remove the turbo. You need to remove the manifolds to do it. The exhaust from the turbo is also very difficult. 3 torx headed bolts & little room. Please let us know how you go.

[BrokenJeep]

Thanks for the quick reply.
Can confirm wg actuator is moving when 20psi is applied
Turbo does spin, i removed the small hose to diaphragm and blocked off the turbo side. Took it for a blat and got 3psi at 2000 RPM.
Gut feeling is that turbo and wg are OK.
Could this just be an effect of limp mode? Injector #1 is reading correct ohms.
I might also look into how to diagnose the MAF.