I would consider unplugging that inertia switch and bypass it altogether. Is it plausible that the inertia switch was triggered, and for some reason doesn't want to reset?

 

Your picture is too small for me to read. But it looks like I found this one at the right front component panel. I screwed up and switched the purple relay for the metal one and a small (I guess) resistor started smoking. The white label on one wire says "Jaguar cars P.I. relay by fuse Rists 8 N/A" and the other yellow label says "LMB3998AA issue 1 51247400A Lucas rists Elect. test 93 N/A. I'm not sure if it was a resistor or not, but I took a picture of the one next to it that has nothing plugged into it and it looks like it has the same thing attached to it. Hopefully, I can use that one to replaced the one that got smoked.

 

After looking at it again, it looks like it's connected to maybe a resistor then a diode, so it is being used. I will need another one.

 

Here is the parts that started smoking. What I can read on it is "W21 4R7".

 

93xjs6cyl,

You mentioned that "found this one at the right front component panel." Is this relay with the red base on it's own, or is it with other relays? I believe that a 93 EMS relay is mounted on the A-post (on the inner footwell panel) on its own. It's probably close to the ecu I might be wrong but that's what the documentation seems to imply. It doesn't show that it's part of the component panel in front of the knee bolster.

Paul

 

Yes, this one was right next to the ECM. It was alone, but as I said, the label by it says I.P. main relay. So, I never did find silver/ red stripe relay on a red connector. I looked throughout the car. I take it the part that smoked was an English resistor? Part # W21 4R7. I have a ton of resistors, so if someone can tell me what watt (maybe 2 watt) and what 4R7 stands for (may the resistance) then I can replace it right away.

 

Ok, I found the resistor. It's a 4.7 ohm 3 watt 5% resistor. I have a 4.7 ohm 2 watt that might last long enough to get my car running or until I get some. Which ever comes first. I have ordered the resistors.

 

There was only one relay that I could not locate, the one that say B/C post. It's supposed to be what appears to be right behind the drivers seat. Does anyone know exactly where that relay is?

 

That's the transmission control relay. It doesn't have any impact on the fuel pump running. Don't worry about it.

This is a simple diagnostic process. Test the terminals on the EMS relay to determine if current is being passed to the ecu. If that's fine, you then test the fuel pump relay to verify that it's being energised by the ecu output signal. That's how we'll start to verify why the fuel pump isn't running.

Paul

 

Which one is the EMS relay?

 

93xjs6cyl,

As mentioned above - "I believe that a 93 EMS relay is mounted on the A-post (on the inner footwell panel) on its own. It's probably close to the ecu I might be wrong but that's what the documentation seems to imply."

As you know the colour of all the wires, and can see from the wiring diagram that terminal 87 then provides the input signal to the ECU, you could follow back the appropriate wire from the ecu to verify .

I've also enlarged the diags above to assist in showing its location.

Cheers

Paul

 

The red connector next to the ECM is the I.P. main relay. I have located every relay except for the B/C post behind the drivers seat that says "convertible only".

 

Vee, Sorry, it took me so long to get back with you. I checked the inertia switch. I even opened it up, and I took a volt meter to check continuity. I placed the switch in both the on and off position (manually) and it check out fine.

 

There's only 2 relays in the equation to worry about as regards the fuel pump. Dont concern yourself with any of the other relays.

If you show a clear photo of how this red-base relay is mounted (the documentation says its on its own on the A-post) then we're home and dry. And have you done as suggested and confirmed that terminal 87 wire goes to the input port on the ecu?

Paul

 

The reason I said that I had found all the relays except the the one behind the driver's seat is because I never did find the red connector with a silver/red relay. My car doesn't have one. The red connector that was next to the ECM was for the I.P. main relay.

 

Hi 93xjs6cyl

Could this be the EMS Relay you are looking for?

This could be the one that Paul (ptjs) was telling you about (or maybe not)

There is a Fuse Box above the Knee Panel and it could be Fuse Number 7 (or maybe not)

Sorry about the 'Guesswork' but I don't have a Manual but I think this EMS Relay in the Foot well controls the Fuel Pump Relay under the Fender in the Boot-Trunk

Paul (ptjs) will know

 

93xjs6cyl,

"IP Main Relay"
"PI Relay"
"EMS Relay"
"Fuel Injection Main Relay"


I think they all relate to the same thing. I know I'm sounding like a stuck record but again:

- Is it mounted on its own on the A-post?
- Does the wire from terminal 87 go to the appropriate signal input terminal on the ecu as detailed on teh wiring diagram?
- Can you post a pic clearly showing its location?

Paul

 

Hi Paul (ptjs) + 93xjs6cyl

I've just come across a Thread from carsnplanes who seems to have had exactly the same problem

Although it seems he managed to find the 'Elusive EMS' Relay so maybe we've been looking in the wrong place? (or maybe not?)

As apparently on a USA Car its either in or under the Fuse Box Passenger Kick Knee Panel

EMS Relay Location on a USA CAR

What do you think Paul (ptjs)

 

Tks OB, No, that other poster has got an AJ16 car like yours which uses a different relay setup and additional fuses.

The 93 AJ6 setup is SUPPOSED to have the EMS relay on the inner A-post on its own.

Cheers

Paul

 

I have located every relay that was on the diagram you provided except the one behind the drivers seat. The only one with a metal relay was the fuel pump relay. That is probably the one you are looking for.