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I have a frustrating issue with my 99' 3.2 Sport which I am hoping some of you knowledge gents may be able to assist me with.
Just before xmas I was driving along, on a very cold day, and my otherwise bullet proof XJ8 cut out. I turned it over and it drove fine for about six miles when it stalled again. The car was recovered to my home and it has not started again since.
My initial suspicion determined the fuel pump was the cause but I have removed and tested it - it works fine. I have tested all the Relays and all appear to be functioning. On inspection of the fuses I found fuse 16 in the left-hand heelboard had blown and, in the Boot/ Trunk/ Luggage Compartment fuse box, fuse No' 3,4,5,6,7,8,11,15,17,19,21 are not receiving power - but the rest are.
If you are driving alonf and the engine dies. Then restarts after a few minutes. I would suspect that the fuel filter is becoming clogged stalling the car and then as debris settles allows restart, to just do it again.
No power to the fuses is probably a separate problem. I'll have to take a look at the diagram and see where it is fed from and what it powers.
Welcome to the Jaguar Forums. It's great to have you with us.
The first thing I would suggest is that you have the car scanned for any stored diagnostic trouble codes (DTCs), not only the generic Powertrain (P-prefix) codes, but also any proprietary Jaguar Body (B), Chassis (C) and Network (U) codes. Sudden stalling like you are experiencing may trigger codes that will help in the diagnosis. For the capability to read these proprietary Jaguar codes you will need to either visit a Jaguar dealer service department or an independent shop with a diagnostic system capable of reading the Jaguar-specific B, C and U codes. Please write down all codes exactly as they appear and post them here so we can help.
Vern's suspicion of the fuel filter is good.
I also suspect you have an electrical problem. Fuse #16 in the Left Hand Heelboard Fuse Box (LHHFB) provides ignition-switched power to several circuits as well as sections of the Right Hand Heelboard Fuse Box (RHHFB) and the Trunk Fuse Box (TFB). You will have to trace all these circuits to find the cause of the blown fuse, which is why any stored DTCs may be helpful in narrowing down the search.
Note that some of the fuses are ignition-switched and will not have power at their sockets unless the key is in Position II (ON or RUN). A quick glance at the schematics shows that fuses 3, 4 and 5 in the TFB among those, so turn the key on without starting the engine and check them again, and let us know which fuses now have no power, if any.
You can download the Electrical Guide for your car here:
In the meantime, please visit the New Member Area - Intro a MUST and post a required introduction so we can learn something about you and your Jaguar and give you a proper welcome.
Welcome to the Jaguar Forums. It's great to have you with us.
The first thing I would suggest is that you have the car scanned for any stored diagnostic trouble codes (DTCs), not only the generic Powertrain (P-prefix) codes, but also any proprietary Jaguar Body (B), Chassis (C) and Network (U) codes. Sudden stalling like you are experiencing may trigger codes that will help in the diagnosis. For the capability to read these proprietary Jaguar codes you will need to either visit a Jaguar dealer service department or an independent shop with a diagnostic system capable of reading the Jaguar-specific B, C and U codes. Please write down all codes exactly as they appear and post them here so we can help.
Vern's suspicion of the fuel filter is good.
I also suspect you have an electrical problem. Fuse #16 in the Left Hand Heelboard Fuse Box (LHHFB) provides ignition-switched power to several circuits as well as sections of the Right Hand Heelboard Fuse Box (RHHFB) and the Trunk Fuse Box (TFB). You will have to trace all these circuits to find the cause of the blown fuse, which is why any stored DTCs may be helpful in narrowing down the search.
Note that some of the fuses are ignition-switched and will not have power at their sockets unless the key is in Position II (ON or RUN). A quick glance at the schematics shows that fuses 3, 4 and 5 in the TFB among those, so turn the key on without starting the engine and check them again, and let us know which fuses now have no power, if any.
You can download the Electrical Guide for your car here:
In the meantime, please visit the New Member Area - Intro a MUST and post a required introduction so we can learn something about you and your Jaguar and give you a proper welcome.
Please keep us informed.
Cheers,
Don
Hi Don.
Thanks for your welcome and advice.
I did check the engine codes and received one error - P1230 - which led me to think the fuel pump was the cause of the problem.
I will check the fuses again in the morning as you suggest.
The king ( my term ) is the one in the pic as it powers all the fuses in the tray . Pic is for X300 but X308 is similar .
The fuse for the fuel pump control is # 16 / 10 amp LH Heelboard fuse box . Fuse # 16 is on page 32 of the wiring guide as it goes to point 27 circle double hash marks .
If the king relay clicks with your finger on it and no results , swap with another one with the same part # on the side
If the relay does not click we'll look at the ignition switch which controls the relay by providing it with a ground .
Last edited by Lady Penelope; 02-23-2018 at 07:13 PM.
I did check the engine codes and received one error - P1230 - which led me to think the fuel pump was the cause of the problem.
P1230 points to the fuel pump relay or its electrical circuit, not the pump itself. Here's the definition from the DTC Summaries, which you can download at the link below. It's important to refer to the Jaguar documentation since Jaguar's definitions and possible causes often differ from those on generic OBDII code lists.
The king relay is the Auxiliary Positive relay for the Trunk fuses and the Ignition Positive relay is the king relay for the LH Heelboard fuse box where fuse # 16 is ( but it was blown ) . My pic is way off
Might simply be to replace the fuse and see if it duplicates and blows again . Correct size ?
After that unplug :
Point 19 and 20 / Both L and R rear seat heater timers
18 / Clean the OBD 2 connector port
17 / Stability traction light and seat heater status light on the center console - not practical
16 / Transmission dual linear switch - not practical
15 / Sport mode switch light
14 / Gear selector illumination
13 / Interior rear view mirror
27 / Heated backlight relay
27 / # 1 Fuel pump relay
27 / # 2 fuel pump relay ( not installed on normally aspirated engine )
Easiest thing would be to swap the # 1 fuel pump relay
If you want to cut the problem in half you can cut the White / Slate wire after the CAS8 splice and before the CA20 connector as 14 - 17 are not critical ( ? )except for the 16 transmission duel linear switch
For a quick fix you can jumper the fuel pump relay power sockets with a heavy short wire and some blade connectors to not damage the relay sockets . This is a high current arcing hazard so disconnect the battery first and reconnect last . Gets you back on the road . The fuel pump relay power fuse is after the relay going to the connector so keep that in mine .
Last edited by Lady Penelope; 02-24-2018 at 08:09 PM.
02-23-2018, 03:55 PM
1999 3.2 Sport Electrical Problem
