My start/stop battery died a long time ago with no issues other than start/stop doesn't work anymore.

 

Thanks for the detail, very helpful. I'd definitely like to be able to read codes, but it sounds like it's some specialized (read expensive) equipment. I'll try the brake switch and started route - see what I can dig up. If I come up empty there might just have to have the car flat-bedded to a local Jag specialist (much to my chagrin).

Thanks again for the help everyone!

 

Just a quick update: haven't done much due to work and it being too cold to fiddle with the car much. Current jack won't fit under the car so need to run to HF to get a low profile one, then I can start inspection of the starter.

In the interim, anyone have details on the relays in the various fuse boxes? I found the fuse layout online for the F-Type, but haven't found anything (including the service manual!?) that lays out which relay controls what. I want to check the starter relay, but not sure which one.

 

Haven't looked in years, but isn't there a diagram inside the lid you removed to take the picture?

 

Hah! Come now, that would make far too much sense for Jaguar to do something like that Nothing on the inside of the lid, on the top of the lid there is a picture of a book with an "i" in it, and a picture of a relay with a lightning bolt. I have a downloaded service manual for the 5.0 F-Types but for the life of me I could not find any images on the relays. I'll give it another go, it's a pretty big manual, maybe I missed it.

 

Here is one link... hope it helps:

https://fusecheck.com/jaguar/jaguar-...7-fuse-diagram

You have to scroll down to see all the fuseboxes, there are some annoying ads, but I think it's all there.

 

Thanks Valerie! I dug that one up already as well - it's not a complete list for all the fuses but it's something at least. The main thing omitted though are the relays - you can see them outlined in the diagram but not labeled. It doesn't make sense to me why this information is so difficult to track down, but c'est la vie. On the driver side front panel I see one called "Starter Motor Monitor", checked it (and the rest of the fuses in that box incidentally) and fuses look intact. Not sure what the "monitor" part means, if it's actually the fuse for the starter relay or something else. Huge learning curve for this car lol

 

I spent a lot of time yesterday searching a manual I think Oz put up on the forum a few years ago. I could find where the boxes where the fuses and relays were and could find electrical diagrams with the relays and fuses but nothing that correlated with location in a box. I think Valeries information is the best you will find. I think this info is in the glovebox manual too.

BTW the electrical diagrams are at the very end of the repair manual.

 

I don't recognize the buzz sound you recorded. Mine of course starts when I hit the button so wouldn't hear it if it were present. Assume the buzz sound corresponds to starter button push with brake pressed and is absent with start button push with brake not pressed? Kinda sounds like the starter motor running but the bendix not engaging the flywheel.

 

Hey lowpass, yup that's kind of what it sounded like to me as well. Haven't gotten under the car yet, jack won't fit, and haven't had time to go fetch a new low profile one (pre Christmas insanity). But I did toss my phone under there and I thought I could hear an occasional click and whirring like the motor might have been spinning for a sec but the plunger wasn't firing. I'll get another recording tomorrow, or maybe I can use the jack included with the car to lift it enough to get my bigger jack underneath.

Looks like these units are denso, from Jaguar they are a heart stopping $600-$700 new lol. Not sure why.

 

Thanks! I appreciate you looking, can't believe these aren't diagramming in the service manual. Will take a look at the schematics - might be able to infer from those.

 

Heart stopping indeed! As others have stated, we don't see a lot of starter failures on the forum even considering the start stop feature. Still it would be very useful to get under the car, put a hand on the starter and have "a friend" try to start the car and feel if the motor is running. That would eliminate a lot of potential (difficult to diagnose) causes if you can feel the hum of the motor. My wife really enjoys it when I invite her out to the garage for a little car work- especially for brake bleeding! If it turns out to be a starter ebay or bone yard might be a low risk cost effective solution. Or perhaps yours just has a stuck bendix which could be freed up?

 

Agree, the car has only 23k and starter failure doesn't seem like a common 'early issue' on these cars, but there's a first time for everything. I also may consider one of the rebuilt units for much less. Know if these starters typically need shimming? Some cars need it, some do not.

 

I'm going off memory, but shouldn't we be measuring the amperage at the starter? Under the load of starting, there should be a voltage drop at the battery, and I thought, in an earlier post, that there was little voltage drop. Just for fun I looked up starters on Rockauto, and they have nearly every variant for F-Types. That tells me the failure rate may be a bit higher than we think.
On a snobbier note, banging on your F-Type with a hammer? Uncivilized!

 

Lol - if there's one thing we all know, despite the classic beauty, the cars are completely uncivilized Plus they'll just be love taps.

Good point on the rebuilt starters, there's a supply, although might be from older/higher mileage 5.0 motors (i.e. used across various JLR products). In my view, there should be a significant voltage drop across the battery if there is load - i.e. the starter motor is siezed or if it's actually turning something. Free spinning it likely wouldn't cause too big of a load drop - also if this theory is correct, that whirring doesn't last long, maybe something in the car tells it to stop when it senses the motor is not turning over. All hypothesis - just waiting on a free day, might be the new year before I actually get to do anything as next week we are *supposed* to be taking a trip :/

 

Once you get under the vehicle @bfrank1972, use a test lamp, or voltmeter to determine voltage at the starter motor. If there is at least 12.6 volts available, see what the voltage is at the starter solenoid when the start button is pushed.

Do the key fobs work correctly?

 

Agree - it's just a matter of me getting under the car. Seriously considering springing for a quickjack, but wife is already not happy with me. Plan to see if the starter is getting juice, and see if the solenoid is getting triggered when the start button is pressed. Honestly, I'm praying it's the starter as I can tackle that. All this other stuff, electronics, immobilizers, etc. might be a bit over my head. Fobs seem to be working fine, if I leave it outside the car I get an explicit message saying it doesn't detect the fob. When I bring it in, the starter button does its heartbeat thing, message goes away, and when I press start (with brake pressed) the gauges cycle and everything looks as it should - except there's no glorious roar. New battery. Constantly hooked up to trickle charger. Big fuses all good.

 

BFrank: Was following this thread. Curious to know if you ever found the problem or a solution???

 

Hey Rondog, nope not yet, switched jobs so been busy and there's salt on the roads so I've deprioritized a bit. Just sitting in the garage sadly - spoke to a local mechanic who is a Jag specialist, might have him look at it at the end of the month if I can't get the time to get under the car. Based on his experience he didn't think it was the starter - said the starters don't really fail on these cars (but you never know). Was thinking it could be a computer module or brake pedal switch, but wild guesses at this point until he could run some diagnostics. Will keep everyone posted as it unfolds, can't wait until the roads clear and the car is running again. Just an absolute animal (in suit).

 

I am/was having this problem tonight. Took it out to dinner and went back after to start the car and had the same sound/no starting. Key is recognized inside and outside of vehicle, engine start/stop button would provide power to the interior and exterior lights. I finally went to the trusty Jaguar Remote app and tried the remote start feature and the car started up. Not sure how it was able to start with the remote app, but was able to get the car on and drive it home to get it back on the CTEK tender. I am thinking something either in the engine start/engine stop button isn't functioning or some other gremlin at this point. Any other thoughts??