2015 F-Type R, no start, need advice
#41
Agree on the age, like a friend of mine said: "preventative maintenance" - if I can carve out some time this weekend I'll jack the car and take a look. See if the starter is getting voltage (and what voltage), listen to any noises it makes, make some noise myself tapping it with a hammer
QQ - don't think it's relevant, but if the little stop/start battery goes south, would that have an impact? Gut says no but not used to how complex these Jags are.
QQ - don't think it's relevant, but if the little stop/start battery goes south, would that have an impact? Gut says no but not used to how complex these Jags are.
#42
Brake switch is located at top of brake pedal lever on the left side according to the repair manual. There is a a brake pedal switch fuse somewhere too . There is also a brake pressure sensor in the abs module.
If you can get your hands on a Jaguar code scanner that will show if there is a DTC related to the brake switch or conflict with the switch and brake pressure in abs module.
Also looks like the starter motor has a special solenoid set up to support the start /stop function. So the suggestion to tap the starter mechanism is probably a good idea. In the old days the starter solenoid would also fail and you could test that by bypassing it with a stout connector between the solenoid terminal and the starter terminal. Don't know if it can be done with this setup though.
If you can get your hands on a Jaguar code scanner that will show if there is a DTC related to the brake switch or conflict with the switch and brake pressure in abs module.
Also looks like the starter motor has a special solenoid set up to support the start /stop function. So the suggestion to tap the starter mechanism is probably a good idea. In the old days the starter solenoid would also fail and you could test that by bypassing it with a stout connector between the solenoid terminal and the starter terminal. Don't know if it can be done with this setup though.
Thanks again for the help everyone!
#43
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.
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.
#45
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.
#46
Fuse panel diagram/ID
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.
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.
#47
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.
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.
#48
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.
BTW the electrical diagrams are at the very end of the repair manual.
Last edited by RGPV6S; 12-22-2021 at 01:08 PM.
#49
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.
#50
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.
Looks like these units are denso, from Jaguar they are a heart stopping $600-$700 new lol. Not sure why.
#51
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.
BTW the electrical diagrams are at the very end of the repair manual.
#52
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?
#53
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?
#54
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!
On a snobbier note, banging on your F-Type with a hammer? Uncivilized!
#55
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!
On a snobbier note, banging on your F-Type with a hammer? Uncivilized!
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 :/
#56
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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?
Do the key fobs work correctly?
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Carbuff2 (12-23-2021)
#57
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?
Do the key fobs work correctly?
#59
The following users liked this post:
Carbuff2 (01-20-2022)
#60
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??