Help identifing a sensor. CTS?
#1
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Heh guys
As some of you may know I am in the process of ripping out my injector harness and making a new one. Along the way I found a broke wire bundled in the injector harness going to what I thought was my Coolant Temperature Sensor, RH side of engine, that goes back to the ECU, but I am confused. There is two. The one with the broke wire is the only one connected. The one with the Bosch style plug has never been plugged in. The Bosch style sensor is the only one mentioned in the Jaguar EFI manual I have.
Can somebody please help me identify which one is which, and in particular the one on the left?
Cheers
Only the Bosch plug can be seen in this photo, but just to show you perspective:
![](https://scontent-syd2-1.xx.fbcdn.net/v/t35.0-12/15215759_932528716877766_766183313_o.jpg?oh=b14ef7dc5782510796e7fd34873754e2&oe=58370DE1)
The sensor in question is on the left:
As some of you may know I am in the process of ripping out my injector harness and making a new one. Along the way I found a broke wire bundled in the injector harness going to what I thought was my Coolant Temperature Sensor, RH side of engine, that goes back to the ECU, but I am confused. There is two. The one with the broke wire is the only one connected. The one with the Bosch style plug has never been plugged in. The Bosch style sensor is the only one mentioned in the Jaguar EFI manual I have.
Can somebody please help me identify which one is which, and in particular the one on the left?
Cheers
Only the Bosch plug can be seen in this photo, but just to show you perspective:
![](https://scontent-syd2-1.xx.fbcdn.net/v/t35.0-12/15215759_932528716877766_766183313_o.jpg?oh=b14ef7dc5782510796e7fd34873754e2&oe=58370DE1)
The sensor in question is on the left:
![](https://scontent-syd2-1.xx.fbcdn.net/v/t35.0-12/15184067_932509570213014_1729782922_o.jpg?oh=0eff44da5d2e5ccd8b1bde27f2be99fb&oe=5836E5C7)
Last edited by paulyling; 11-23-2016 at 12:44 AM.
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#5
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As said above, the single wire with the push-on connector, to the rearmost of the two, is the dashboard temp gauge sender.
The Bosch-type thing I suspect has been added, I have not seen a Lucas car with anything in that position before. It could be the thermotime switch (ie the temperature triggered switch that turns off the 15 enrichment minute timer - or 45 sec timer in US cars - if the water is warm enough) but this is usually on the A bank rear water manifold, as shown in the pic.
By the way, the bolts that hold down the injector loom to the valley floor must be replaced and sealed even if you, as recommended, attach the new one to the rail. As you mentioned, they go through to the oil space.
Greg
The Bosch-type thing I suspect has been added, I have not seen a Lucas car with anything in that position before. It could be the thermotime switch (ie the temperature triggered switch that turns off the 15 enrichment minute timer - or 45 sec timer in US cars - if the water is warm enough) but this is usually on the A bank rear water manifold, as shown in the pic.
By the way, the bolts that hold down the injector loom to the valley floor must be replaced and sealed even if you, as recommended, attach the new one to the rail. As you mentioned, they go through to the oil space.
Greg
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#6
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My right hand bank, as per the previous photo, has the bosch plug AND this little one wire deal.
So I am wondering.....if my LH bank has the CTS, which is plugged in. The RH bank has my sender for the Dash Gauge, which is connected which leaves my Bosch style plug disconnected. What is this one for then?
Mine has been unplugged since I got the beast and was doing fine for about 2 years. Only know I have been having trouble with her almost cutting out at idle speed when warm.
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Last edited by paulyling; 11-23-2016 at 02:44 AM.
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#7
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So I am wondering.....if my LH bank has the CTS, which is plugged in. The RH bank has my sender for the Dash Gauge, which is connected which leaves my Bosch style plug disconnected. What is this one for then?
Mine has been unplugged since I got the beast and was doing fine for about 2 years. Only know I have been having trouble with her almost cutting out at idle speed when warm.
Mine has been unplugged since I got the beast and was doing fine for about 2 years. Only know I have been having trouble with her almost cutting out at idle speed when warm.
As I mentioned, Paul, I think this extra thing may have been added post factory, and no longer has a use. Someone may even have replaced a water manifold with one from from another V12 model. It has nothing to do with the car cutting out at idle when warm, that is for sure. Once all the work you are doing on the injection is done, post the idle symptoms (if they are still there) and I have no doubt the WoOZ will sort it!
Greg
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As I mentioned, Paul, I think this extra thing may have been added post factory, and no longer has a use. Someone may even have replaced a water manifold with one from from another V12 model. It has nothing to do with the car cutting out at idle when warm, that is for sure. Once all the work you are doing on the injection is done, post the idle symptoms (if they are still there) and I have no doubt the WoOZ will sort it!
Greg
Greg
Thanks Greg. Yep I have a post on the old idle issue right here:
https://www.jaguarforums.com/forum/x...eriods-168508/
Obviously the troubleshooting is on pause for a while whilst I am making my new harness up but keen to get back into this soon.
Next time I turn her on she would of had a new Injector Harness, New Spark plugs and and ECU upgrade to a 16CU. So fingers crossed she starts first go AND the idle issue has been remedied!
#10
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Looks like a Thermotime switch to me...which was used on early HE V12s which had the old style cold start system with two separate cold start injectors. I think Jaguar ditched the system circa 1983
Jaguar USED THERMO TIME SWITCH.
This same basic switch was used on a wide variety of cars although I suspect the operating specs varied by exact application
Cheers
DD
Jaguar USED THERMO TIME SWITCH.
This same basic switch was used on a wide variety of cars although I suspect the operating specs varied by exact application
Cheers
DD
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