Thread: Temp sensor ECU

The engine coolant temp sensor that talks to the ECU is located in the front of the thermostat housing

Don't dorget you might also want to check the fuel temp sensor - this also talks to the ECU - this is fitted in the rail on the RH side of the ram housing.

See attached

The multi plug type appears on DII (so called 4.0 L) - the DI has the two spade fitting.

I think the dealer was looking at the wrong model

Originally Posted by ladas

The multi plug type appears on DII (so called 4.0 L) - the DI has the two spade fitting.

I think the dealer was looking at the wrong model

cheers, thanks Ladas, so I was looking at the right one then, as shown in RAVE, item 6.
When he said 4.0-4.6 I repeated to him that it was a 1997 D1.
I'm not very confident I'll end up with the right part, can anybody advise the genuine number?

Unfortunately my ECP doesn't seem to cover the DI 's

Originally Posted by PLR

G`day
there`s 3 temp sensors/senders , coolant .

1 screws into the thermostat housing

1 screws horizonally into the inlet manifold on the drivers side front .

1 screws vertically into the inlet manifold on pass side at front beside the thermostat housing sorta .

The first 1 is a switch , it will operate the AC fans if the engine overheats .

The second is the 1 that tells the gauge where the needle should be .

The third is the 1 that talks to the ECU and this is the 1 to use your OHM gauge on , if it is open circuit like the other you`ve found a problem .

The first 1 will be open circuit because it only makes the circuit when the temp is higher than it should be .

If your not convinced remove the wire ( from the 1 , i`ve call the first 1 ) that is not the earth and earth it . The AC fans should turn . There should be no need to have ignition on , they switch earth and have power always .

If i`ve convinced you the part # i have is ....

To LA 081990 ... ETC 8496

From MA 081991 ... AMR 1425

Cheers

Peter

Peter - can't totally agree with you here, the sensor in the thermostat housing reads back to the ecu and it adjusts the fuel accordingly, as well as switching on the air con fans if the engine reaches a pre-determined high temp.

See attached.

Originally Posted by PLR

Yes i know what your saying .

But as it only operates when the coolant overheats it not likely to be the one he`s after and if it was malfunctioning it wouldn`t be open circuit .

If however the wire running back was earthing , yes a possible .

The Disco would probably be running ok untill it started to warm up .

Cheers

See what you are saying Peter, but my understanding is that it is a 'resistance' sensor giving various resistance and different temps, and the ECU enterprets the signal based on the resistance value.

..............of course i could be completely off track

I appreciate your input Peter but comparing your description to my RAVE cd, I think you're also looking at the later engine, which is called 4.0L or Mpi on the RAVE manual. I can't take any snapshots, my adobe here at home is only a reader.

I'm talking about a 3.9 hotwire, or MFI in the RAVE landrover workshop manual.

I've just ordered a parts CD from Dave's other site, so I'll just put this on the back burner a few days.

Thanks for your help fellas.

Originally Posted by PLR

Sorry for the confusion . I will get rid of it .

I had a look on my RAVE and it`s the same .

Says in the thermostat housing .

My EPC where i looked is for 3.9 and 3.5 Disco also 3.5 and 3.9 RR

RR up to JA have the ETC #### as do Disco up to LA and from MA all in the manifold .

It seems that with the sepentine belt on both RR and Disco so did the sensor position change .

Didn`t look at the RR GEMS or RR/D2Motortronics .

Again sorry for my confussion , i do feel bad about it ..

Cheers , Peter

I wouldn't feel bad mate, it keeps us all on our toes and our mind active, and if I felt bad every time I goofed - I would feel rotten most of the time