B200K Temperature Sensor Wiring
 

Shortly before taking my car off the road before its MoT expiring in late November I noticed that my temperature gauge had dropped to 'cold' and the red coolant warning light was on. The car showed no signs of overheating and no loss of coolant, cold hoses or cold air through the vents. I thought this would be the coolant temperature sensor below no. 2 cylinder on the intake manifold side, so I ordered one up. Only when I went to fit it today did I discover that a) I've ordered the wrong one as the one on my car is a spade connector, and b) the wiring itself was actually disconnected and the end of the plug was broken, likely due to the heat exposure and 33 year old plastic. It seemed a bit of a 'stretch' to the coolant temp sensor but it wouldn't plug back in anyway due to it being broken. Do I stand a chance of getting one of these to replace it? And if so, where would it plug in at the other end? A Scottish winter day today meant I didn't spend too long under the bonnet to investigate. Thanks in advance.

Have you got a photo? I can't picture what you're saying properly.

I'll try and get one today, it's rather buried under the inlet manifold but will see what I can do!

Been trying to upload the pic last night but to no success, I may try another way but a pic is coming!

I think he's looking for the wiring colour code for the temp guage sensor Luke, sounds like the sensor he ordered was the ECU sensor for EFi models and not the guage one.

Ah I see, sounds like I have the wrong sensor then.

If anyone wants an EFI sensor then let me know!

What's the make and part number of the sensor you've got? Also which car/year/fueling is it?

I'll check the invoice for the part number etc, the pin is definitely different to the one on my car. My car is a 1988 360 GLE with the B200K, and it's the incorrect part. As I say, the wiring on my car is knackered it seems, so the sensor may be fine. Sensor I bought has a blue electrical connector at the end.

Thanks,

Joseph

That's the carb engine then? Is there only one terminal on the sensor you bought? Can you put a photo of the strange blue connector up?

What you say is correct but given the ECU temp sensor is 2500 +/-12% at 20C, 0.04 Ohms difference in the wires to/from it won't make a significant amount of difference. Even at 80C it's in the order of 290-364 Ohms so again, 0.04 Ohms won't make any real difference.

Simple fact is the supplied sensor was for the engine management ECUs, it should have been for the instrument in the dash which uses a different sensor.

Also the broken wiring to the gauge sensor would give exactly the symptoms the OP described.

2002 S60 Coolant temperature sensor connector
 

Hi..old thread but I wondered if anybody can suggest how to get a genuine coolant temperature sensor connector (the plug that plugs into the top of the sensor) for a 2002 S60? For some reason Volvo are being totally useless and won't get back to me about it and I can't find what I can be sure is definitely the correct one from any parts sites.

Any help would be much appreciated!

J

Have a look on the existing plug and see if you can find a number in this sort of format "93BB17K624CA".

If so, try a Ford dealer using the number you find on the plug. It won't be that number above, that's the screenwash pump for my Jag but also fits certain Volvo models (2002 S80 is one i believe) and many other Ford models. Volvo were owned by Ford when your was made so there's a good chance of Ford bits being included.

Also have a look at the listing for the screenwash pump, is the plug similar to that on your CTS plug? If so, it's a Bosch style plug, some have "keys" on the side so that different plugs can't fit the component in error. A good autoelectrician will also be able to help.

https://www.ebay.co.uk/itm/252268529673

That's the listing, you'll see the connector on top of the pump, if your CTS is similar you're in with a fighting chance using the methods above. :thumbs_up: