Water temp sensors - what are the symptoms if failed?

[Paul_JJ]

Tex is a legend! He knows what he is on about -) Will test it asap. I think the TPS is gone, therefore I have problems, however don't know how wiring can be affected, I wish I had a spare TPS around just to swap them for 5 min and see if it makes any difference.

So if I don't have 5V then my TPS is faulty did I get that right?

 

[Paul_JJ]

@ Paul_JJ: you will appreciate that i'm running stock HTLs so they don't come too fancy like most after-market ones..
thanks for starting this thread btw, getting some very interesting tips. good read, esp from Texx

Yeah good thread, I wish it didn't cost that much fixing the car, it's also good to know what is wrong with it first, before spending any money. Spacecraft you will be surprised how much the original leads cost -) More then the TRD ones and double the price of most of the aftermarket ones.

 

[Texx]

So if I don't have 5V then my TPS is faulty did I get that right?

If you don't have 5v between the VCC and E2 terminals of the ECU with the ignition ON, you've got an internal ECU fault or there's a problem with that ECU connector.

 

[Paul_JJ]

Tex I passed this test -) 4.93-5.12V the first one, and 0.14 Ohm the second test.

It pulled like a train today for like 20 min, and then on the way back home done it again..... -)

 

[Texx]

Pull off the connector at the TPS, it will have 4 pins. Set your meter to 20v DC, switch the ignition on and connect one probe to the bottom pin and the other to the top pin (it doesn't matter which probe goes where). You should see a voltage reading of 5v or near as damn it (the meter may read -5v if the probes are reversed).

If the reading is less than 4v we may have a wiring/connection issue somewhere in either the E2 or VCC circuit.

Ok done that!



I saw 0V only

Measure the voltage between the VCC +5v and E2 terminals of the ECU with the ignition ON, you should have 5v.

Tex I passed this test -) 4.93-5.12V the first one, and 0.14 Ohm the second test.

OK, something isn't right here. Basically you've carried out the same voltage check but at the TPS connector you saw 0v and at the ECU connector you saw 5v. You need to check the voltage again at the TPS connector top and bottom pins (connector removed and ignition ON).

 

[Paul_JJ]

Replaced the TPS today - Tim at TB Developments did a great job at a bargain price for me! And he had to adjust the actual cable and there is a cable which goes to the gearbox - it was too tight and this resulted to the TB not to be able to open 100%. But either way a new sensor is now on, and Tim said the old one is in very good condition as well, but I'm not 100% sure if it's fully operational.

Thank you for your help Tex, I appreciate that.
The car is wheelspining now when under heavy acceleration, due to snow tyres on it and cold road surface.
Also now I can make 0-70mph pretty quick not exceeding 3K RPM and you won't even feel a single gear change, just like staying in the 1st gear all the way up -)

 

[dark_knight]

glad you got sorted Paul_JJ -- you are like the only V owner i know who drives an autobox.. so hope you know you are pretty special..

 

[Tim@TBDevelopments]

no worries buddy pleasure to do business with you again. Hopefully won't be the last

Tim