CTS -Coolant Temperature Sensor ....Where is it exactly?

[ocean]

Does an 89 Renix Comanche have one? Its supposed to be on the drivers side of the block right?

 

Thanks

[SuperWade2]

Does an 89 Renix Comanche have one? Its supposed to be on the drivers side of the block right?

 

Thanks

 

This one?

 

[azscott]

Which one....there are two. One is pictured above and is used by the gauge...the other one is used by the ECU and it is the on the drivers side block just around the motor mount I believe...just above the knock sensor...

[BJA814]

FARTS! there's two??

 

That's why my gauge never worked after the full cluster swap. Threw in the ECU one. I never even thought about it...just threw in an aftermarket one.

 

What exactly does the ECU one do???

[Geonovast]

Actually, if there's an auxilary fan, there's 3.

 

The one on the back of the head controls the gauge/light. Different senders for the gauge than the light.

 

The one on the bottom of the block is for the ECU. The computer needs to know how hot the motor is so it can go from cold-running mode to warm-running mode. The Renix systems have preset values for timing and air/fuel mixture in cold running mode, then listens to the sensors when it's warmed up.

 

If you have an electric auxiliary fan, there's a third sensor in the driver's side of the radiator. At least the 4.0s do, not sure about the 2.5.

[BJA814]

Ahhh that makes sense. So an aftermarket sensor should go in the back of the head correct?

[ocean]

Thanks for the information.... I looked underneath then looked for wires but I will check again closer to motor mount DS..... Yeah I'm looking for the ECU type

[Geonovast]

Don't get confused between the CTS and Knock sensor. The CTS will have a pigtail with a plug for the harness to plug into. IIRC it has two round prongs on the plug. The knock sensor doesn't have wires coming off of it, and the plug for it looks like an injector plug. I believe the CTS is in front.