Coolant temperature control sensor location

Welcome to 2CarPros.

This vehicle has a cylinder head temperature sensor (CHT) which signals the computer. The bad news is you have to remove the intake manifold to access it. It is located under it. Picture 1 shows its location.

Here are the directions for removing the lower intake manifold. Sensor replacement will follow. All attached pictures correlate with these directions.

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See Picture 2

See Picture 3

Removal

NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces that enters the oil passages, coolant passages or the oil pan, may cause engine failure.

1. Remove the fuel rail.

2. Drain the cooling system.

3. Remove the 3 thermostat housing-to-lower intake manifold bolts.

4. Remove the 10 bolts and the lower intake manifold.
- Remove and discard the intake manifold and thermostat housing gaskets.

- Clean and inspect all sealing surfaces.

Installation

1. NOTICE: If the engine is repaired or replaced because of upper engine failure, typically including valve or piston damage, check the intake manifold for metal debris. If metal debris is found, install a new intake manifold. Failure to follow these instructions can result in engine damage.

Using new intake manifold and thermostat housing gaskets, install the lower intake manifold and the 10 bolts.

- Tighten in the sequence shown to 10 Nm (89 lb-in).

See Picture 4

2. Install the 3 thermostat housing-to-lower intake manifold bolts.
- Tighten to 10 Nm (89 lb-in).

3. Install the fuel rail.

4. Fill and bleed the cooling system.

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Sensor Replacement

Cylinder Head Temperature (CHT) Sensor

Picture 5

Picture 6

1. Remove the lower intake manifold.

2. Disconnect the Cylinder Head Temperature (CHT) sensor electrical connector.

3. Remove and discard the CHT sensor.
- To install, tighten to 10 Nm (89 lb-in).

4. To install, reverse the removal procedure.
- Do not reuse the CHT sensor, install a new sensor.

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Let me know if this helps or if you have other questions.

Take care,
Joe

Hello,

I have included the instructions for the removal and installation of your vehicle's Cylinder Head Temperature sensor (CHT). It is located under your engine's intake manifold. Please go through the guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

Welcome back:

If there is another one, it will either be mounted on the side of the radiator, the thermostat housing at engine front, or the side of the engine block, but I don't recall there being one.

I attached a wiring schematic of the cooling fan circuit. I circled the CHT and pointed to where the signal goes. First it is sent to the PCM and then power goes to the cooling fans. I had to cut the pic in half, but I did overlap them so you can follow it.

Let me know if this helps.

Joe

Welcome back:

I added those pictures to show that the cooling fans receive their signal from the sensor you replaced. Tell me, have you checked the basics such as fuses, relays, and the fan motors themselves?

Let me know. I want to help you through this.

Joe

Welcome back:

You have me confused on the wiring you replaced. When you say it was backwards, are you sure the power supply is still the same? Tell me this, if you pull the relay, does the fan still run? If so, you most likely are supplying power straight to the fans and bypassing the relay or there is a short to power. I wish I was there to help. It's much more difficult not having the vehicle in front of me.

Let me know.

Joe

Welcome back:

No confusion at all. Since the fans did stop when you removed the relay, there isn't a short after the relay. Did you ever replace the relay or check it?

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Let me know.

Joe