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Old 01-01-2014, 09:12 PM   #1
Ilwakeboarder87
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2004 VUE 2.2L
Default Temp gauge not moving, replaced ECTS, no change...

Hey guys,

First off thanks for some of the tips on here. Been lurking while doing repairs on my Vue and greatly appreciate some of your write ups and knowledge.

I just picked the car up about a month ago and had a couple problems with it. I replaced the hubs, pads, rotors, drums, shoes, stabilizer linkage, tie rod ends, air, oil, gas filter, plugs, ECTS, low speed fan resistor, and a couple other odds and ends.

I have one issue though I'm not figuring out. Pretty mechanically inclined as I can replace engines and transmissions but electrical... Just sucks.

My temperature gauge is staying at 1/4 even when starting the car in -5 temperature. I had to replace the low speed fan sensor as it was completely toast and actually the wire broken. Replaced the ECTS thinking the sensor was bad, no change on the gauge. All other gauges work just fine. Any ideas or places that are common point of failure for the temp gauge? Or could the gauge cluster be toast due to a short in that low speed fan sensor?

2004 2.2L 5 speed

Last edited by Ilwakeboarder87; 01-01-2014 at 09:21 PM..

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Old 01-02-2014, 10:29 AM   #2
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2007 VUE 3.5L
Default Re: Temp gauge not moving, replaced ECTS, no change...

Quote:
Originally Posted by Ilwakeboarder87 View Post
Hey guys,

First off thanks for some of the tips on here. Been lurking while doing repairs on my Vue and greatly appreciate some of your write ups and knowledge.

I just picked the car up about a month ago and had a couple problems with it. I replaced the hubs, pads, rotors, drums, shoes, stabilizer linkage, tie rod ends, air, oil, gas filter, plugs, ECTS, low speed fan resistor, and a couple other odds and ends.

I have one issue though I'm not figuring out. Pretty mechanically inclined as I can replace engines and transmissions but electrical... Just sucks.

My temperature gauge is staying at 1/4 even when starting the car in -5 temperature. I had to replace the low speed fan sensor as it was completely toast and actually the wire broken. Replaced the ECTS thinking the sensor was bad, no change on the gauge. All other gauges work just fine. Any ideas or places that are common point of failure for the temp gauge? Or could the gauge cluster be toast due to a short in that low speed fan sensor?

2004 2.2L 5 speed
Is gauge stuck at 1/4 even with ignition off? If yes - consider replacing the IPC (instrument panel cluster).

Here are a few other things to consider:

All gauge information is provided to IPC on same data-bus.

Here's extract explaining how ECTS information is provided to IPC:

The engine control module (ECM) sends coolant temperature as determined by the coolant temperature sensor to the body control module (BCM) via the controller area network (CAN) serial data. The instrument panel cluster (IPC) displays the engine coolant temperature with the gage when the BCM sends a class 2 message to the IPC indicating coolant temperature percentage. The engine coolant temperature (ECT) gage defaults to cold (0) or below if:

The ECM detects a malfunction in the ECT sensor circuit.

The IPC detects a loss of class 2 communications with the BCM.

The BCM detects a loss of CAN communications with the ECM.


A ECTS failure should activate malfunction indicator light (MIL) - which is also known as service engine soon (SES), or check engine light (CEL) and set diagnostic code P0117.

Many code readers will read live data - plug one into OBD port and check for ECT data (provided in degrees).

See attached thumbnail for ECT sensor interconnect with ECM (near center of diagram).
Attached Images
File Type: jpg 2.2 ECT Wiring.jpg (103.7 KB, 5 views)

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Old 01-03-2014, 02:00 PM   #3
Ilwakeboarder87
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Default Re: Temp gauge not moving, replaced ECTS, no change...

Would your guess be the IPC? You are correct it is at 1/4 even when the ignitions is off.

Btw: thanks for all your help. I see your posts all over with diagrams and such. You're a huge help on this forum.

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Old 01-03-2014, 02:51 PM   #4
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Default Re: Temp gauge not moving, replaced ECTS, no change...

Quote:
Originally Posted by Ilwakeboarder87 View Post
Would your guess be the IPC? You are correct it is at 1/4 even when the ignitions is off.

Btw: thanks for all your help. I see your posts all over with diagrams and such. You're a huge help on this forum.
I'm thinking its time to go shopping for new IPC (several on eBay and don't overlook local salvage yards).

They are ridiculously easy to swap-out. See post # 5 of this thread for hints:

http://www.saturnfans.com/forums/sho...d.php?t=142173

And, there's few technical obstacles - vehicle mileage is stored in BCM so any IPC you plug in will update after key on.

Thanks for the kind words and I think you'll find most members really try to help.

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Old 01-03-2014, 03:04 PM   #5
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Default Re: Temp gauge not moving, replaced ECTS, no change...

Is there any possibility that the bcm is bad and causing it? Or would there be other symptoms showing up?

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Old 01-03-2014, 09:31 PM   #6
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Default Re: Temp gauge not moving, replaced ECTS, no change...

Quote:
Originally Posted by Ilwakeboarder87 View Post
Is there any possibility that the bcm is bad and causing it? Or would there be other symptoms showing up?
Possibilities are unlimited when dealing with automobiles (or planes, tv's, cellphones, etc).

What I try to do is round up possible suspects and pick the one looking most guilty.

You're obviously shopping for more opinions and hopefully others will chime in.

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Old 01-03-2014, 10:41 PM   #7
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Default Re: Temp gauge not moving, replaced ECTS, no change...

the coolant tepm sensor is a 2 wire jump the 2 wires together useing some speaker or other wire and key up the gage should default to full hot if not wireing issue between the connecter and ecm.. if partial id be looking at ipc gage

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Old 01-03-2014, 10:45 PM   #8
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2005 VUE 2.2L
Default Re: Temp gauge not moving, replaced ECTS, no change...

Quote:
Originally Posted by Ilwakeboarder87 View Post
I replaced the hubs, pads, rotors, drums, shoes, stabilizer linkage, tie rod ends, air, oil, gas filter, plugs, ECTS, low speed fan resistor, and a couple other odds and ends.
2004 2.2L 5 speed
Add THERMOSTAT to your to do list.

I had the same issue. They get tired/ aren't the best from the factory.

...
'05 ,2.2L, FWD,5-speed stick with transaxle death rattle is history,,,
'17 Suby Forester

245216 mi. VUe is off to the dealer auction
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Old 01-03-2014, 10:46 PM   #9
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2005 VUE 2.2L
Default Re: Temp gauge not moving, replaced ECTS, no change...

Quote:
Originally Posted by Ilwakeboarder87 View Post
Is there any possibility that the bcm is bad and causing it? Or would there be other symptoms showing up?
Over-thinking it... Engine temperature is regulated( mechanically) by the....

Jeeez, I missed the part about the gauge frozen at 1/4.... HOw many miles on your VUe, Wake? HOw's the coolant look? FLush it?

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