[s-cars] Re: Coolant temperature sensor fault causing low boost

[Brett Dikeman]

At 10:02 PM -0400 7/10/04, TM wrote:

>Now following the radiator replacement, I've found that I still
>have a low boost problem after the engine is hot- pulled codes
>and found coolant temperature sensor, intermittent fault.
>
>Doing the Bentley diagnostic, it seems like the multifunction temp
>sensor is fine, this doesn't really make sense.

It's referring to a different sensor- back of the block, towards the 
passenger side, is the ECU's coolant temp sensor.  It's used 
primarily(I think) for timing and initial starting- not sure on 
either of those, SJM's site probably covers exact functionality.  If 
it fails, the ECU assumes worst case scenario- maximum measurable 
temperature.

On the NA 20v cars, the connector contacts get pulled out, so that 
might be worth a check, as might a spritz of contact cleaner.

Oh, also, occasionally someone finds the plugs mixed up since there 
are multiple 2-pin connectors there.  The intermittent code probably 
means the right plug is in the sensor, but if you're feeling extra 
paranoid, check the wire colors against the diagrams.

Brett
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