locating the MFTS

Brett Dikeman brett at cloud9.net
Mon Aug 12 02:10:37 EDT 2002

At 12:43 AM -0400 8/12/02, Zoot531 at aol.com wrote:
>    I'm doing some AC diagnostics on my car and i was wondering where the
>Multifunction Temp Switch is located and what it looks like.  Apparently
>disconnecting it can aid in the troubleshooting process.

On the driver's side of the engine, there are some cast metal
channels external to the block that distribute coolant- the after run
sensor and MFTS both hang from this.

The after run sensor has two blade connectors; the MFTS has a large
booted 4-pin connector.

If the car makes full boost, don't bother- the same signal goes to
both the climate control head and the ECU, and if it is sending a
false overheat signal, you'll get about 1.2-1.3 bar displayed and no
more, unless you've modified the wastegate.

"They that give up essential liberty to obtain temporary
safety deserve neither liberty nor safety." - Ben Franklin

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