MTFS - Multi Function Temp Sensor Testing

[michael]

Note:

On Jul 21, 2008, at 2:00 PM, 200q20v-request at audifans.com wrote:

> From: QuikQtr at aol.com [mailto:QuikQtr at aol.com]
> Sent: Sunday, July 20, 2008 12:44 PM
> To: benswann at verizon.net
> Subject: Re: MTFS - Multi Function Temp Sensor Testing
>
>
> ECT (MTFS) Terminals:
>
> #1 : Brown w/Black = goes to Engine Temp Gauge: If you Short this  
> Terminal to Ground
> with the Key On the Temp Gauge should Move to Full Hot
>
> #2 : Blue w/Yellow = goes to the A/C Control Head and Shuts off the  
> A/C Compressor when
> under an Over Heat Condition or if the ECT Fails
>
> #3 : Black w/Blue = Terminal 15 (Ign. On Power) = No longer  
> Required with newer
> 3-Terminal ECTs
unless your instrument cluster is malfunctioning due to ground  
problems.  In this case, if you use the newer 3-terminal, your temp  
gauge will not work.
>
> #4 : White w/Black = Connected in Parallel with the Coolant Level  
> sensor to Trigger the
> Idiot Light (Auto Check System) when under an Over Heat Condition  
> or if the ECT Fails
>
> Later, Randy