MAP sensor wiring.... (bruce?)

[TType85]

I'm hooking in a MAP sensor for a specific chip and turbolink boost sensing. I can't find my t-link harness to easily 'plug & play' this and really don't want to buy another if what i'm thinking will work.

The cars have a connector for the MAP under the hood for the stock boost gauge (analog dash cars) So we have, power/gnd/signal wires already there run in the car right by the ECM.

Can I just put the signal wire to pin C11 on the ecm harness (the MAT signal wire) and be done? I will have to disconnect the MAT of course.

Will this work?

 

[The Radius Kid]

I *think * the T-Link harness has some embedded electronic components in it.

 

[KendallF]

Originally posted by TType85
I'm hooking in a MAP sensor for a specific chip and turbolink boost sensing. I can't find my t-link harness to easily 'plug & play' this and really don't want to buy another if what i'm thinking will work.

The cars have a connector for the MAP under the hood for the stock boost gauge (analog dash cars) So we have, power/gnd/signal wires already there run in the car right by the ECM.

Can I just put the signal wire to pin C11 on the ecm harness (the MAT signal wire) and be done? I will have to disconnect the MAT of course.

Will this work?

Yes, this will work.

The T'link harness for ALDL data has a signal converter; Chris is referring to the "plug and play" harness that powered the MAP from (I believe) the TPS. Nothing to do w/the ALDL data stream.

 

[TType85]

Cool, much cleaner under the hood.

 

[turbofish38]

Digital dash cars also have this harness. It just doesnt have a MAP sensor plugged into it. Located on the right fender.

Eric Fisher

 

[bruce]

Originally posted by TType85
I'm hooking in a MAP sensor for a specific chip and turbolink boost sensing. I can't find my t-link harness to easily 'plug & play' this and really don't want to buy another if what i'm thinking will work.

Will this work?

The MAP sensor as used in oem form gets it's 5 volts from the dash, not the ecm. So you might wind up with some error due to the different voltages.

For the effort to make it elegant, it's alot of work.
You need to back probe the white connector by the ecm to track down the wiring.
HTH

 

[TType85]

Re: Re: MAP sensor wiring.... (bruce?)

Originally posted by bruce
The MAP sensor as used in oem form gets it's 5 volts from the dash, not the ecm. So you might wind up with some error due to the different voltages.

For the effort to make it elegant, it's alot of work.
You need to back probe the white connector by the ecm to track down the wiring.
HTH

Does it matter where the 5v to power it comes from? I know at the ECM the MAT/TPS/CTS share the same ground, but what about power?

 

[bruce]

Re: Re: Re: MAP sensor wiring.... (bruce?)

Originally posted by TType85
Does it matter where the 5v to power it comes from? I know at the ECM the MAT/TPS/CTS share the same ground, but what about power?

To me it does.
I don't want signals drifting.
The ecm has enough power on it's 5v regulator to power the MAP, so IMO it's worth the work.

 

[kenmosher]

Originally posted by turbofish38
Digital dash cars also have this harness. It just doesnt have a MAP sensor plugged into it. Located on the right fender.

Eric Fisher

Yep, except it isn't connected to the dash wiring, so the 5v is dead on it ... *DOH*

That's why the boost harness pulls from the TPS (which comes from the XDRP ECM 5.01 volt reference.)

 

[TType85]

Can I pull the 5v for the map off the TPS 5v Ref then? Pin C14 on the ecm.

 

[kenmosher]

Yep.