Code 32

[supraguy31]

Yes, I know this is a AFM code and Ive done some research on it.

My Question is that Ive changed both the AFM and the AFM Housing and If the car is sitting Idle, Its fine but as soon as I rev the engine past 3000 RPMs, The check engine light comes on and throws a Code 32.

Any Ideas on what I can check Next

Thanks
Robert

 

[jetjock]

You have an NA motor right? A lack if VS will cause the symptom you describe. Think bad wiring.

 

[supraguy31]

Nope, Its a Turbo Motor. Im going to check the Wiring to make sure but the wiring Harness as a Hole looks pretty good.

Robert

 

[jetjock]

Nope, Its a Turbo Motor. Im going to check the Wiring to make sure but the wiring Harness as a Hole looks pretty good.

Robert

Then your research was off. It's not an AFM code.

 

[supraguy31]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&Page=27

Seems to be one to me.... Maybe Im using the Wrong Manual

 

[jetjock]

See the little 3 notation? Look at the next page. The fact it refers to VS is another tip off. Your engine doesn't have a VS signal because it has a Karman Vortex AFM. Try here for a better example:

http://tinyurl.com/2p447u

The HAC sensor biases the THA (air temp) signal from the AFM. It normally will not cause the engine to quit above 3000 when it goes bad. That said it does use the common 5 volt reference the AFM and your other sensors do and an underpowered AFM will cause the symptom you describe. I'd be checking the 5 volts on the AFM connector, especially if you have an older model year with the external HAC sensor. If you find it low unplug the HAC and see if the problem goes away. You'll still have the code but the engine should run above 3000 rpm. Or just unplug it (if you have the external one) and see what happens.

 

[supraguy31]

PM Sent back to ya.

 

[supraguy31]

Thanks Jet. I guess some TSRMs are a little more Percise that others. The one I have (88 Supra TSRM) list the Code 32 as a AFM problem, The manual that you email to me List a Code 32 as a AFM for Non turbos and a HAC sensor for Turbo Motors. As soon as I seen that, I knew Exactly what it was. My 88 Supra turbo didnt have a HAC sensor installed so I went out this morning, Pulled the Wiring Harness through the Glove Box so I can get to the Spliceoff wiring for the HAC, Soldered the Wiring in and Plugged in the HAC, Cleared all codes from the ECU memory and started up the car. Code gone, Last coed is a 52 Knock Sensor. Going to pull both of them Test and if needed install new ones as I have them already

Thanks again

Robert

 

[jetjock]

Thanks for the PM Robert. Glad it all worked out. Fwiw knock a code is usually the result of open wiring/bad grounding. Search this site for rewiring info, especially from member Shaeff, and be advised the knock code is not simply advisory in nature. The engine's performance will be impacted as long as you have it.