Throwing Codes: 24, 32, and 41

[freemoneey]

i need a little bit of help because after getting the codes from the ecu i get 24, 32, and 41 on my 87 7mgte mt

after doing some research i found that the code 24 is for Intake Air Temp sensor signal and the causes are:
-Intake air temp. sensor circuit
-Intake air temp. sensor
-ECU
BUT the funny part is that i dont have the AFM at all because i am running a HKS VPC. so thats the part i dont understand why i am getting this code.

the second code is 32 is for HAC Sensor signal on the 87-88 7mgte and for the 7mge is air flow meter signal. the causes are
-HAC sensor circuit
-HAC sensor
-ECU
does this mean that the HAC sensor is bad?

and the third code is 41 throttle position sensor signal,
for this one i think i caused by my self, maybe when i removed the throttle position sensor when i took the alternator out and tried to take the tps and the isc sensor to replace the hoses with new ones. Could having moved the tps be causing the code 41?

but theweird part is that according to the tsrm that i have, it says the procedures to clear the ecu codes, i did what the tsrm tells me and i still get the code all over again.
After clearing the codes do i have to drive the code?

 

[black91turbo]

i need a little bit of help because after getting the codes from the ecu i get 24, 32, and 41 on my 87 7mgte mt

after doing some research i found that the code 24 is for Intake Air Temp sensor signal and the causes are:
-Intake air temp. sensor circuit
-Intake air temp. sensor
-ECU
BUT the funny part is that i dont have the AFM at all because i am running a HKS VPC. so thats the part i dont understand why i am getting this code.

the second code is 32 is for HAC Sensor signal on the 87-88 7mgte and for the 7mge is air flow meter signal. the causes are
-HAC sensor circuit
-HAC sensor
-ECU
does this mean that the HAC sensor is bad?

and the third code is 41 throttle position sensor signal,
for this one i think i caused by my self, maybe when i removed the throttle position sensor when i took the alternator out and tried to take the tps and the isc sensor to replace the hoses with new ones. Could having moved the tps be causing the code 41?

but theweird part is that according to the tsrm that i have, it says the procedures to clear the ecu codes, i did what the tsrm tells me and i still get the code all over again.
After clearing the codes do i have to drive the code?

You are getting code 24 because you are not running an AFM....plain and simple. There is a way to get rid of it but there is a procedure for it if you have a piggyback. Not sure about the others though so I will let someone with more knowledge chime in. Good luck!

 

[CRE]

To correct the THA error code (when running without the stock AFM or a THA sensor) you only need to add a 2.2K resistor to the harness across E2 and THA.

http://www.fadingworld.com/Supra/El...ro/MAFTwriteup/7M-XXX/MAFT Pro and Codes.html

I'm not familiar with the VPC. If it makes corrections for air pressure you probably want to remove the HAC sensor anyway. In that case the link above covers it too.

As for the TPS, if it's not properly calibrated you'll usually only see a code 51. Check the wiring for breaks and shorts. Make sure you're getting a smooth change in the signal as you move the throttle plate. You should have about 4.8v at the VC wire of the TPS connector and you should see from about .5v to just a bit under 3.5v at the ECU's VTA pin as you move the throttle plate.

Testing info and calibration proceedure:
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=101

 

[freemoneey]

i was reading about the HKS VPC and its supposed to have the resistors so that this sort of thing dont happen. i will check it out.

the thing about the tps is that i am not getting code 51 but instead i am getting 41, i will tried what u recomended to see maybe if the tps its bad. i do have another spare parts and another tps to put in if my tps is bad.

yes the VPC, does measure the air and temp better than the stock afm could ever have and better than the upgraded Lexus afm, but i am not able to removed tha hac because the VPC does not change any of its signal it only changes the signals from the afm system

To correct the THA error code (when running without the stock AFM or a THA sensor) you only need to add a 2.2K resistor to the harness across E2 and THA.

http://www.fadingworld.com/Supra/Electrical/MAFT Pro/MAFTwriteup/7M-XXX/MAFT Pro and Codes.html

I'm not familiar with the VPC. If it makes corrections for air pressure you probably want to remove the HAC sensor anyway. In that case the link above covers it too.

As for the TPS, if it's not properly calibrated you'll usually only see a code 51. Check the wiring for breaks and shorts. Make sure you're getting a smooth change in the signal as you move the throttle plate. You should have about 4.8v at the VC wire of the TPS connector and you should see from about .5v to just a bit under 3.5v at the ECU's VTA pin as you move the throttle plate.

Testing info and calibration proceedure:
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=101

 

[freemoneey]

this codes i wasnt getting before i decided to park for a while while i gather the parts for the 5 speed swap since my car was auto. and after i was finished with the swap, i started getting the codes when before it i wasnt getting the codes.
i know that doesnt make sense but the Check engine light is driving nuts everytime i drive my supra, and yes i am picky with stuff like beacuse i want to know why its there and solve the issue for knowledge sake.

You are getting code 24 because you are not running an AFM....plain and simple. There is a way to get rid of it but there is a procedure for it if you have a piggyback. Not sure about the others though so I will let someone with more knowledge chime in. Good luck!

 

[CRE]

I would think that given that the VPC lets you run S/D you could ditch the HAC...

Well, if you weren't getting error codes before then it's probably time to start inspecting the wiring and connectors. I'd start with making sure the VPC is in proper working order and that it hasn't been damaged somehow.

 

[freemoneey]

thats what i was afraid of, i tought that i might have to look at the wiring for the VPC and the vpc harness

I would think that given that the VPC lets you run S/D you could ditch the HAC...

Well, if you weren't getting error codes before then it's probably time to start inspecting the wiring and connectors. I'd start with making sure the VPC is in proper working order and that it hasn't been damaged somehow.

 

[92nsx]

There are basically two posting styles:

1. Bottom Posting - replying below quoted text.
2. Top posting - replying above the original/quoted message.

Methods #1 is acceptable here at Supramania. #2 is not.

Do not top post!

Please, Please put quote on the top, it makes it alot easer for us to read.

 

[freemoneey]

I would think that given that the VPC lets you run S/D you could ditch the HAC...

Well, if you weren't getting error codes before then it's probably time to start inspecting the wiring and connectors. I'd start with making sure the VPC is in proper working order and that it hasn't been damaged somehow.

i did what u suggested and u were right. it was the damn connectors for the KHS VPC and FCD, some were a little loose and they were the HAC and THA pin for the ecu, which meant that i was getting erratic readings from these two wires and since i dont have the AFM. so the ecu was telling me that something was wrong. i fixed the connections and these codes dindt pop up again, 24 and 32.

for the code 41 which is for tps (throttle position sensor, i think) the plug was getting loose and the little metal c clip that holds the plug was lost and i put a new one in there and this code is gone.

Now does someone know hoe to fix the back lights sensor, the one that tells u when something is wrong at the taillights.
because the bulbs are good and the plug to this sensor is damn loose.
Or can i just bypass this sensor.