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wtf is a Q31 on a OBD1 ECU?

Old 04-03-2005, 12:27 AM
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Default wtf is a Q31 on a OBD1 ECU?

yeah i got this ECU, smelled a lot like burnt electrical....guess what? the item in Q31 on the board (1720/P06-A51) is melted... wtf is Q31 and its purpose in life? if important is there a replacement?

btw i tested the ECU on my HMT-ECU tester and it does blink (the LED sucks and i will probly go blind if i try to count them)...so its not a solid CEL...
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Old 04-03-2005, 12:30 PM
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Default Re: wtf is a Q31 on a OBD1 ECU?

Originally Posted by projekteg
q31's for the purge evap solenoid, someone mixed the plugs for iat sensor and purge evap solenoid at one time and fried it when the started the car. pgmfi owns you
q31 is a transistor for the purge evap solenoid, it's not important, and yeah, it's pretty common that they burn up. i've had a couple myself that were burn, and someone else made a thread a few weeks ago about one also. from what i understand, it's usually from someone switching the iat plug with teh purge evap solenoid plug and trying to start the car. either way, it runs fine without it and no cel.
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Old 04-03-2005, 12:31 PM
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Default Re: wtf is a Q31 on a OBD1 ECU?

so can i remove it? that mother ****** smells bad...i had to put it in the garage
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Old 04-03-2005, 02:22 PM
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Default Re: wtf is a Q31 on a OBD1 ECU?

i don't see why it would matter if you removed it, since it's trashed anyways. if you have any junk ecu's laying around, you can replace it with one from another ecu, i believe it's a d1780
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Old 04-06-2005, 12:11 AM
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Default Re: wtf is a Q31 on a OBD1 ECU?

Are you sure its for the evap? For some reason I had it stuck in my head that it was O2 heater related.

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Old 04-06-2005, 06:28 AM
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Default Re: wtf is a Q31 on a OBD1 ECU?

Originally Posted by leed
Are you sure its for the evap? For some reason I had it stuck in my head that it was O2 heater related.

q30 is 02
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Old 04-06-2005, 09:20 AM
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Default Re: wtf is a Q31 on a OBD1 ECU?

Originally Posted by projekteg
Originally Posted by projekteg
q31's for the purge evap solenoid, someone mixed the plugs for iat sensor and purge evap solenoid at one time and fried it when the started the car. pgmfi owns you
q31 is a transistor for the purge evap solenoid, it's not important, and yeah, it's pretty common that they burn up. i've had a couple myself that were burn, and someone else made a thread a few weeks ago about one also. from what i understand, it's usually from someone switching the iat plug with teh purge evap solenoid plug and trying to start the car. either way, it runs fine without it and no cel.
Bingo.
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