 Pinout values for 74 1.8 ECU |
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| L-Jet914 |
 Oct 21 2021, 09:56 PM
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Member  Group: Members Posts: 237 Joined: 24-October 12 From: Davis, CA Member No.: 15,080 Region Association: Northern California  |
I recently bought a used 74 1.8 ECU for a backup part if needed. I was wondering if anyone has any pinout values so I can test the ECU to see if it is good. Thank you in advance.
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| timothy_nd28 |
Oct 25 2021, 10:56 AM
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest 
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Not sure what you are asking here. Are you asking for resistance values for each ECU pin, or are you using a curve tracer? Either method wouldn't tell you much about the integrity of the ECU.
The fastest way would be a go/no go test by just throwing it into the car and trying it out to see if it works. To bench test, you would need to bring power and grounds to certain pins. Also find a way to simulate high ignition voltage for the ECU to read, along with a dummy load for the fuel injectors while observing timing of each pulse with a 4 channel O scope. Not to mention providing certain resistances for the AFM and CHT sensor, it would be problematic to bench test the ECU. Pretty sure they have a wheel barrel type test machine that would do this all for you, but again, much easier to throw the spare ECU in the car to see if it works. |
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Posts in this topic
L-Jet914 Pinout values for 74 1.8 ECU Oct 21 2021, 09:56 PM
L-Jet914 bump Oct 24 2021, 04:15 PM lesorubcheek This is from the workshop manual. Pretty sure the... Oct 25 2021, 11:22 AM StarBear Been looking for someone with test equipment for a... Oct 25 2021, 02:51 PM JeffBowlsby I have the EFI Associates testers for both MPC and... Oct 25 2021, 03:10 PM
L-Jet914 So I guess quickest way to test the ECU I purchase... Oct 25 2021, 08:47 PM |
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