Schematics for 1227165 (1227808 with additional IC U2)

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Schematics for 1227165 (1227808 with additional IC U2)

Postby bf6379 » Mon Oct 05, 2020 11:47 pm

1_processor.gif
Sheet 1 - Processor

2_inputs.gif
Sheet 2 - Inputs

3_outputs.gif
Sheet 3 - Outputs

4_ign_inj.gif
Sheet 4 - Ignition and Injectors

5_connectors.gif
Sheet 5 - Connectors

6_power_supply.gif
Sheet 6 - Power Supply

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Re: Schematics for 1227165 (1227808 with additional IC U2)

Postby antus » Tue Oct 06, 2020 11:53 pm

Thanks for that. I'll make it a sticky.

For anyone looking for simiar content for other ECMs around the same era there is also a mirror of the original source (Ludis' site) with schematics and other content which we have mirrored here https://pcmhacking.net/ludis/
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Schematics for 1227165 (1227808 with additional IC U2)

Postby pman92 » Wed Oct 07, 2020 6:08 am

Awesome. I know you've also got the memcal page mirrored here. What else is mirrored here, or is that it?
VR-VY Holden BCM Simulator: LINK
Ford Smartlock Bypass Module: LINK

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Re: Schematics for 1227165 (1227808 with additional IC U2)

Postby antus » Wed Oct 07, 2020 8:07 am

https://pcmhacking.net/memcals.html
Thats the only two. They both seemed like great information we couldnt afford to loose.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Schematics for 1227165 (1227808 with additional IC U2)

Postby Holden202T » Tue Dec 08, 2020 2:14 pm

:punk:

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Re: Schematics for 1227165 (1227808 with additional IC U2)

Postby charlay86 » Wed Jun 22, 2022 7:26 pm

For those of you who can't get simulated narrowband O2 signal from a wideband lambda controller to work with these (and later) ECMs:
If you look at the inputs schematic and take note of the O2 sensor amplifier, you will note that it has two inputs pins.
O2HI - obvious, the narrowband signal comes in here.
O2LO - perhaps less obvious, it needs to connect directly to the signal ground PIN on the wideband controller.
Ideally you would splice the wideband controller signal ground wire (goes to engine block ) and O2LO wire (to ECM) as close as possible to the wideband controller, ideally in the connector.

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