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04-10-2020, 01:24 PM
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#21 | |
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Badcaps Veteran
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 1,742
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Re: Psom circuit help
This is a custom Ford IC. IC1 70013FB Motorola looks like five subsystems in it. 9V regulator (pin 1,2,16) with IGN shutdown (pin 6), 5V regulator (pin 16 in,15 out), variable-reluctance pickup amplifier from rear axle (pin 10,11), and then that speed output (pin 14) to the MCU or cruise control. Reset pulse (pin 15). GND is pins 4,5,12,13.
It's important to get at least 9V and 5V power up and running. Mystery pin 8 seems to go to the MCU or the white connector. There might be a pulsing watchdog feature in the IC, so the MCU sends pulse to it on pin 8 and if nothing there, then IC1 a reset pulse gets made. Really with no datasheet this is just guessing. Quote:
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04-10-2020, 04:57 PM
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#22 |
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Member
Join Date: Feb 2011
Posts: 91
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Re: Psom circuit help
So if you were a betting man, I should remove the IC1 from working board and hope that takes care of problem?
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04-10-2020, 09:31 PM
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#23 |
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Member
Join Date: Feb 2011
Posts: 91
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Re: Psom circuit help
Would you think IC4 is some type of controller?
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04-11-2020, 05:58 AM
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#24 |
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Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 22,644
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Re: Psom circuit help
ic4 is a microcontroller - probably from motorola,
ic2 is an eeprom for running data - probably your mileage etc. |
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