Technically, that's a pull down not a pull up.
This would be a pull up with an NPN open collector (much more common).
My DIYPNPF60 has the TFI circuit on the connector board.
No schematic, but description:
DIYPNP Ford 60 Pin Adapter Board Assembly
We've put a little step-up circuit on the F60 adapter board for TFI ignition control. This takes the 5 volt IGN signal, inverts it, and steps it up to 12 volts for TFI distributors.
I'll have to find the BOM for Q1A, R1A, R2A. Not shown on my BOM.
I think it's the following:
Q1A - 2N2222A
R1A, R2A - 1K 1/4W resistor
Circuit is in lower left corner of ECU.
1988 GT, 57k mi, Orig Owner
ProCharger P600B, FRPP Headers, Flowmaster F2, 3G Alt, Mk8 Fan/DCC, 3.55's, Prog Springs, ST Brace, G/Trac Bar, Subfrms, UCA, LCA, FCA, Tokico 5-ways, C/C Plates, CSA 16x8, Bridgestone RE760 Sport 225/50R16, Megasquirt DIYPNPF60, LC2 WBO2, C&L76mm MAF w/LU47's