Here's FACTEST_1:

F078
F078 ; =============== S U B R O U T I N E =======================================
F078
F078 ; a factory test routine
F078 ; Attributes: noreturn
F078
F078 FACTEST_1: ; CODE XREF: factory_test+64P
F078 ; FACTEST_1+1Fj ...
F078 86 04 ldaa #4
F07A B5 10 23 bita byte_1023 ; TIC/TOC interrupt source
F07A ; b0 IC3 (VATS)
F07A ; b1 IC2 (cam sensor)
F07A ; b2 IC1 (3X crank sensor)
F07A ; b3 IC4/OC5 (24X crank sensor)
F07A ; b4 OC4
F07A ; b5 OC3 (4000 PPM VSS signal)
F07A ; b6 OC2 (160Hz interrupt)
F07A ; b7 OC1
F07D 27 06 beq loc_F085
F07F B7 10 23 staa byte_1023 ; TIC/TOC interrupt source
F07F ; b0 IC3 (VATS)
F07F ; b1 IC2 (cam sensor)
F07F ; b2 IC1 (3X crank sensor)
F07F ; b3 IC4/OC5 (24X crank sensor)
F07F ; b4 OC4
F07F ; b5 OC3 (4000 PPM VSS signal)
F07F ; b6 OC2 (160Hz interrupt)
F07F ; b7 OC1
F082 BD EF CB jsr sub_EFCB ; TIC 1
F085
F085 loc_F085: ; CODE XREF: FACTEST_1+5j
F085 86 20 ldaa #0x20 ; ' '
F087 B5 10 23 bita byte_1023 ; TIC/TOC interrupt source
F087 ; b0 IC3 (VATS)
F087 ; b1 IC2 (cam sensor)
F087 ; b2 IC1 (3X crank sensor)
F087 ; b3 IC4/OC5 (24X crank sensor)
F087 ; b4 OC4
F087 ; b5 OC3 (4000 PPM VSS signal)
F087 ; b6 OC2 (160Hz interrupt)
F087 ; b7 OC1
F08A 27 06 beq loc_F092
F08C B7 10 23 staa byte_1023 ; TIC/TOC interrupt source
F08C ; b0 IC3 (VATS)
F08C ; b1 IC2 (cam sensor)
F08C ; b2 IC1 (3X crank sensor)
F08C ; b3 IC4/OC5 (24X crank sensor)
F08C ; b4 OC4
F08C ; b5 OC3 (4000 PPM VSS signal)
F08C ; b6 OC2 (160Hz interrupt)
F08C ; b7 OC1
F08F BD EF F7 jsr toggle_4000PPM_speedo_circuit ; TOC 3
F092
F092 loc_F092: ; CODE XREF: FACTEST_1+12j
F092 86 40 ldaa #0x40 ; '@'
F094 B5 10 23 bita byte_1023 ; TIC/TOC interrupt source
F094 ; b0 IC3 (VATS)
F094 ; b1 IC2 (cam sensor)
F094 ; b2 IC1 (3X crank sensor)
F094 ; b3 IC4/OC5 (24X crank sensor)
F094 ; b4 OC4
F094 ; b5 OC3 (4000 PPM VSS signal)
F094 ; b6 OC2 (160Hz interrupt)
F094 ; b7 OC1
F097 27 DF beq FACTEST_1 ; a factory test routine
F099 B7 10 23 staa byte_1023 ; TIC/TOC interrupt source
F099 ; b0 IC3 (VATS)
F099 ; b1 IC2 (cam sensor)
F099 ; b2 IC1 (3X crank sensor)
F099 ; b3 IC4/OC5 (24X crank sensor)
F099 ; b4 OC4
F099 ; b5 OC3 (4000 PPM VSS signal)
F099 ; b6 OC2 (160Hz interrupt)
F099 ; b7 OC1
F09C FC 10 18 ldd word_1018 ; TOC 2
F09F C3 03 33 addd #0x333
F0A2 FD 10 18 std word_1018 ; TOC2 (160Hz interrupt)
F0A5 BD EF 46 jsr COP_RESET
F0A8 CC 00 00 ldd #0 ; channel 0(?)
F0AB BD F1 3A jsr analog_to_digi_plus_store_AndA_byte1F_to_1060 ; channel 0(batt volts)
F0AE 81 28 cmpa #0x28 ; '(' ; 4.0
F0B0 25 03 bcs loc_F0B5
F0B2 BD EF 50 jsr TOGGLE_1066_0x80
F0B5
F0B5 loc_F0B5: ; CODE XREF: FACTEST_1+38j
F0B5 96 00 ldaa *byte_0 ; Timer, each count is 0.00625 seconds
F0B7 4C inca
F0B8 81 0C cmpa #0xC
F0BA 25 01 bcs loc_F0BD ; branch if still lower than .075 secs
F0BC 4F clra
F0BD
F0BD loc_F0BD: ; CODE XREF: FACTEST_1+42j
F0BD 97 00 staa *byte_0 ; Timer, each count is 0.00625 seconds
F0BF 84 03 anda #3
F0C1 26 B5 bne FACTEST_1 ; a factory test routine
F0C3 BD F0 D3 jsr FACTEST_2
F0C6 BD F1 1E jsr FACTEST_3
F0C9 B6 10 08 ldaa byte_1008
F0CC 85 01 bita #1
F0CE 27 A8 beq FACTEST_1 ; a factory test routine
F0D0 BD B5 55 jsr sub_B555
F0D0 ; End of function FACTEST_1
F0D0
F0D3

At the end of this one, you can see references to two more factory test routines. If posting them is helpful, I'll keep going, otherwise, I'll wait to see how I should handle this.