TECHNICAL NOTES ON THE EEC-IV MCU - Auto diagnostics

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"Throttle Rate [Deg/sec] vs ECT "table:29131,8,7,1,d4,0 :1.5,1.5,2,3,4.5,8,12,18 :1.5,1.5,2,3,4.5,8,12,20 :2,2,3,4.5,8,12.5,18,29 :4,5,6,8,12.5,17,25.5,34 :5,8,10,12,16.5,21,27,45 :12,14,16,18,26,30,38,55 :21,23,26,28,31,34,39,56 "end "Startup Fuel [A/F Ratio] "ECT vs. Time "table:31808,10,8,1,d8,0 :0,0,0,0,0,0,0,0,0,0 :1,1.25,0.875,0.5,0.375,0.875,0.875,0.25,0.5,1 :1.25,1.5,1.125,1,1,1.25,1.25,0.875,1,1.25 :1.625,1.625,1.5,1.375,1.25,1.375,1.375,1.125,1.375,1.625 :2.25,2.125,2.125,1.875,1.875,1.875,1.875,1.25,1.875,2.25 :2.75,2.75,2.375,1.875,1.875,1.875,1.875,1.5,1.875,2.75 :2.875,3.625,2.625,1.875,1.875,1.875,1.875,1.625,1.875,2.875 :3.375,4.125,3,1.875,1.875,1.875,1.875,1.375,1.875,3.375 "end "Base Fuel [A/F Ratio] "ECT vs. Load "table:31728,10,8,1,d8,0 :10.5,10.5,12.5,12.5,12.75,13.125,13.5,13.5,13.5,13.5 :11.25,11.25,12.75,12.75,13.125,13.5,13.75,13.75,13.625,13.5 :12.125,12.125,13.5,13.5,13.875,14.375,14.125,14.25,13.625,13.625 :12.75,13.875,14.25,14.375,14.875,14.875,15.25,16,16,15 :13.625,14.375,14.375,14.375,14.875,15.25,15.25,16,16,14.75 :14.125,14.25,14.25,14.375,14.5,14.75,14.75,15.25,15.25,14.375 :17.625,17.625,17,16.625,16.5,16.375,16,15.25,15.25,15.25 :17.875,17.875,17.625,17.25,16.625,16.375,16,15.25,15.25,15.25 "end "Injector Timing [Crank Degrees] "RPM vs. Load "table:29024,10,8,1,m4,0 :420,420,420,420,420,420,420,464,464,464 :420,420,420,420,420,420,420,464,464,464 :380,380,380,380,380,380,420,420,464,464 :352,352,352,352,352,380,400,400,400,400 :352,352,352,352,352,352,352,352,352,352 :352,352,352,352,352,352,352,352,352,352 :352,352,352,352,352,352,352,352,352,352 :352,352,352,352,352,352,352,352,352,352 "end "Load Injector Firing Order "Injector to Fire vs. "table:29113,8,1,1,1,0 :1,3,7,2,6,5,4,8 "end "Base Spark [Deg BTDC] "RPM vs. Load "table:30068,10,8,1,d4,0 :11.5,11.5,13,13,15.5,18.25,23.5,27.25,27.25,27.25 :11.5,14.25,14.25,14.25,17,19.5,27.25,27.25,27.25,27.25 :17.25,17.25,18.5,18.5,20.75,23,26.5,31.25,31.25,31.25 :23,24.25,28.75,32.25,35.75,37,38,39,32.25,32.25 :28.75,30,32.25,33.25,37,37,43.75,46,32.25,32.25 :28,28,33,41.5,41.5,42.75,43.75,43.75,32.25,32.25 :28,28,28,31.25,33.25,34.25,34.25,34.25,28.25,28.25 :28,28,28,27.25,29,30,30,30,30,30 "end "Altitude Base Spark [Deg BTDC] "RPM vs. Load "table:30148,10,8,1,d4,0 :11.5,11.5,13,13,14.25,17,27.25,27.25,27.25,27.25 :11.5,11.5,13,13,14.25,18.25,27.25,27.25,27.25,27.25 Eectch98-Part2.fm EEC-IV Technical Notes: Software 40 last edited: 9/29/98
Eectch98-Part2.fm :17.25,18.5,18.5,18.5,20.75,23,30,31.25,31.25,31.25 :23,24.25,28.75,37,39,39,38,37,32.25,32.25 :28.75,30,34.5,42.75,43.75,41.5,41.5,43.75,32.25,32.25 :28,28,33,42.75,42.75,43.75,43.75,43.75,32.25,32.25 :28,28,28,32.25,34.25,35.25,35.25,34.25,28.25,28.25 :28,28,28,27.25,29,30,30,30,30,30 "end "Limp Mode Spark Table [Deg BTDC] "RPM vs. Load "table:30228,10,8,1,d4,0 :9.25,9.25,13,13,15.5,18.25,23.5,23.5,23.5,23.5 :9.25,11.5,13,13,15.5,18.25,23.5,23.5,23.5,23.5 :9,10.25,11.5,12.75,15,19.75,25.5,25.5,25.5,25.5 :16,16,16,16,18.5,24.25,31.25,31.25,31.25,31.25 :23,24.25,23,27.5,35.75,37,38,38,38,38 :25,26,30.5,38.75,40.25,42,43.75,43.75,43.75,43.75 :28,28,28,31.25,33.25,34.25,34.25,34.25,34.25,34.25 :28,28,28,27.25,29,30,30,30,30,30 "end "Injector Output Port "Injector Port vs. "table:29105,8,1,1,1,0 :0,0,0,0,2,2,2,2 "end "EEC Load Scaling "func:27826,24,2,d32768,0,2,d256,0 Raw Load:0,0.04998779296875,0.100006103515625,0.600006103515625,0.75,1.99996948242188 Table Row Pointer:0,0,1,6,7,7 "end "MAF Transfer "func:28130,120,2,d4096,0,2,d4,0 MAF Voltage:0,0,0,0,0.571044921875,0.75,0.884033203125,1.091064453125,1.181884765625,1.321044921875,1.468 017578125,1.573974609375,1.69091796875,1.802978515625,1.889892578125,1.989013671875,2.154052734375,2. 31591796875,2.449951171875,2.58203125,2.694091796875,2.909912109375,3.14892578125,3.35498046875,3.543 9453125,3.885986328125,4.177001953125,4.443115234375,4.76806640625,15.999755859375 Mass Flow Kg/ hr:10.75,10.75,10.75,10.75,10.75,14.75,18.75,25.75,29,35.25,42.75,49.25,57.5,65,71.25,79,94.75,112.25 ,127.25,144,159.25,192,233.25,274.25,315,394.25,470.25,548.75,659.25,659.25 "end "WOT Spark Advance vs. RPM "func:29956,32,2,d4,0,2,d4,1 RPM:0,1000,1800,2150,2600,3500,5000,16383.75 WOT Spark Advance Deg BTDC:10.25,10.25,22.25,25.75,26.75,26.75,30.25,30.25 "end "WOT Spark Advance vs. ECT "func:30002,14,1,m2,1,1,d4,1 Engine Coolant Temp:-256,86,120,200,236,246,254 WOT Spark Advance Deg BTDC:3,3,0,0,-2,-4,-4 "end "WOT Spark Advance vs. ACT "func:30016,12,1,m2,1,1,d4,1 Intake Air Charge Temp:-256,-256,-256,150,240,254 WOT Spark Advance Deg BTDC:0,0,0,0,-6,-6 "end "Accelerator Enrichment Multiplier vs. TP "func:29121,10,1,m4,0,1,d128,0 Throttle Position-A/D Counts:0,200,452,852,1020 Accelerator Enrichment Multiplier:1,0.953125,0.296875,0,0 "end "WOT Fuel Multiplier vs. RPM "func:31616,32,2,d4,0,2,d128,0 RPM:0,1600,2400,3200,3800,4400,6000,16383.75 WOT Fuel Multiplier:1,0.90625,0.96875,0.9453125,0.9765625,0.953125,0.9453125,0.9453125 "end "Open Loop Fuel Multiplier vs. ACT "func:31560,12,1,m2,1,1,d64,0 Intake Air ChargeTemp:-256,-256,-40,0,76,254 EEC-IV Technical Notes: Software 41 last edited: 9/29/98
Page 1 and 2: TECHNICAL NOTES ON THE EEC-IV MCU I
Page 3 and 4: Eectch98-Intro.fm Below is a list o
Page 5 and 6: Technical Notes on the EEC-IV MCU E
Page 7 and 8: Figure: 8061 Microprocessor Figure:
Page 9 and 10: High Speed Output Unit HOLDING REGI
Page 11 and 12: Eectch98-Part1.fm logic analyzer. T
Page 13 and 14: 8763 EPROM (IC-8) 8 GND RP4 20 CPU-
Page 15 and 16: 0B nu 0C SHRL SHRDW logical right s
Page 17 and 18: FC CLRVT CLRVT clear overflow trap
Page 19 and 20: 29 27 25 23 21 19 17 15 13 11 9 7 5
Page 21 and 22: No Mustang A9L '91 Ranger 2.3 '91 4
Page 23 and 24: Eectch98-Part2.fm some flow related
Page 25 and 26: Eectch98-Part2.fm mation and has th
Page 27 and 28: Scalar A9L Idle Speed Neutral Idle
Page 29 and 30: T I M E 45.00 0 0 0 0 0 0 0 0 0 0 3
Page 31 and 32: values. Divide them by 4 to convert
Page 33 and 34: ECT Advance -256 2 86 3 120 0 200 0
Page 35 and 36: RPM Seconds/ Degree 0 2.0000 0 2.00
Page 37 and 38: ECT Pulse Width (mS) 150 2.35546875
Page 39: Eectch98-Part2.fm (Note that, in In
Page 43 and 44: min]:0.00341796875,0.0029296875,0.0
Page 45 and 46: A0 0F 0F A0 29 00 00 29 00 00 00 00
Page 47 and 48: Eectch98-Part3.fm would be equivale
Page 49 and 50: InHg is barometric pressure. TempF
Page 51 and 52: L/min Lo meter AFM1 AFM2 Hi meter A
Page 53 and 54: Eectch98-Part4.fm put the next byte
Page 55 and 56: Eectch98-Part4.fm goes to an HSO po
Page 57 and 58: Eectch98-Part5.fm • Air Meter Pin
Page 59 and 60: Eectch98-Part5.fm be better off wit
Page 61 and 62: RPM 800 1200 1600 2000 2400 2800 32
Page 63 and 64: Eectch98-Part5.fm 16d (Table 1). Al
Page 65 and 66: Eectch98-Part5.fm To achieve the EP
Page 67 and 68: Eectch98-Part5.fm only way out of n
Page 69 and 70: Eectch98-Part5.fm not cutting it up
Page 71 and 72: Eectch98-Part5.fm · Boost Retard S
Page 73 and 74: Eectch98-Part6.fm engine vehicle ye
Page 75 and 76: Eectch98-Part6.fm engine vehicle ye
Page 77 and 78: Abbrev. Meaning DVOM Digital Volt/O
Page 79: diagrams and tips on hot-rodding EE

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