TECHNICAL NOTES ON THE EEC-IV MCU - Auto diagnostics

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Eectch98-Part2.fm Open Loop Fuel Multiplier:0.640625,0.640625,0.640625,0.8125,1,1 "end "Spark Advance vs. ACT "func:29934,10,1,m2,1,1,d4,1 Air Charge Temperature:-256,-256,160,190,254 Spark Advance [Deg BTDC]:0,0,0,-2,-2 "end "Spark Advance vs. BP "func:29992,10,1,d8,0,1,d4,1 Barometric Pressure:0,23.5,26.5,27.75,31.875 Spark Adder Deg:12,4,4,0,0 "end "Spark Advance Rate vs. RPM "func:30620,12,1,m32,0,1,d16,0 RPM:0,0,992,3008,4000,8160 Seconds/Degree:2,2,2,1.5,1,1 "end "Min Low Speed Dwell "func:30536,24,2,d16,0,2,d4,0 Battery Voltage:0,10,12,14,15,4095.9375 Dwell / Coil Off Time [ms]:589.75,589.75,524.25,393.25,367,367 "end "Min High Speed Dwell "func:30560,24,2,d16,0,2,d4,0 Battery Voltage:0,10,12,13,15,4095.9375 Dwell / Coil Off Time [ms]:655.25,655.25,485,439,393.25,393.25 "end "Maximum Dashpot Clip "func:29510,20,2,d4,0,2,d4096,0 RPM:0,500,1500,2000,16383.75 Dashpot Clip [lb/min]:0.1201171875,0.1201171875,1,1.60009765625,1.60009765625 "end "Sea Level Lugging O/L Fuel Multiplier "func:30762,28,2,d4,0,2,d128,0 RPM:0,0,650,750,1200,1500,16383.75 Lugging O/L Fuel Multiplier:1,1,1,1.203125,1.203125,1,1 "end "Altitude Lugging O/L Fuel Multiplier "func:30790,28,2,d4,0,2,d128,0 RPM:0,0,0,0,0,0,16383.75 Lugging O/L Fuel Multiplier:1,1,1,1,1,1,1 "end "Crank Fuel Pulse Width Multiplier "func:29338,24,2,d8,0,2,d128,0 Time in Crank Mode:0,0,0,0,0,8191.875 Crank Fuel Multiplier:1,1,1,1,1,1 "end "Cranking Fuel Pulse width vs. ECT "func:30842,36,2,m2,1,2,d256,0 Engine Coolant Temperature:-65536,-20,0,20,40,70,150,180,65534 Pulse width [ms]:39.69140625,39.69140625,22.4140625,14.48828125,10.75390625,5.8359375,2.35546875,2.046875,2.04687 5 "end "Injector Offset vs. Battery Voltage "func:31536,24,1,d16,0,1,d32,0 Battery Voltage:0,5.5,6,7,8,9,10,11,12,13,14,15.9375 InjectorOffset:7.5,7.5,5.53125,3.53125,2.59375,2.03125,1.6875,1.40625,1.15625,1,0.90625,0.90625 "end "Open Loop Fuel Multiplier vs. RPM "func:32232,24,2,d4,0,2,d128,0 RPM:0,0,0,1075,1100,16383.75 Open Loop Fuel Multiplier:1,1,1,1,0,0 "end "Dashpot Decrement Rate "func:29482,28,2,d4096,0,2,d4096,0 Dashpot[lb/min]:0,0.06201171875,0.35009765625,0.449951171875,0.64990234375,0.75,15.999755859375 Decrement Rate [lb/ EEC-IV Technical Notes: Software 42 last edited: 9/29/98
min]:0.00341796875,0.0029296875,0.001953125,0.007080078125,0.044921875,0.0625,0.0625 "end (Bill Lawrance wrote) A9L Table Format Explanation Eectch98-Part2.fm I’m putting this note in front of Gary Anderson’s recent post on tables for the A9L. I hope it helps in understanding them. Gary has done a great piece of work here. He deserves real credit for digging this out. Everything I’ve added here I got from studying his post. This note describes how the tables displayed in the post are represented in the EPROM. I got this from reading the program. This is only useful or interesting if you want to see how this is done. Nothing in the original post or in this note tells how these tables are actually used, although their titles are descriptive. Neither are there any units on the axes of the tables, although their titles are also descriptive. There are 2 types of tables displayed. --------------- 1) Two dimension Tables --------------- The first of the two kinds of tables is identified in the output with ’table’ in the third line of output for a table. For example, the first table listed is: "Accel Enrichment Fuel [lb/min] "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 --The first line is the title of the table --The second line is "X-axis label vs. Y-axis label" --The third line is decoded as follows: table -- identifies this as a 2 dimension table 29131 -- the decimal location of the table in the PROM (or 71CB hex ) 8 -- the number of columns (X-axis) in the table 7 -- the number of rows (Y-axis) in the table 1 -- number of bytes for each value in the table d4 -- the scale of the value, in this case divide by 4 to get lb/min of fuel that each entry represents. ’m’ is used in other tables to specify ’multiply each entry’. From the binary: 0 -- each entry is unsigned 0071C0 - 54 5C 68 70 7C 0071D0 88 9C E0 30 38 40 48 68-78 98 DC 14 20 28 30 42 0071E0 54 6C B4 10 14 18 20 32-44 66 88 08 08 0C 12 20 0071F0 32 48 74 06 06 08 0C 12-20 30 50 06 06 08 0C 12 007200 20 30 48 Grouping into rows of 8 columns: 54 5C 68 70 7C 88 9C E0 30 38 40 48 68 78 98 DC 14 20 28 30 42 54 6C B4 10 14 18 20 32 44 66 88 08 08 0C 12 20 32 48 74 06 06 08 0C 12 20 30 50 06 06 08 0C 12 20 30 48 EEC-IV Technical Notes: Software 43 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 and 40: Eectch98-Part2.fm (Note that, in In
Page 41: Eectch98-Part2.fm :17.25,18.5,18.5,
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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