s p o n s o r e d   l i n k s


Technical Notes on the EEC-IV MCU.pdf

February 2, 2009 · Filed Under Others  · Tags: ,

Purpose of this Technical Notes (taken from Purpose): This data has been collected and compiled to help you decipher the EEC-IV inner workings. The EEC MCU probably controls one or more vehicles you own, plus it contains all the components necessary to build an EFI system for any vehicle — if only we could program and modify it. That is the purpose — to uncloak the EEC-IV so that we can play with what we bought! Much of the empirical data in this document is specific to the A9L EEC computer. That is the model MotorSport SVO sells for conversion of Mustangs from SD to MAF, and it was stock on 5-speed manual transmission Mustangs from 1989 to 1993, so consensus was reached to pursue this one configuration until it was understood rather than divide our efforts chasing many.

Taken from Overview: The EEC-IV design began in 1978 and was first introduced in 1983 in the 1.6L Escort, Lynx, EXP and LN7 cars. It has gone through several major physical changes, the earliest using a fairly simple two board design with through hole soldered components while the last are more current in technology, showing extensive use of surface mount components and a much more finished and complex appearance. In between, there appears to be a variety of mother/daughter board and other designs. Still, they are all called EEC-IV, although somewhere in its life there was a Ford P/N generational change.

The reader is referred to the SAE paper #820900, noted in the reference section at the end of this document, for a much more detailed description of the design goals and operation of the EEC-IV MCU.

One person wrote: “The processor used is the 8065 along with several supporting peripheral chips like the DUCE chip which can provide up to 8 PWM outputs and the DARC chip which has 6 channels of timer capture inputs.” (Is he talking about the EEC-V here ?)

The EEC module is rated to 80oC (185oF) continuous, 100oC intermittent, so it will be much happier and live longer in the passenger compartment. Some of the later generation 15 and 18 MHz Motorola 8061 processors have a bus loading/edge timing sensitivity that only gets worse at high temperature, so it’s best to keep the EEC in a more hospitable environment. Additionally, mounting the EEC in the passenger compartment will give you better access to the J3 test port, which is where you’ll be plugging in an after-market module or any test / modification device.

The J3 test port on the side of the ECU box is for developers to plug into — this is how the after-market chipmakers and others get into the box. The test connector has the micro-controller’s multiplexed address/data bus signals on it. It also, very conveniently, has a PROM disable signal. So the chip makers design something that hangs off that connector, disables the computer’s PROM, and substitutes its own PROM in its place.

The reader is encouraged to investigate the Intel 8096 (MCS-96) literature for greater insight into the 8061 processor used in the EEC. One document available from their web site is “27006102.pdf” entitled “APPLICATION NOTE; AP-248; Using The 8096″; Order Number: 270061-002. There are many other related documents available from Intel — including the use of the A-D converter, the implementation of “fuzzy logic”, instrumenting and controlling automotive applications, and other topics.

Parts of Table of Contents:

  • HARDWARE

      EEC is widely used by Ford vehicles such as: Bronco, Mustang, Truck CA, Scorpio, Escort, F350, Crown Victoria, Ranger, Explorer, Cougar, Taurus, MK8, MK7 etc.

    • THE MICROPROCESSOR / MEMORY CHIP SET: [ Table 3: EEC Chipset Nomenclature Legend ~ Table 4: 8061 CPU Pinout ~ Table 5: 8361 RAM/IO Pinout ~ Table 6: 87C61 RAM/IO Pinout ~ Table 7: 8763 EPROM Pinout ~ Table 8: 8061 Chipset Legend ]
    • 8061 MEMORY MAP
    • 8061 INSTRUCTIONS, REGISTERS & INTERRUPTS [ Table 9: 8096-8061/5 Instruction Differences ~ Table 10: 8096-8061 Op-Codes ~ Table 11: Op-Code Map 00-70 ~ Table 12: Op-Code Map 80-FF ~ Table 13: 8061 Interrupt Vectors and Priorities ~ Table 14: Register Map ]
    • ECM TEST PORT (J3) [ Table 15: ECM Test Port (J3) Pinout ]
    • ECM WIRING HARNESS [ Table 16: ECM CABLE PINOUT ]
  • SOFTWARE
    • THE BASICS
    • INTERNAL DIAGNOSTICS
    • FUEL CONTROL
    • IGNITION AND TIMING CONTROL:
    • LIMITED OUTPUT STRATEGY (LOS) OPERATION
    • FUNCTIONS / SCALARS / TABLES [ Table 17: EEC Functions ~ Table 18: EEC Scalars ~ Table 19: Example Scalars from Calibrator Demo ~ A9L Constants & Locations ~ Table 20: EEC Tables ~ Table 21: Accel Enrichment Fuel [lb/min] ~ Table 22: Startup Fuel Ratio ~ Base Fuel A:F Ratio: ~ Table 23: Base Fuel A:F Ratio ~ Table 24: Injector Timing ~ Table 25: Injector Firing Order ~ Table 26: Base Spark [Deg BTDC] ~ Table 27: Altitude Base Spark [Deg BTDC] ~ Table 28: Limp Mode Spark Table [Deg BTDC] ~ Table 29: Injector Output Port Table ~ Table 30: Load Scaling ~ Table 31: MAF Transfer Function ~ Table 32: WOT Spark Advance vs RPM ~ Table 33: WOT Spark Advance vs. ECT ~ Table 34: WOT Spark Advance vs. ACT ~ Table 35: Accelerator Enrichment Multiplier vs TP ~ Table 36: Open Loop Fuel Multiplier vs. ACT ~ Table 37: Spark Advance vs. ACT ~ Table 38: Spark Advance vs. BP ~ Table 39: Spark Advance Rate vs. RPM ~ Table 40: Minimum Low Speed Dwell ~ Table 41: Minimum High Speed Dwell ~ Table 42: Maximum Dashpot Clip ~ Table 43: Sea Level Lugging O/L Fuel Multiplier ~ Table 44: Altitude Lugging O/L Fuel Multiplier ~ Table 45: Crank Fuel Pulse Width Multiplier ~ Table 46: Cranking Fuel Pulse width vs. ECT ~ Table 47: Injector Offset vs. Battery Voltage ~ Table 48: Open Loop Fuel Multiplier vs. RPM ~ Data Pointers ~ Idle Speed Constants ~ Table 49: A9L Idle Speed Addresses ~ Speed Limiters ~ Rev Limiter ~ Half Fuel Limits ~ A9L Tables ~ A9L Table Format Explanation ~ DA1 Constants & Locations ]
  • SENSORS
    • EGO
    • EGR
    • ACT
    • TFI / PIP
    • KNOCK SENSOR
    • VSS
    • AFM
  • EXTERNAL (SERVICE PORT) CONTROL
    • EEC MEMORY CONTROL
    • EEC-IV / EEC-V FLASH MEMORY
  • EEC EFI MODIFICATIONS & UPGRADES
    • SD TO MAF CONVERSION
    • NOTES FOR TRUCK APPLICATIONS:
    • TUNING [ Introduction ~ What Is Being Modified ~ List Of Tables ~ Table 56: Spark Table (RPM vs Vacuum kPa) ~ Tuning Tools ~ Table 57: Power Enrich Spark (RPM vs. Added Spark Advance) ~ Table 58: Volumetric Efficiency (MAP vs. RPM) ~ Table 59: Volumetric Efficiency WOT Enable (RPM vs. Additional fuel factor) ~ Table 60: %Throttle Position Sensor for Wide Open Throttle (RPM vs. % factor) ~ O2 Sensors And Indicators ~ Where To Start ~ Idle ~ Light Cruise ~ WOT ~ Mild Performance Engines, Engine Swaps ~ Real Fire Breathing Hot Rods ~ General Tuning Tips ~ A Note About Timing ~ Maf System Differences ~ Attachment A ]
    • EPEC
  • REFERENCE
    • EEC APPLICATIONS
    • TERMS
    • EEC-IV REFERENCE SOURCES:
    • AFTER-MARKET SUPPLIERS:

This pdf material is available FREE at yana-bg.com website, we merely collect the information, we are neither affiliated with the author(s), the website and any brands nor responsible for its content and change of content. (Read our disclaimer here or here before you download the document from the website written above by clicking the below link).

Download free:

.

Related posts




You might also be interested in reading:
eec iv, eec-iv, SPARK IV download, ford eec iv, eec download, download eec, Ford Explorer, ford efi, FORD RANGER, mcu pdf
« Prev
Next »

Disclaimer

http://www.onlinefreeebooks.net - provides you collection of links to other websites containing ebooks/manuals/cheatsheets either for computer geeks, technicians, automotive enthusiasts or programmers. We merely take the power of Google Search to find those materials and link to it. NONE OF THOSE MATERIALS ARE HOSTED IN THIS SERVER NOR UPLOADED BY ME IN SOMEONE'S SERVERS.

We are neither affiliated with authors and brands nor responsible for its content and change of content.

Information contained herein is provided "as is" without warranty of any kind, either expressed or implied, including any warranty of merchantability or fitness for a particular purpose. In no event shall ANYONE be held liable for any loss of profit, special, incidental, consequential, or other similar claims.

Comments

Leave a Reply