TECHNICAL NOTES ON THE EEC-IV MCU - Auto diagnostics
TECHNICAL NOTES ON THE EEC-IV MCU - Auto diagnostics
TECHNICAL NOTES ON THE EEC-IV MCU - Auto diagnostics
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Eectch98-Part2.fm<br />
tion and there are likely to be others that have yet to be found. The actual memory<br />
locations, where known, are listed for the A9L.<br />
Dependent Variable Independent Variable Function A9L<br />
<strong>EEC</strong> Load Scaling Raw Load Table Row Pointer 6CB2<br />
MAF Transfer MAF Voltage Mass Flow Kg/hr 6DE2<br />
WOT Spark Advance RPM WOT Spark Advance Deg BTDC 7504<br />
WOT Spark Advance ECT WOT Spark Advance Deg BTDC 7532<br />
WOT Spark Advance ACT WOT Spark Advance Deg BTDC 7540<br />
Accelerator Enrichment Multiplier TP - A/D Counts Accelerator Enrichment Multiplier 71C1<br />
WOT Fuel Multiplier RPM WOT Fuel Multiplier 7B80<br />
Open Loop Fuel Multiplier ACT Open Loop Fuel Multiplier 7B48<br />
Spark Advance ACT Spark Advance [Deg BTDC] 74EE<br />
Spark Advance Barometric Pressure Spark Adder Deg 7528<br />
Spark Advance Rate RPM Seconds/Degree 779C<br />
Min Low Speed Dwell Battery Voltage Dwell / Coil Off Time [ms] 7748<br />
Min High Speed Dwell Battery Voltage Dwell / Coil Off Time [ms] 7760<br />
Maximum Dashpot Clip RPM Dashpot Clip [lb/min] 7346<br />
Sea Level Lugging O/L Fuel Multiplier RPM Lugging O/L Fuel Multiplier 782A<br />
Altitude Lugging O/L Fuel Multiplier RPM Lugging O/L Fuel Multiplier 7846<br />
Crank Fuel Pulse Width Multiplier Time in Crank Mode Crank Fuel Multiplier 729A<br />
Cranking Fuel Pulsewidth ECT Pulsewidth [ms] 787A<br />
Injector Offset vs. Battery Voltage Battery Voltage Injector Offset 7B30<br />
Open Loop Fuel Multiplier RPM Open Loop Fuel Multiplier 7DE8<br />
Dashpot Decrement Rate Dashpot[lb/min] Decrement Rate [lb/min] 732A<br />
WOT Fuel Multiplier TP<br />
Part Throttle Spark Advance<br />
Closed Throttle Open Loop Fuel Multiplier<br />
Altitude Fuel Adjustment<br />
ACT<br />
Cranking Fuel ECT<br />
Transmission TV Pressure TP<br />
Torque Converter Lockup TP<br />
Upshift Speed TP<br />
Downshift Speed<br />
Idle Airflow<br />
TP<br />
Table 17: <strong>EEC</strong> Functions<br />
<strong>EEC</strong> SCALARS<br />
Scalar A9L<br />
Injector Size<br />
Injector Slope<br />
Minimum Injector Pulse Width<br />
Accelerator Pump Multiplier<br />
Open Loop Fuel Multiplier<br />
Part Throttle Timing Adder<br />
Dwell Minimum<br />
Dwell Maximum<br />
ACT Minimum for Adaptive Control<br />
ACT Maximum for Adaptive Control<br />
Minimum ECT for Deceleration Fuel Shutoff<br />
Minimum RPM for Deceleration Fuel Shutoff<br />
Minimum Load (MAP) for Closed Loop<br />
Hi-load Timeout to Open Loop<br />
Table 18: <strong>EEC</strong> Scalars<br />
<strong>EEC</strong>-<strong>IV</strong> Technical Notes: Software 26 last edited: 9/29/98
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