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Page 3 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
Table of Contents
General Information ...................................................................................................................... 6
Electronics Warranty ..................................................................................................................... 6
Part 1
– EMS-4 Installation ........................................................................................................... 7
EMS-4 Basic Specifications ...................................................................................................... 7
Wire Harness Options ............................................................................................................... 7
ECU Terminations with Mini Harness, P/N 30-2905-0 ......................................................... 10
Electronic Wiring Conventions ............................................................................................. 16
Grounding ............................................................................................................................ 17
Power Requirements of the AEM EMS ................................................................................ 17
Use of Relays to Control Ancillary Devices ......................................................................... 17
Installation with Full Harness, P/N 30-3905-96 ....................................................................... 18
USB Connector .................................................................................................................... 18
CAN Connector .................................................................................................................... 19
Injectors ............................................................................................................................... 19
Coils / Electronic Ignition System Basics ............................................................................. 21
TPS (Throttle Position Sensor) ............................................................................................ 26
MAP Sensor ......................................................................................................................... 26
Air Temp Sensor .................................................................................................................. 27
Water Temp Sensor ............................................................................................................. 28
Crank Sensor ....................................................................................................................... 29
Cam Sensor ......................................................................................................................... 33
Vehicle Speed Sensor (VSS) ............................................................................................... 34
Part 2
– AEM Tuner .................................................................................................................... 37
Software Installation ................................................................................................................ 37
AEM Tuner .............................................................................................................................. 39
Basic Terminology ............................................................................................................... 40
Menu Items .......................................................................................................................... 42
Editing EMS Calibration Files .................................................................................................. 77
Editing Options Displays ...................................................................................................... 77
Editing 2D Table Displays .................................................................................................... 81
Editing Channel Displays ..................................................................................................... 89
Editing 3D Map Displays ...................................................................................................... 90
