Installation Instructions for: EMS P/N 30-1710 1990-1995 Mazda Miata! WARNING: This installation is not for the tuning novice nor the PC illiterate! Use this system with EXTREME caution! The AEM EMS System allows for total flexibility in engine tuning. Misuse of this product can destroy your engine! If you are not well versed in engine dynamics and the tuning of management systems or are not PC literate, please do not attempt the installation. Refer the installation to a AEM trained tuning shop or call 800-423-0046 for technical assistance. You should also visit the AEM EMS Tech Forum at http://www.aempower.com NOTE: AEM holds no responsibility for any engine damage that results from the misuse of this product! This product is legal in California for racing vehicles only and should never be used on public highways. ADVANCED ENGINE MANAGEMENT INC. 2205 126 th Street Unit A Hawthorne, CA. 90250 Phone: (310) 484-2322 Fax: (310) 484-0152 Http://www.aempower.com Instruction Part Number: 10-1710 2003 Advanced Engine Management, Inc. Page 1 of 7
Congratulations! You have just purchased the finest Engine Management system for your car at any price! The AEM Engine Management System (EMS) is the result of extensive development on a wide variety of cars. Each system is engineered for the particular application. The AEM EMS differs from all others in several ways. The EMS is an all new stand alone system, which completely replaces the factory ECU and features unique Plug and Play Technology, which means that each system is configured especially for your make and model of car. There is no need to modify your factory wiring harness and in most cases your car may be returned to stock in a matter of minutes. The AEMPro software is configured to work with the factory sensors and equipment, so that there is no need for expensive or hard to find sensors, making replacement and repairs as simple as with an unmodified car. For stock and some slightly modified cars, the AEMPro software will be preprogrammed with a set of base parameters, providing a starting point for individual tuning. For more heavily modified cars, the EMS has many spare inputs and outputs allowing the elimination of separate rev-limiters, boost controllers, nitrous controllers, and fuel computers. It includes a configurable onboard data logger capable of recording 512kb of information. Every EMS comes with all functions installed and activated, and there are no expensive options or upgrades to be performed. The installation of the AEM ECU on the 1990-1995 Mazda Miata uses the stock sensors and actuators. The base map is automatically installed in the calibrations directory in the AEMPro directory on your computer. It is named 1710.V01.00.CAL. Full details of the test vehicle used to generate this map can be found in the files notes section. However, while the base map is a good starting point and may save you considerable time and money, it will not replace the need to tune your specific application. It is not intended to be driven aggressively. Ignoring this can and will damage your engine. Please visit the AEM EMS Tech Forum at http://www.aempower.com/bbs and register your EMS before you start to use it. Make sure you enter your EMS serial number when you register as doing this grants access to the calibration files. We always post the most current strategy release, PC Software and base calibrations online. On the forum, you will find many helpful hints/tips to make your EMS perform it s best. Also, we may make available EMS maps for engines running speed density, larger turbo, etc Read and understand these instructions BEFORE attempting to install this product. 1) Removing the Stock Engine Control Unit a) Access the stock Engine Control Unit (ECU). The location of the ECU on the Mazda Miata 1990-1993 is at the passenger firewall under the floor cover, 1994-1995 is behind the passenger seat under the rear carpet cover. b) Carefully disconnect the wiring harness from the ECU. Avoid excessive stress or pulling on the wires, as this may damage the wiring harness. Some factory ECU s use a bolt to retain the factory connectors, and it must be removed before the harness can be disconnected. There may be more than one connector, and they must all be removed without damage to work properly with the AEM ECU. Do not cut any of the wires in the factory wiring harness to remove them. Page 2 of 7
c) Remove the fasteners securing the ECU to the car body, and set it aside. Do not destroy or discard the factory ECU, as it can be reinstalled easily for street use and troubleshooting. 2) Install the AEM Engine Management System. a) Plug the factory wiring harness into the AEM ECU, and position it so that the wires are not pulled tight or stressed. Secure it with the provided Velcro fasteners. b) Plug the comms cable into the EMS and into your PC. c) Turn your ignition on but do not attempt to start the engine. d) Upload the base calibration file (.cal) that most closely matches your vehicle s configuration. (These files can be found in the AEMPro/Base Calibrations/Mazda Miata folder on your computer s hard drive) e) Set the throttle range: Select the Configure drop down menu, then ECU Setup Set Throttle Range and then follow the direction given on the screen. f) Verify the ignition timing by selecting the Configure drop down menu, then ECU Setup Set Ignition. Use a timing light and compare the physical timing numbers to the Parameter Ignition Timing displayed. Use the Advance/Retard buttons to make the timing number match. 3) You are now ready to begin tuning your vehicle. a) Note: This calibration needs to be properly tuned and is not recommended for street use. NEVER TUNE YOUR VEHICLE WHILE DRIVING. Page 3 of 7
Application Notes for EMS P/N 30-1710 1990-1995 Mazda Miata Make: Mazda Supplied Connectors: -- Model: Miata Spare Injector Drivers: Inj 5, 3K Years Covered: * 1990-1995 Spare Injector Drivers: Inj 6, 3L Engine Displacement: 1.6-1.8L Spare Injector Drivers: Inj 7, 3M Engine Configuration: I4 Spare Injector Drivers: Inj 8, 3N Firing Order: 1-3-4-2 Spare Injector Drivers: -- N/A, S/C or T/C: N/A Spare Injector Drivers: -- Load Sensor Type: MAF Spare Coil Drivers: Coil 3, 3A Map Min: N/A Spare Coil Drivers: Coil 4, 3B Map Max: N/A Spare Coil Drivers: Coil 5, 1D # Coils: 2 Spare Coil Drivers: -- Ignition driver type: 0-5V Logic Boost Solenoid: PW2, Pin 4H How to hook up a CDI: Wire after igniter EGT #1 Location: Pin 3C # Injectors: 4 (Inj 1-4) EGT #2 Location: Pin 3D Injector Flow Rate: 245 cc/min EGT #3 Location: Pin 3E Injector Resistance: 16 Ω EGT #4 Location: Pin 3F Injection Mode: Sequential Spare 0-5V Channels: Gear, Pin 4J Knock Sensors used: None Spare 0-5V Channels: Ftemp, Pin 1U Lambda Sensors used: 1 Spare 0-5V Channels: Prpress, Pin 1T Idle Motor Type: PW Spare Low Side Driver: LS4, Pin 2G Main Relay Control: No Spare Low Side Driver: LS8, Pin 2H Crank Pickup Type: Logic Spare Low Side Driver: LS12, Pin 2I Crank Teeth/Cycle: 2 teeth 4 edges Spare Low Side Driver: Idle 2, 2B Cam Pickup Type: Logic Check Engine Light: LS10, Pin 1E Cam Teeth/Cycle: 2 teeth varied lengths Spare Switch Input: -- Transmissions Offered: M/T, A/T Spare Switch Input: Switch #6, 1I Trans Supported: M/T Only A/C Switch Input: Switch #4, Pin 1Q Drive Options: RWD Clutch Switch Input: Switch #3, Pin 1V Notes: * Hooking up an MSD or CDI ignition will require complete replacement of the factory coils as they have internal igniters and are not compatible with CDI ignitions. The AEM EMS will also have to have the jumper positions for the coil outputs JPC1 JPC4 moved to positions 2&3 to provide the appropriate signal for the MSD. It is also possible to convert to a direct fire type ignition system utilizing 1 coil per plug. To do this you will need to run trigger wires from the spare coil outputs to a 4channel MSD style ignition and make appropriate changes to the software. ** All 1990 92 and 1993 Federal cars are Semi-Sequential. 1993 CA and all 1994-95 cars are Sequential. There are different base maps for sequential and batch applications. Page 4 of 7
Connection Diagram for EMS P/N 30-1710 1990-1995 Mazda Miata PnP Avail Dedicated Means the Plug and Play system comes with this configured for proper operation of this device. Is still available for reassignment by the end user. Means the function is not currently allocated and is available for use Means the location is fixed and cant be changed Pin # 1990 I/O 30-1710 EMS 1A Perm Power Input Perm Power 1B 12V Switch Input 12V switch 1C Circuit Relay N/U Not Used 1D Diagnostics Output COIL 5 1E Check Engine Output LS10 1F Diagnostics Output LS7 1G Igniter Output Coil 2 1H Igniter Output Coil 1 1I Input Switch #6 1J A/C relay Output LS9 1K Diagnostics Output FM 1L Cooling Fan (1995 only) Output LS6 1M Input Vehicle Speed Sensor 1N Closed Throttle Switch Input Switch #5 1O Brake switch Input Spare Speed 1P Power Steering pressure Input Switch #2 1Q A/C pressure switch Input Switch #4 1R Cooling fan 90-94/EGR in 95 Output LS2 1S Heater Control Input Switch #1 1T Input Prpress 1U Input Ftemp 1V Clutch switch 90-94 Input Switch #3 4A Not Used Output IDLE 1 4B Not Used Output IDLE 2 4C Not Used Output IDLE 3 4D Not Used Output IDLE 4 4E Not Used Input KNOCK 1 4F Not Used Input Spare MAP 4G Not Used Output LS4 4H Not Used Output LS8 4I Not Used Output LS12 4J Not Used Input LAMBDA 2 4K Not Used Output IDLE 5 4L Not Used Output IDLE 7 3A Not Used Output COIL 3 3B Not Used Output COIL 4 3C Not Used Input EGT 1 Page 5 of 7
3D Not Used Input EGT 2 3E Not Used Input EGT 3 3F Not Used Input EGT 4 3G Not Used Output HS1 3H Not Used Output HS2 3I Not Used Output HS3 3J Not Used Output HS4 3K Not Used Output INJ5 3L Not Used Output INJ6 3M Not Used Output INJ7 3N Not Used Output INJ8 3O Not Used Output INJ9 3P Not Used Output INJ10 2A Ground Output Ground 2B Ground Output Ground 2C Sensor Ground Output Sensor Ground 2D Sensor Ground Output Sensor Ground 2E Crank angle Input Crank 2F Chassis Ground Output Chassis Ground 2G Crank angle Input Cam 2H Short connector(timing) Output PW2 2I Tach Output LS7 2J Neutral switch 90-94/EGR pos 95 Input Gear 2K 5Vref Output 5Vref 2L Full throttle switch 90-94/Rear defrost in 95 Input TPS 2M TPS Sensor Input TPS 2N O2 Sensor Input Lambda 1 2O MAF Input MAF 2P IAT Input Air Temp 2Q Coolant Sensor Input Coolant 2R PAC solenoid in 95 only Output LS1 2S Condenser fan in 95 only Output LS5 2T Fuel pump in 95 only Output LS11 2U Injectors 1 and 3 90-93 (non CA) INJ #1 in 93CA-95 Output Inj1 2V Injectors 2 and 4 90-93 (non CA) INJ #2 in 93CA-95 Output Inj2 2W Idle control PWM Output PW1 2X Purge Output LS3 2Y Injector 3 Output INJ3 2Z Injector 4 Output INJ4 Page 6 of 7
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