Installation Instructions for: EMS P/N 30
Contents
1. els s Lene 2 1 855 Seats 171611511411311 21 110 9 8 1ad8smrmem5n1a4d342H1H0 9 8 1615114131211110 9 8 7 zheh shalishzfhio 9 8 PPA SAPS 22 2 20 19 18 2728 2524 23p2 21 20 272852524 2322 2120 19 184 7 2524 2322 2120 1918 3433 32 31302928 3534 23532 315830 28 28 13534 33132 31 302828 3130 2028 27128 Connector Connector B Connector C Connector D Page 16 of 20 Pins 2004STI25L 2005 2006 STI25L AEM EMS 30 1820 30 1821 UO Availability Notes Bi GND Power Supply Power Ground in PETAS B2 Rear Oxygen Sensor heater signal o o Notused 0 0 B3 Pe Noted B4 GND Power Supply Power Ground in MEJ B5 Control Unit Power Supply 12V Switched Ignition Power In BETAS B6 Control Unit Power Supply 12V Switched Ignition Power m PETAS Br o oe o o _____f iti B8 Camshaft position sensor LH Vehicle Speed In PnPforCamsensor LH B9 Camshaft position sensor RH Cam In PnPforCamsensor RH d B10 Crankshaft position sensor Signal Crank n PEAS PB 5 S 1 jNotUsed d Biz GND Ignition System Power Ground n PEAS Bi3 Not sed 0 B4 Noted A Bis lgntonConros4 Coifo ut PnP forColl 5 B2. The ETC system continuously monitors itself for proper operation If a fault is detected then the system will be placed in a failsafe mode and power to the electronic throttle body will be turned off This will allow the engine to start and idle at approximately 1500 2000 rpm as a limp home mode but the throttle body will not respond to accelerator pedal inputs The system will continue to monitor itself and assume that the throttle blade will be in its rest position while in this un powered failsafe mode If it is detected that this is not the case then the system will enter a second failsafe stage whereby the crank signal to the EMS is interrupted The tachometer will drop to zero and the EMS will not fire fuel injectors or ignition coils If the engine is running it will coast to a stop If the engine is not running it will not start ETC Diagnostics The AEM EMS ETC system uses the CRUISE and SET indicator lights on the dashboard to display diagnostic information to the user The indicator lights flash in different ways for different purposes as described in the following sections CRUISE Figure 9 CRUISE and SET Indicator Lights as diagnostic outputs Boot Up When the ignition key is turned on and the EMS is powered up both of the CRUISE and SET indicator lights will flash briefly to signify the ETC system has booted up and that the indicator lights are functioning properly Fault Detected When the ETC system detects a fault t
3. e Ensure the accelerator pedal position sensor is in good condition and plugged in e Double check that APP sensor is wired per OEM specifications e Check all wiring for shorts or intermittent connections TPSA TPSB e Ensure the throttle position sensor is in good condition and plugged in e Double check that throttle body TPS sensor is wired per OEM specifications e Check all wiring for shorts or intermittent connections Target e Ensure throttle body bore is clean and free from obstruction e Ensure vehicle battery is in good condition and properly charged System Voltage e Ensure vehicle battery is in good condition and properly charged e Check all wiring for shorts or intermittent connections Motor Driver e Double check that throttle body TPS sensor is wired per OEM specifications e Check throttle body wiring for shorts or intermittent connections e Ensure EMS has not been installed in an area of extreme heat gt 120 C WDR e Contact AEM EMS Technical Support EEPROM e Perform ETC system calibration e Restore ETC system factory calibration e Contact AEM EMS Technical Support Page 15 of 20 Pinout Chart AEM 30 1820 30 1821 EMS These pins are used in the AEM supplied startup calibration They can be reconfigured by the end PnP user Available Not used by the startup calibration Modifications to the OEM wiring may be required before use Dedicated The location of these ed ust not be changed Ping
4. number Product must be received by AEM within 30 days of the date the RMA is issued Please note that before AEM can issue an RMA for any electronic product it is first necessary for the installer or end user to contact the tech line at 1 800 423 0046 to discuss the problem Most issues can be resolved over the phone Under no circumstances should a system be returned or a RMA requested before the above process transpires AEM will not be responsible for electronic products that are installed incorrectly installed in a non approved application misused or tampered with Any AEM electronics product can be returned for repair if it is out of the warranty period There is a minimum charge of 50 00 for inspection and diagnosis of AEM electronic parts Parts used in the repair of AEM electronic components will be extra AEM will provide an estimate of repairs and receive written or electronic authorization before repairs are made to the product Page 20 of 20
5. 32 31302928 3534 23532 315B80 28 l28 13534 33132 31 302828 3130 2028 27128 Connector Connector B Connector C Connector D Page 19 of 20 AEM Electronics Warranty Advanced Engine Management Inc warrants to the consumer that all AEM Electronics products will be free from defects in material and workmanship for a period of twelve months from date of the original purchase Products that fail within this 12 month warranty period will be repaired or replaced when determined by AEM that the product failed due to defects in material or workmanship This warranty is limited to the repair or replacement of the AEM part In no event shall this warranty exceed the original purchase price of the AEM part nor shall AEM be responsible for special incidental or consequential damages or cost incurred due to the failure of this product Warranty claims to AEM must be transportation prepaid and accompanied with dated proof of purchase This warranty applies only to the original purchaser of product and is non transferable All implied warranties shall be limited in duration to the said 12 month warranty period Improper use or installation accident abuse unauthorized repairs or alterations voids this warranty AEM disclaims any liability for consequential damages due to breach of any written or implied warranty on all products manufactured by AEM Warranty returns will only be accepted by AEM when accompanied by a valid Return Merchandise Authorization RMA
6. Injection Mode Sequenial Spare Low Side Driver LowSidef1 pin A24 Knock Sensors used 1 Check Engine Light _ Low Side 10 pin A17_ Lambda Sensors used 2 OEM C2 sensors not Spare High Side Driver High Side 2 pin A33 used by EMS Idle Motor Type _ None Electronic Throttle _ Spare Switch Input Switch amp 2 pin CO Main Relay Control Yes Spare Switch Input Switch amp 3 pinA1 Crank Pickup Type Magnetc Spare Switch Input Switch amp 4 pinD11 CrankTeeth Cycle 36 2 22 Spare Switch Input Switch amp 5 pin D13 Cam Pickup Type HallEffect A C Switch Input Switch 6 pin D16 D17 Cam Teeth Cycle 3 0 0 0 00 0 0 0 0 0 plo MAF Max 4 84V 308 Grams Sec MAF Min 0 70V 0 0 Grams Sec Subaru 2004 2005 2006 Model Year Differences Although there are very few differences between the 2004 and 2005 2006 models the ECUs are not interchangeable The 30 1820 EMS must be used in a 2004 vehicle and the 30 1821 EMS must be used in 2005 2006 vehicles Consult the pinout chart for further information Page 4 of 20 EMS Fuel Map Boost Fuel Correct Table The 30 1820 1821 maps provided utilize the Boost Fuel Correct Table to provide a 1 1 fuel compensation above atmospheric pressure In the startup calibration the Boost Fuel Correct Table is configured to
7. provide twice as much fuel when the manifold pressure is twice as high this should help simplify the tuning process for different boost levels Notice the values in the main Fuel Map do not change above 100 kPa 0 psi boost the fuel correction is being made by the Boost Fuel Correct Table Note the Boost Fuel Correct Table must be adjusted if a different map sensor is installed this is because the load breakpoints change The Boost Fuel Correct value should be 0 at 100 kPa 100 at 200 kPa 200 at 300 kPa etc Boost Fuel Correct table ioi xi rs Subaru MAF sensor Intake Air Temp sensor The MAF mass air flow sensor can be removed to help decrease intake air restriction as the base map uses the factory MAP sensor to determine engine load Please be aware that the IAT intake air temperature sensor is integrated into the factory MAF sensor If the factory MAF IAT sensor is removed you may wish to install an AEM IAT Sensor Kit P N 30 2010 which includes a sensor wire connector and aluminum weld in bung While the factory MAF sensor locates the IAT sensor upstream of the turbocharger inlet it may be preferable to install an IAT sensor downstream of the intercooler to accurately measure charge temperatures EMS DC Stepper Motor control Subaru Tumble Generator Valves There are two sets of Tumble Generator Valves TGV found on the intake manifold of the STI Each set of valves is driven by a DC
8. stepper motor and has a 0 5V feedback signal to monitor valve position The Motor 1 and Motor 2 Target tables are used to set the position of the valves valve position can be controlled based on various parameters such as throttle position vehicle speed engine RPM or engine load The parameters PR Press Voltage and Spare Temp Voltage display the current position of the valves When these parameters are near 0 Volts the valves are open and will allow maximum air flow When these parameters are near 5 Volts the valves are closed creating turbulence in the intake stream and restricting air flow The valves are always open in the AEM supplied startup calibrations Page 5 of 20 WARNING the EMS can be configured to control the left and right bank independently The engine will run very poorly if one set of TGVs is fully open while the other set is fully closed so please be sure that the Motor 1 and Motor 2 Target tables are both the same EMS Variable Valve Control Subaru AVCS The Variable Valve Control table in the EMS can be used to control the STI s AVCS system which is used to change the airflow characteristics of the engine by advancing the timing of the intake camshafts When adjusting the Valve 1 and Valve 2 map please be aware that 55 represents minimum camshaft advance and 0 represents maximum camshaft advance The VVC settings provided in the AEM startup calibration are the results of hours of dyno testing on a st
9. the initial calibration of the Electronic Throttle Control unit If the OEM steering wheel and or gauge cluster have been removed please temporarily re install them to calibrate the ETC unit or add switches and lights to the vehicle as shown 12V power Cruise Set Coast Cruise switch SR LED AEM EMS 15k C7 resistor cli A15 Red 12V power 104 fuse Black battery or chassis GND Red 12V power 104 fuse Black battery or chassis GND 12V power Set Y Y LED 15k resistor A16 Normally Open momentary switches EDs should be rated for at least 10 mA current Page 7 of 20 AEM Electronic Throttle Control System ETC The 30 1820 EMS incorporates an ETC system which controls the OEM electronic throttle body All components of this system unmodified and as delivered from the manufacturer are required for optimum and safe functionality of this system These components include but are not limited to wiring ETC relay accelerator pedal assembly and throttle body The EMS ETC control system incorporates multiple failsafe strategies such that in the event of a component failure the system will shut down the ETC system and if necessary the engine in a graceful manner It still remains the user s responsibility to ensure that all vehicle component and wiring systems are maintained to a level of workmanship consistent with industry standards Note As the EMS is in
10. 2 315830 28 28 356843233431 302828 3130 2028 27128 Connector Connector B Connector C Connector D Page 18 of 20 Pini 2004 STI 2 5L 2005 2006 STI 2 5L AEM EMS 30 1820 30 1821 VO Availability Notes D GND control systems Power Ground In PEESI D2 GND control systems Power Ground In SITO D3 Electronic Throttle control GND sensor Electronic Throttle Ground Out ETAS D4 Electronic Throttle control motor Electronic Throttle Motor Out ETC e C orm D5 Electronic Throttle control motor Electronic Throttle Motor Out DETECTEN D6 Electronic Throttle control Motor Power Electronic Throttle Power In PETACCHI D7 GND Injectors Power Ground In PEVAS ps Starter switch Matin Relay circuit Switch m PETAS po NeurmdPostonswich Noted 0 0 0 D10 Power Steering oil pressure switch Noted o D11 Rear Defogger switch Switch 4 In Available switch should connect to GND when closed D12 notused by stock ECU e JNotUsed Di3 BlowerFanswich Switch 5 In Available switch should connect to GND whenclosed D14 Test Mode Connector Ignition Switch _ Main Relay circuit Switch 1 Not Used D15 Ignition Switch Test Mode Connector Main Relay circuit Switch 1 in PETA
11. 2004 S71 25L 72005 2006 ST25L AEM EMS 3018201301821 VO Avaiabitity Notes A1 Clutch Switch Switeh 3 In JAvailable switch should connect to 12V when closed A2 Front Oxygen Sensor Heater Signal 2 Injector 5 Out Available can be used for additional injectors 1 5A max _ A3 Front Oxygen Sensor Heater Signal 1 Injector 6 Out Available can be used for additional injectors 1 5A max pa Noted PAS 0 0 0 0 0 0 P o NtUsd 8 0 0 A6 GND Front Oxygen A F Heater 2 Injector 7 Out Available can be used for additional injectors 1 5A max _ A8 Tumble Generator Valve RH close lde 6 Out PnP for TGV A9 Tumble Generator Valve RH ope Ides5 Ouw PnPforTGV Ato Tumble Generator Valve LH close lde 8 Ouw PnPforTGV A11 Tumble Generator Valve LH open lde 7 Out PnPfor TGV A12 Pressure control solenoid valve fuel tank LowSideDriver3 Out Available can be used for Switched Ground 1 5A max A3 QDranVave LowSideDriver2 Out Available can be used for Switched Ground 1 5A max A14 Purge Control solenoid valve LowSideDriverf4 Out Available can be used for Switched Ground 1 5A max A15 Main light Cruise lamp on dash Dedicated ETC system output A16 Cruise Set light Set lamp on dash Dedicated ETC system output A18 Oil flo
12. Installation Instructions for EMS P N 30 1820 2004 Subaru Impreza WRX STI and EMS P N 30 1821 2005 06 Subaru Impreza WRX STI 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 m 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 Street Unit A Hawthorne CA 90250 Phone 310 484 2322 Fax 310 484 0152 http www aempower com Instruction Part Number 10 1820 2008 Advanced Engine Management Inc Page 1 of 20 Congratulations You have just purchased the finest Engine Management System for your vehicle at any price The AEM Engine Management System EMS is the result of extensive development on a wide variety of vehicles Each system is engineered for a particular application The AEM EMS differs from all others in several way
13. S D16 ACSwitch MainRelayconto Switch 6 Main Relay circuit FM Dedicated activates main relay with switched GND D18 Not sed 0 0 00 0 0 0 0 0 0 Di9 Noted 0 0 00 0 0 0 0 0 0 0 0 0 D20 SSM GSTcommunia onine EGT 2 In Available RTD type thermistor 020 Noted 00 0 0 0 0 0 0 0 0 D22 Noted 0 0 0 0 0 0 0 0 0 0 0 0 0 RO ZNRNENENESE GNE IMG e HO EEUU ERREUR O D24 Blow byLeak diagnosis signal EGT 3 In AvalableRTDtypethermstr D25 Rear Oxygen sensor Signal Lambda 2 In Available O2 2signal O D26 Not sed 0 0 0 0 0 0 0 0 0 0 D27 Noted 00 000 0 00 00 D28 Fuel Pump control unit Signal2 Low Side Driver 5 Out Available can be used for Switched Ground 1 5A max poz 1 EGTf4 In Available RTD type thermistor oo 0 0 0 Notte d Out Boer Pin function is different between 2004 2005 2006 models Wire View Of AEM EMS els s Lennie 2 1 855 Thu bokeh 1716 1511411 241 110 9 8 AONB BMS 4Nsn2h iio a 8 1615114113121110 9 8 F zhepspapspa tto 9 8 PPA SAPS 22 2 20 19 18 2728 2524 23p221 20 272862524 2322 2120 19 184 7 2524 2322 2120 1918 34 33
14. S using AEM Pro Reference the AEM Pro user manual if you need help connecting b Edit the dle 6 vs Target table as in Figure 5 such that all breakpoints are at zero 0 percent c Edit Idle A C Load Comp and or Idle Extra 12 Volt Options as in Figure 6 to zero 0 percent d Verify that the EMS parameter Idle Position parameter is zero 0 percent e Perform the Throttle Setup procedure as described in the AEM Pro user manual f Restore the above Options to their original values to ensure proper idle control functionality S Idle vs Target table Graphical view 700 800 300 1000 1100 1200 1300 1400 1500 J0 1300 2000 300 00 2500 2 270 2800 2300 3000 Idle Invert Idle FB Dir Invert Hi dle Wait Time Idle FB Minimum ES Idle Off IF TP Over y Idle FB Maximum zx Idle On If TP Less z Idle FB Dead Band rpm Idle FB Above rpm Idle FB Dead Band rpm Idle FB Below rpm Idle FB Rate mS Idle AJC Load Comp 0 Z Idle Extra lt 12 Volt 0 00 p AFC On Delay 5 Boost ldle Pw TPS Idle Pw Frequency Idle Switch Input Figure 6 Temporarily set Idle A C Load Comp Hi Idle RPM Offset and Idle Extra 12 Volt to zero Page 10 of 20 Re calibrating the Electronic Throttle Control System ETC Calibration Once the ETC system calibration procedure has been performed it should not need to be re calibrated unless one or more of the following is true e The APP sensor TPS or thrott
15. Setup gt gt Advanced Setup gt gt Variable Valve Control gt gt VVC 1 and hold the engine around 3500 RPM Monitor the Cam 1 ADV parameter it should be the same as the VVC 1 Target parameter 40 degrees and the VVC 17 Error should be very small 1 max If the VVC 7 Error is greater than 1 or 1 adjust the Cam 1 Start option to decrease this error Repeat this process for the VVC 2 Template adjust the Cam 2 Start option as needed Select the entire Valve 2 table right click and Paste the original values back into the table Copy and paste these values into the Valve 1 table also Page 6 of 20 Wiring accessories to the EMS Please follow this suggested wiring diagram when adding accessories such as UEGO gauges or Air Temperature Sensors to the EMS Note that the AEM UEGO gauge s black wire should be tapped to the battery or chassis ground connecting the UEGO to the EMS ground pins without also wiring it to the battery or chassis may cause the UEGO and or EMS to malfunction AEM EMS 6 Lambda 1 AEM UEGO 30 4100 White 0 5V analog UEGO signal B1 GND D25 Lambda 2 AEM UEGO 30 4100 White 0 5V analog UEGO signal B4 ano C13 AIT 30 1820 C31 sensor GND Air Temperature Sensor 30 1821 30 2010 Subaru Cruise Control switches and indicator lights The OEM cruise control switches and lights are used to perform
16. UISE light after which the failure type will be flashed on the SET light These codes are listed in Table 2 and Table 3 The ETC system will remain un activated until the following boot up cycle i e key off then key on System APP TPSA TPSB Target System Voltage Motor Driver WDR INIA BR NM gt EEPROM c N A Table 2 System Fault Code Troubleshooting Calibration Faults Failure Type Out of Range Noise Disagreement General F2 N A N A INIo 5j o N gt N A o N A Table 3 Failure Type Fault Code A calibration fault will be reported if the Accelerator Pedal Position APP or Throttle Position Sensor TPS sensors are found to be outside of the specification limits Table 4 details the electrical limits for these Sensors Sensor Mechanical Position Voltage Limit VDC ini t ITUNES CUUMECI ini t muy mmm usos ini t IINE 0m ini t were nmm ide 145209 Table 4 Sensor Electrical Calibration Limits Page 14 of 20 A fault code of 5 RP Relay may be caused by a fouled throttle bore a malfunctioning or missing ETC relay or if the throttle body has mechanically failed Troubleshooting Operational Faults Should an operational fault be detected please read and follow the following suggestions for each system APP
17. ey it will not replace the need to tune the EMS for your specific application AEM startup calibrations are not intended to be driven aggressively before tuning We strongly recommend that every EMS be tuned by someone who is already familiar with the AEM software and has successfully tuned vehicles using an AEM EMS Most people make mistakes as part of the learning process be warned that using your vehicle as a learning platform can damage your engine your vehicle and your EMS Page 2 of 20 Please read and understand these instructions BEFORE attempting to install your EMS 1 Removing the Stock Engine Control Unit 2 3 a o am Access the stock Engine Control Unit ECU The location of the ECU on the WRX is underneath the right side floorboard A 10mm socket is required to remove the kick panel that covers the stock ECU 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 ECUs 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 Remove the fasteners securing the ECU to the car body and set them aside Do not destroy or discard the factory ECU as it can be reinsta
18. he CRUISE and SET indicator lights will flash in an alternating fashion to alert the user a fault has been detected This will happen in one of two situations 1 Calibration Fault A failed calibration will be detected if one of the sensors is found to be out of the expected range during the calibration procedure The indicator lights will flash in an alternating pattern to alert the user of this fault for a period of approximately twenty 20 seconds After this time period the CRUISE light will remain off and the SET indicator light will flash a fault code Please reference Table 1 for a description of the fault codes The system will flash the code repeatedly until the ignition is turned off Calibration Fault APP Minimum APP Maximum TPS Minimum TPS Maximum 5 RP Relay Table 1 System Fault Code ARIOOFKMN 2 Operational Fault When the system detects a fault during normal operation e g driving idling etc the indicator lights will repeatedly flash in an alternating pattern to alert the user of this fault until the ignition key is turned off Note that the ETC system will Page 13 of 20 not be functional and the EMS may disable engine operation during this mode depending on the severity of th e fault Once the ignition has been turned off and then on again the indicator lights will flash the fault code for the affected system The affected ETC system code will be first flashed on the CR
19. ie lgntonConro3 Coif3 jOutPPmPforCol 3 B19 Back up Power Supply Permanentzi2V n PETAS B20 Noted 0 0 0 0 0 0 0 Ba 0 0 0 0 Noted B22 Crankshaft position sensor Signal TimingGround Out PETAS 823 Noted 0000000000 B24 Radiator Fan relay 2 control LowSSide Driver 9 Out PnPfonA CFan B25 RadiatorFanrelayiconro Low Side Driver 8 Out PnP for Radiator Fan d Dedicated 0 5V signal to Fuel Pump Control Unit 828 S o y S osea B29 Noted 0 00 0 0 0 0 0 0 0 B30 0 0 NotUsed B31 Crankshaft Position sensor Shield Power Ground Out JERRY pBs2 fe Noted d B33 A Creayconro LowSideDrvers6 Out PnP for A C compressorclutch B4 0 0 Noted d B35 Electronic Throttle control motor relay ETCrelayconro Out PEAGE Pin function is different between 2004 2005 2006 models Wire View Of AEM EMS T 3 2 1 H T 6 5 4 3 1716151413121110 9 8 18418 1716151413 12 T rhehshafishzfhio 38 2 26250p4232221201 818 2726 2524 1817 25p4 232221201918 2928 2180 2928 27 26 34 33 3231302928 35 34 3332 Connector A Connector B Connector C Co
20. le body have been removed replaced or adjusted e The EMS has been removed and installed in a different vehicle e AEM Technical Support has requested it to be performed The following procedure describes the steps to re activate calibration mode on a system that has already been calibrated Activate Calibration Mode a Ensure the ignition key is in the OFF position b Press and HOLD both the CRUISE and SET COAST buttons Please note that the CRUISE button is activated by pressing the end of the Cruise Control Steering Column Stalk and the SET COAST button is activated by pulling the entire stalk downward as depicted in Figure 7 Both buttons must be depressed and held prior to moving on to the next step e A RES ACC GNE Y SET COAST J Figure 7 Pressing the SET COAST and CRUISE buttons c Turn the ignition key to the ON position d Keep holding both the CRUISE and SET COAST buttons for approximately ten 10 seconds until the CRUISE and SET indicator lights Figure 3 begin flashing in unison at a medium rate e Release the CRUISE and SET COAST buttons Calibration mode has now been activated Follow the steps in Electronic Throttle Control System Calibration Procedure Initial Calibration Procedure to complete the process Dh Page 11 of 20 EMS Idle Control Calibration The ETC idle control can be configured and calibrated via AEM Pro similarly to more traditional systems that use an idle air b
21. lled easily for street use and troubleshooting Installing the AEM Engine Management System Plug the factory wiring harness into the AEM EMS and position it so the wires are not pulled tight or stressed in any manner Secure the EMS with the provided Velcro fasteners Plug the comms cable into the EMS and into the PC not supplied Install the supplied AEM CD and open the AEMPro software Turn the ignition on but do not attempt to start the engine Go to ECU Send New Calibration Upload the base calibration file cal that most closely matches the vehicle s configuration to be tuned Full details of the test vehicle used to generate each map can be found in the Notes section in the Setup window of the AEMPro software The base maps can be found in the Subaru folder located in Wy Computer Local Disk C Program Files AEM AEMPro Startup Calibrations Calibrate the Electronic Throttle Control system by following the ETC Calibration procedure see page 8 9 Synchronize the ignition timing Select the Configure drop down menu then ECU Setup Set Ignition Use a timing light and compare the physical engine timing on cylinder 1 front right cylinder on the STI to the parameter gnition Timing displayed Use the Advance Retard buttons until the timing at the engine matches the timing parameter displayed in the EMS Ready to begin tuning the vehicle a Note This calib
22. n See Figure 4 for approximately three 3 seconds until the indicator lights stop flashing There will be a brief delay after which the CRUISE light will flash once Ensure the accelerator pedal is not being depressed and is in the full UP position The SET indicator light will flash rapidly for a few seconds as the EMS calibrates this position There will be a brief delay after which the CRUISE light will flash twice Depress and hold the accelerator pedal to the floor and ensure it is in the full Wide Open Throttle WOT position The SET indicator light will flash rapidly for a few seconds as the EMS calibrates this position There will be a brief delay after which the CRUISE light will flash three times The SET indicator light will flash rapidly for several seconds as the EMS calibrates the ETC throttle body If the calibration procedure was successful and all the ETC sensors and actuators are found to be within tolerance then the CRUISE and SET indicator lights will flash in unison at a medium rate If the calibration procedure fails indicated by the CRUISE and SET indicator lights flashing in an alternating pattern please reference the sections entitled ETC Diagnostics and Calibration Troubleshooting elsewhere in this document Turn the ignition key to the OFF position The ETC system is now calibrated and ready for use Figure 4 Pressing the CRUISE button Page 9 of 20 2 EMS Calibration a Connect to the EM
23. nnector D Pine 2004ST 25L 20052006 ST25L AEMEMS30 1820 30 1821 WO Avalability Notes e Noted e o em NbtUsad c7 Dedicated ETC system input c8 BrkeSwih2 Noted E c1o Resume Accelswich Noted Cit Set Coastswitth Set Switch In PEGEKLEESIN Out Dedicated reference power to accelerator pedal 16 Dedicated sensor reference power In Dedicated main 0 5V signal from accelerator pedal 18 Dedicated main 0 5V signal from throttle motor 9j 0 Noted 2 FullevlSenor J o e jJNetUsd 000000000 0 C21 Fuel Tank Pressure Sensor signal Noted S C22 C23 24 0 0 0 0 0 0 0 0 0 0 0 0 Noted o Dedicated Dedicated secondary 0 5V signal from accelerator pedal Dedicated secondary 0 5V signal from throttle motor c0 fe Not User C31 Dedicated C32 Dedicated Out TES 34 Dedicated ground to accelerator pedal C35 Out aS Wire View Of AEM EMS els s Lennie 2 1 6 4 TPB EIS FRENIS i1rd6 ln504n3421110 9 8 1ad8nrmem5n141332H1H0 9 8 1BN S431 211409 8 7 yhepsppspa tto 9 8 PPR SAPS 22 2 20 19 18 2728 2524 PAR 2 20 2728562524 2322 2120 19 184 7 2524 2322 2120 1918 3433 3231302928 3534 243
24. ock 2004 STI and should be a good starting point Other setups may respond differently so the startup calibration may not contain the ideal VVC settings for vehicles that have been modified WARNING The Subaru engine has a right and left camshaft and the EMS is able to control each of them independently It is very important that the VVC 1 and VVC 2 tables options and error control settings are set to the same value for every load and RPM point If the left and right camshaft targets or control schemes are not the same the resulting oil pressure fluctuation to the AVCS solenoids may make it difficult to accurately control camshaft angle and the engine may run poorly Initial VVC Calibration The Cam 1 Start and Cam 2 Start options may be different from each other and may not be the same for every vehicle VVC calibration should be performed once the EMS has been tuned well enough that the engine idles smoothly and can safely be taken to redline in neutral With the engine idling open the Valve 1 map select the entire map right click with the mouse and choose Copy to save the table values to the clipboard Highlight the columns from 2500 RPM up to 5000 RPM press the M key to open the right click menu and then press the S key for set value Inthe dialog box that appears type 40 and press Enter Open the Valve 2 map and repeat this process setting the map to 40 from 2500 5000 RPM Open the VVC 1 Template
25. ration needs to be properly tuned and is not recommended for street use NEVER TUNE THE VEHICLE WHILE DRIVING Page 3 of 20 Application Notes for EMS P N 30 1820 30 1821 Make Subaru Transmissions Offered Impreza WRX STI Trans Supported Years Covered 2004 30 1820 EMS Drive Options AWD vsco aosa goto oe Engine Displacement 25L 1 Supplied Connectors Engine Configuration Flat4 Spare Injector Drivers ____ Inj 5 pin A2 Firing Order 1 3 2 4 Spare Injector Drivers Inj amp 6 pinA3 liad Load Sensor Type MAP or MAF Spare Injector Drivers lInj amp 8 pinA7 MAP Min 08v 14 7 PSig_ Spare Coil Drivers MAP Max 459V Q23 8PSlg Boost Solenoid PW 2 pin A32 _ i EGT 1 Location PinCi2 EGT 2 Location PinD20 ils with i EGT 3 Location PinD24 Ignition driver type 0 5VLogic EGT 4Loceto PinD20 m 4 How to hook up a CDI Remove OEM coils Spare 0 5V Channels N A S C or T C Turbocharged Spare Injector Drivers Inj 7 pin A6 4 with internal igniters Factory Injectors 500cc minSaturated _ _ Spare Low Side Driver _ Low Side 3 pin A12 Factory Inj Resistors No Spare Low Side Driver Low Side 4 pinA14
26. s The EMS is a stand alone which completely replaces the factory ECU and features unique plug and play technology There is no need to modify the factory wiring harness and in most cases the vehicle may be returned to stock in a matter of minutes The AEMPro software is configured to work with the factory sensors and equipment so there is no need for expensive or hard to find sensors making replacements and repairs as simple as with any stock vehicle For stock and slightly modified vehicles the AEMPro software can be programmed with base parameters providing a solid starting point for beginner tuning For more heavily modified cars the EMS has many spare inputs and outputs allowing the elimination of add on rev limiters boost controllers nitrous controllers fuel computers etc It also includes a configurable onboard data logger that can record any 16 EMS parameters at up to 250 samples per second Every EMS comes with all functions installed and activated there is no need to purchase options or upgrades to unlock the full potential of your unit Please visit the AEM EMS Tech Forum at http www aempower com and register We always post the most current strategy release PC Software and base calibrations online On the forum you will find and share many helpful hints tips to make your EMS perform its best TUNING NOTES AND WARNING While the supplied startup calibration may be a good starting point and can save considerable time and mon
27. stalled and functional to ensure optimum and safe performance of the ETC system e The CRUISE and SET COAST buttons and the CRUISE and SET dashboard indicator lights are an integral part of the ETC system calibration and diagnostic functions It is therefore not recommended that these buttons and lights be completely removed from the vehicle such as could be the case with a purpose built race vehicle Page 8 of 20 Electronic Throttle Control System Calibration Procedure The 30 1820 30 1821 EMS as delivered requires a specific calibration procedure to be performed prior to use Before beginning this procedure please be familiar with the location and function of the CRUISE and SET COAST buttons on the Cruise Control Steering Column Stalk as depicted in Figure 2 Also be aware of the green CRUISE and SET indicator lights on the dashboard Figure 3 This procedure should be repeated any time any part of the ETC system has been serviced removed or replaced Note Do not attempt to start or run the engine during the calibration procedure The EMS will disable engine start running whilst in calibration mode CRUISE Figure 2 CRUISE and SET COAST buttons Figure 3 CRUISE and SET indicator lights 1 Initial Calibration Procedure a o7 90o0 p Pus P Turn the ignition key to the ON position The CRUISE and SET indicator lights will begin flashing in unison at a medium rate Press and hold the CRUISE butto
28. tended for use on vehicles that are to be operated off road only the factory cruise control system will be non operational after installation of the EMS Installation Information The 30 1820 AEM EMS was designed to work with the vehicle its components and wiring as delivered from the manufacturer If any of the components or wiring have been changed or if the drive line from the original vehicle has been placed in another vehicle such in a custom race application then the user should take heed of the following notes e A mechanical Wide Open Throttle WOT accelerator pedal travel stop is installed in the floor and or carpet of the vehicle as delivered from the manufacturer If this stop is removed for any reason such as removing the carpet for use in a race vehicle the user must ensure that a stop of some sort is fabricated and installed This stop must be fabricated such that there is a minimum clearance of 0 250 inches between the accelerator pedal mounting bracket and the accelerator pedal actuating rod when the pedal is at WOT See Figure 1 ja A 0 25 Min Figure 1 Minimum Pedal to Bracket Clearance e The ETC system incorporates several safety failsafe strategies and components that rely on the system to be installed as delivered from the manufacturer to operate properly These components include but are not limited to wiring ETC relay accelerator pedal assembly and throttle body All the original components must be in
29. w control solenoid RH Signal Dedicated A19 Oil flow control solenoid LH Signal 12V Switched Ignition Power Out REAIS A20 Noted 0 0 0 0 0 O A25 Noted 00 0 0 0 0 0 0 0 0 A22 Alematr LowSideDrver amp i Out Available can be used for Switched Ground 1 5A max A23 Engine Speed Output to OEM tachometer Tach Output LS7 Out PnPforTachometer A24 Fuel Tank sensor control valve Low Side Driver 11_ Out Availlable can be used for Switched Ground 1 5A max A25 Front Oxygen sensor shied Noted A26 FrontOxygensensorsignal Lambda 1 In PnPforO2sisigna paz Noted S O A28 Oil flow control solenoid RH Signal Injector 9 Out PnP for VVC 4_ Active Valve Control Solenoid A29 Oil flow control solenoid LH Signal Injector 10 Out PnP for VVC 2 Active Valve Control Solenoid A30 fe JNtUsed 0 0 0 0 0 0 0 0 0 0 0 631100 0 0 0 0 0 0 0 0 0 0 0 0 0 Noted S O A32 WastegateControlsolenodvave PW 2 Out PnP for Boost Control Solenoid 1 A33 Front Oxygen sensor signal High Side Driver 2 Out Available can be used for Switched 12V 1 5A max A34 EngneGrud PowerGround In EE Wire View Of AEM EMS
30. ypass valve There are a few calibration options that are set specifically to allow proper ETC idle control and must not be changed from the values set forth in the 30 1820 startup calibration The options highlighted in red in Figure 8 must remain set as depicted for predictable ETC idle control The other options that are not highlighted have been set up for stable idle control in the 30 1820 startup calibration but are however available for adjustment as the calibrator sees fit E Options Idle Hi Idle Car Speed Hi Idle RPM Offset Hi Idle Wait Time Idle Off IF TP Over Idle On If TP Less Idle FB Above rpm Idle FB Below rpm Idle 4 C Load Comp A D On Delay 5 dle Invert Idle FB Dir Invert Idle FB Minimum Idle FB Maximur Idle FB Dead Band rpm IdeFBDeadBand rpm Idle FB Rate NEN mS IdleExta lt 12Volt Boost ldle P TPS Idle Pw Frequency Idle Switch Input Idle Stepper Clock Idle Low Amp Step Idle 7 8 Stepper DC Idle 5 6 Stepper DC W Idle 172 Max Curen 11 5 Amp Idle 3 4 Max Curen 11 5 Amp Idle 5 6 Max Curren fr 50 Amp Idle 7 8 Max Curren 5 50 Amp Idle Step 1 2 Idle Step 3 4 5 Idle Step 5 6 lv Idle Step 7 8 iv E Idle Brown Out Trig 10 00 Volts Idle Max Step Figure 8 Parameters highlighted in red must be set as depicted for predictable ETC Idle Control Page 12 of 20 ETC Fault Management
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