A’PEX SUPER AIRFLOW CONVERTER SUPER AIRFLOW CONVERTER INSTRUCTION MANUAL Thank you for purchasing the A’PEX Super Airflow Converter. Please read through this Instruction Manual to operate this product correctly and keep it near the product so that you may refer to it whenever necessary. If you transfer the product to another customer, be sure to attach this Instruction Manual and the warranty to the product.
Contents Chapter 1 Introduction Safety Precautions _____________________________________________________________________ 4 Features of this Product _______________________________________________________________ 6 Names and Functions of Parts ________________________________________________________ 8 Parts list ............................................................................................................... 8 Names of parts .....................................................................
Chapter 1 Introduction Safety Precautions ____________________________________ 4 Features of this Product ____________________________ 6 Names and Functions of Parts _____________________ 8 Parts list...........................................................8 Names of parts ................................................9 Meanings of operation symbols appearing in this document ........................................................
Safety Precautions ■Explanation of indications Indication Please read “Safety Precautions” carefully to operate the product with safety. Keep the Instruction Manual in hand and refer to it whenever needed. The Instruction Manual describes the items that you must observe to operate the product without giving any injury to you, other people and damage to property. The meanings of pictorial indications (signal words) are as shown on right.
！ WARNING ●The driver must not operate this product during driving This may interfere with driving operations, resulting in an accident. ●Mount this product securely. Do not install it in an unstable place that may interfere with driving This may interfere with driving, resulting in an accident. ●When installing the product, remove the negative terminal of the battery beforehand A fire may be caused by short circuit or electric parts may be damaged or burnt out.
Features of this product The SUPER AFC II is a fuel adjustment controller in which the airflow sensor signal or the pressure sensor signal can be modified in a 12 point RPM range by 1% increments to increase/decrease fuel in a range of +50% to –50%. The RPM to be corrected can be optionally set in 200 RPM increments, and corrections can be made according to throttle opening amounts.
■Storing two patterns of setting data in the memory Two patterns of setting data including air correction factor, throttle opening, air correction engine revolution speed, deceleration air upper limit, etc, can be stored in the memory. There are two files that can be stored in the memory. The setting data can be selected in an instant according to each driving stage such as circuit driving, town driving, and winding driving. When driving on the same stage, two patterns of setting data can be compared.
Names and Functions of Parts ■Parts list Before installing this product, be sure to check the parts list to confirm that there are not any foreign or missing parts. If any difference is found between the actual parts and the parts list, please contact the dealer of purchase. 2.Instruction manual(Operation part) 1.Main unit 3.Wiring diagram by model 4.Operation transition diagram 1volume 1sheet SUPER AIRFLOW CONVERTER 1unit 1volume (this document) 5.Warranty 6.Signal harness 1sheet 9.
■Names of parts Optical sensor (CDS sensor) VFD display section SUPER AIRFLOW CONVERTER 4-direction switch with a center pushbutton Rotary switch ■Meanings of operation symbols appearing in this document ※Press the upper part of the center switch ※Press the lower part of the center switch ※Press the left part of the center switch ※Press the right part of the center switch ※Press the center pushbutton ※Turn the rotary switch counterclockwise or clockwise When the rotary switch is turned clockwise,
第２章 Chapter 2 Initial Setup Procedure before Using This Product _____ 12 Perform initial setup ___________________ 13 Setting the sensor type and sensor number 13 Setting the number of cylinders ................... 13 Checking the throttle sensor voltage ............ 13 Setting the throttle sensor type .................... 13 Learning the throttle opening ....................... 13 Correcting the knocking signal .....................
Procedure before Using This Product Install this product The details of the installation procedure are described in the separate “Vehicle Specific Wiring Diagram.” Install the product securely referring to the “Vehicle Specific Wiring Diagram” in a separate document. Turn on the ignition switch Make sure that any abnormal noise or offensive smell is not produced from the SAFC II and the Vehicle. Perform initial setup Perform initial setup securely by referring to page 13.
Perform initial setup To operate this product, you must set several items during initial setup. After making sure that the SAFC II is securely installed, turn on the ignition switch and select the ETC. (etc. mode) in the main menu. Table of initial setup items １．Setting the sensor type and sensor number (P.44 [Sensor Type]) Select Sensor Type and set the sensor type and sensor number For vehicles equipped with a hot wire sensor, set the sensor output calculation method. ２．Setting the number of cylinders (P.
Chapter 3 Outline of Operating Method Outline of Functions and Operating Method ____16 What to be performed in the monitor mode _____18 What to be performed in the setting mode ______19 What to be performed in the etc.
Outline of Functions and Operating Method Main menu Monitor mode The data obtained from the sensor is displayed The airflow usage ratio, intake pressure, Karman sensor frequency, throttle opening, engine RPM, air correction factor, knocking level, and battery voltage are displayed. The SAFCⅡ consists mainly of 3 menus; Setting mode This mode is used for the user to perform settings The air correction factor, throttle open ing, air correction, engine RPM, and the upper limit for deceleration air is set.
■[Channel 1 to Channel 4] display items 1. Afl ........................Airflow (Hot wire/Flap) usage ratio 2. Prs ..................... Intake pressure 3. Kar.......................Karman sensor frequency 4. Thr ..................... Throttle opening 5. Rev .................... Engine RPM 6. Cor ..................... Air correction factor 7. Knk .................... Knocking level 8. Bat ..................... Battery voltage ■Rev.
Main menu 【Monitor】 Functions and Operations in the monitor mode 【One of items 1 to 4 is selected and displayed】 P22．【Monitor】→【1Channel】∼【4Channel】 [Contents of items] 1. Afl ..................Airflow (Hot wire/Flap) usage ratio 2. Prs................ Intake pressure 3. Kar ............... Karman sensor frequency 4. Thr................ Throttle opening 5. Rev............... Engine RPM 6. Cor ............... Air correction factor 7. Knk............... Knocking level 8. Bat .................
Main menu 【Setting】 Functions and Operations in the setting mode 1. Hi-Thrtl .................................................................................................... P30 Air correction factor setting (throttle opening, large) 2. Lo-Thrtl .................................................................................................... P30 Air correction factor setting (throttle opening, small) 3. TH-Point ........................................................................................
Chapter 4 Monitor Mode One of items 1 to 4 is selected and displayed _________________________22 A plot display is made by using the RPM for the axis ______________________27 21
【Monitor Menu】→【1Channel】∼【4Channel】 Channel Select Of the following 8 items, one of channels 1 to 4 is selected and displayed. A numeric display, analog display, graphic display, and digital/analog display are available as the display method. A pause is also available in each display (except the digital/analog display). In the numeric display, analog display and digital display, peak hold can be performed. In the graphic display, replay (*) can be performed.
＝ ３. ※When the upper part of the center switch is pressed, the operation is the same as when the rotary switch is turned clockwise. When the lower part of the center switch is pressed, the operation is the same as when the rotary switch is turned Counterclockwise. Go back Select the data to be display in the item selection menu or Pr ■When selecting [1 Channel] (1) Select a display item Operate the upper part or lower part of the switch in the display item selection mode to select a display item.
※Hold down the lower part of the center switch to display the air correction factor (P30) setting screen. Hold down the lower part of the center switch on the air correction factor setting screen to go back to the monitor display. ４.
※The following figure shows an example when [1 Channel] is selected. ●Function at graphic display ■Replay function Restart ●Ordinary display Temporary stop Replay start (Rightward scroll) Rightward scroll Reset Memory start Leftward scroll Pause Rightward scroll Restart Temporary stop ■Memory function Leftward scroll Memory stop ■Pause Remaining time Reset The memory time is as follows 【1Channel】 ...... 60sec 【2Channel】 ...... 30sec 【3Channel】 ...... 20sec 【4Channel】 ......
●Function in the digital/analog display ※In the digital/analog display, a 4 channel display is made regardless of the selected channel. The display items are fixed to the 4 items: engine RPM, throttle opening, knocking level, and air correction factor.
【Monitor Menu】→【Rev.-[Y]】 A plot display is made by using the RPM for the axis １. ２. Select [Monitor] in the main menu Select Go back Select [Rev. –[Y]] in the monitor menu or Select Enter Pr Enter or or Main menu Monitor menu Nx Go back ３. Select the data to be displayed in the item selection menu Select or ４. Pr Enter The selected item is displayed in the item selection menu Go back Pr ※Press the center pushbutton.
Chapter 5 Setting Mode Air correction factor setting (Throttle opening, large) ___________________________________ 30 Air correction factor setting (Throttle opening, small) ___________________________________ 30 Throttle opening setting ________________________ 32 Air correction engine RPM setting___________ 34 Deceleration air upper limit setting __________ 36 Knocking signal correction ____________________ 38 Data file ____________________________________________ 40 29
【Setting Menu】→【Hi-Thrtl】・【Lo-Thrtl】 Air correction factor setting (Throttle opening, large / small) In the SAFCⅡ, the input airflow signal is converted into an air volume value and this value is corrected by the air correction factor. As an output signal, the corrected air volume value is converted back into an airflow signal and then this signal is output to the electronic control unit (ECU).
※When the upper part of the center switch is held down on the air correction factor setting screen, the set correction value is put into the flat (correction) status. The set value is returned to the initial status by holding down the upper part of the same switch once again. 3. The air correction factor setting mode is set Go back Pr Ordinary display image diagram The ordinary display setting screen is as shown in the above image diagram. The actual display is shown in the lower left figure.
【Setting Menu】→【TH-Point】 Throttle opening setting １. Select [Setting] in the main menu ２. Select [TH-Point] in the setting menu Select Select Go back or Pr Main menu Enter Setting menu or 3. The throttle opening setting mode is set Select ■Setting range Nx or Go back or Pr (1) Select the throttle opening Lo/Hi Operate the left/right part of the center switch to select the throttle opening Lo or Hi. The Increase/decrease selected numeric value is displayed as a reversing display.
Correction factor change due to throttle opening setting. When the throttle opening is set to Lo-10% and Hi-50%, the air correction factor at a throttle opening of 40% is as follows; ● At a throttle opening of 50% or more, the air correction factor is equal to “Correction factor set at Hi-Thrt +3%” ● At a throttle opening of 10% or less, the air correction factor is equal to “Correction factor set at Lo-Thrt -1%” Air correction factor at a throttle opening of 40% Correction value +3% 0.25 +2% 0.
【Setting Menu】→【Ne-Point】 Air correction engine RPM setting １. Select [Setting] in the main menu ２. Select [Ne-Point] in the setting menu Select Go back Select or Pr Main menu Enter Setting menu Enter 3.
(1) Select an engine RPM point Press the upper or lower part of the center switch or turn the rotary switch counterclockwise or clockwise to select an engine RPM point. The selected item is displayed as a reversing display. When the rotary switch is turned clockwise, the cursor is moved upward. When this switch is turned counterclockwise, the cursor is moved downward. (2) Set the engine RPM Select an engine revolution point and press the right part of the center switch to set the engine RPM.
【Setting Menu】→【Dec.-Air】 Deceleration air upper limit setting In the case of a turbo vehicle equipped with a hot wire type airflow sensor, the engine may be stalled by blow-back when the throttle is released. In this case, engine stall can be prevented by using the deceleration air upper limit setting. With the deceleration air upper limit setting, an upper limit is given to the airflow output voltage at the engine RPM set at Ne01 and Ne02 (Ne01 and Ne02 of Ne-Point) below the “Thr” throttle opening. １.
(1) Select a throttle opening and an engine RPM Press the upper or lower part of the center switch or turn the rotary switch counterclockwise or clockwise to select an engine RPM point. The selected item is displayed as a reversing display. When the rotary switch is turned clockwise, the cursor is moved upward. When this switch is turned counterclockwise, the cursor is moved downward. (2) Set a numeric value Select each item and press the right part of the center switch.
【Setting Menu】→【Knk Set】 Knocking signal correction Setting is performed to convert a signal obtained from the knock sensor into a knocking level. Corrections are made in the 2 point RPM area for slight knocking signal variation due to different knocking sensor manufacturers, vehicle models, or due to an individual difference within the same model. This step is indispensable for initial setup. ※Note ･･･When setting this item, do not perform idling on a general public road. １.
Setting Knk Set １. Correct RPM 1 ２. ３. (Example) Hold the engine RPM at a fixed value between 1300 rpm and 1700 rpm in the no-load status (neutral). (In the example shown on the right, it is held at 1600 rpm.) After the RPM becomes stable, press the right part of the center switch. At completion of correction, Increase the RPM the data on RPM and knocking sensor is recorded. to the specified (In the example shown on the right, they are 1680 rpm RPM area and 27, respectively.
【Setting Menu】→【Data File】 Data file １. Select [Setting] in the main menu ２. Select [Data File] in the setting menu Select Go back Select or Pr Main menu Enter or 3. Setting menu Enter Nx or Go back The data file control mode is set or Select or Changeover NOTE ●Both File 1 and File 2 cannot be turned on or off simultaneously.
(1) Select a data file Press the upper or lower part of the center switch and turn the rotary switch counterclockwise or clockwise to select a data file. The selected item is displayed as a reversing display. When the rotary switch is turned clockwise, the cursor is moved upward. When this switch is turned counterclockwise, the cursor is moved downward. (2) Change over the data file between ON and OFF Select each item and press the right part of the center switch.
Chapter 6 Etceteras (etc.
【etc.】→【Sensor Type】 Sensor type and sensor number setting The sensor type and the sensor number (sensor characteristic) are set according to the vehicle. This item is indispensable for initial setup. １. ２. Select [etc.] in the main menu Select [Sensor Type] in the etc. menu Go back Select Select or Pr Main menu Select Decide or 3. or Nx etc.
４. Set the sensor number Go back or Pr ●When the sensor type is set to Hot-Wire or Pressure (1) Select In/Out Operate the left or right part of the center switch to Increase/ select In or Out. The selected numeric value is decrease displayed as a reversing display. (2) Set the sensor number Select a numeric value and press the upper or lower part of the center switch or turn the rotary switch counterclockwise or clockwise to increase or Select decrease the numeric value.
５. Go back Set the sensor output calculation method Select or Pr (1) Select In or Out Operate the left or right part of the center switch to select In or Out. The selected numeric value is Changeover displayed as a reversing display. (2) Set the calculation method Select a numeric value and press the upper or lower part of the center switch or turn the rotary switch counterclockwise or clockwise to select a or calculation method.
Setting the sensor output calculation method (1) ●General vehicles (Usually, this setting is performed.) When the product is used with an airflow sensor and an ECU with single airflow sensor control. ※Because of a single engine control unit input ※Because of a single airflow sensor In 1 Measured air volume 10 SUPER AIRFLOW CONVERTER Input air volume 10 Out 1 Output air volume 10 ECU ※In this case, the airflow sensor measures an air volume of 10.
Setting the sensor output calculation method (3) ●General vehicles using 2 airflow sensors When the product is used with two airflow sensors and an ECU with single airflow sensor control. ※Because of 2 airflow sensors In 2 SUPER AIRFLOW CONVERTER Out Add ※Because of a single engine control unit input, the measured air volume of the 2 airflow sensors is added (Add) and its result is output.
●When the sensor type is Flap or Karman 1. For Flap (1) Set the sensor number Press the upper or lower part of the center switch or turn the rotary switch counterclockwise Increase/decrease or clockwise to increase or decrease the numeric value. When the rotary switch is turned clockwise, the numeric value is increased. When this switch is turned counterclockwise, the numeric value is decreased.
【etc.】→【Car Select】 Number-of-cylinders and throttle sensor type setting Set the number of cylinders and the throttle type according the vehicle. This item is indispensable for initial setup. １. ２. Select [etc.] in the main menu Select [Car Select] in the etc. menu Select Select Go back or Pr Main menu Decide Decide or or etc. menu 3.
(3) Select the throttle sensor type Press the upper or lower part of the center switch or turn the rotary switch counterclockwise or clockwise to select the throttle sensor type (Thr). The selected item is displayed as a reversing display. (4) Set the throttle sensor type Select an item and press the upper or lower part of the center switch or turn the rotary switch counterclockwise or clockwise to change the direction of the arrow (sensor type).
【etc.】→【Sensor chk】 Sensor check The airflow sensor voltage, pressure sensor voltage, throttle sensor voltage, and knocking sensor output value are checked. After wiring, each connection can be checked for normality and each sensor status can be checked. When setting the throttle sensor type on the previous page, it is necessary to check the throttle sensor voltage.
【etc.】→【Disp Scale】 Display scale setting A graphic display and a analog display in the monitor mode are made and a graph scale in the two-dimensional trace mode is set. As a pressure display, one of kg/cm2 and kPa can be selected. １. ２. Select [etc.] in the main menu Select [Disp Scale] in the etc. mode Select Select Go back or Pr Main menu Decide Decide or 3. or etc.
【etc.】→【Warning Set】 Warning setting Regarding the airflow using ratio, suction tube pressure, Karman swirl sensor frequency, knocking, or engine revolution speed, the indicator blinks to give a warning to the driver when the indicated value exceeds the set warning value. １. ２. Select [etc.] in the main menu Select [Warning Set] in the etc. menu Go back Select Select or Pr Main menu Decide Decide Nx or or etc. menu 3.
(1) Select an item Press the upper or lower part of the center switch and turn the rotary switch counterclockwise or clockwise to select an item to set a numeric value. The selected item is displayed as a reversing display. When the rotary switch is turned clockwise, the cursor is moved upward. When this switch is turned counterclockwise, the cursor is moved downward. (2) Set a numeric value Select a numeric value and press the right part of the center to set the numeric value.
【etc.】→【Pass Lock】 Password setting and change When a password is optionally set, this can prevent setup data or setting data from being changed by disoperation or mischief. １. ２. Select [etc.] in the main menu Select [Pass Lock] in the etc. menu Go back Select Select or Pr Main menu Decide Decide or or Nx etc. menu 3.
●When selecting Lock Nx Decide (1) Input the password Turn the rotary switch counterclockwise or clockwise and input a password. For the password, select characters from 0 to 9 and A to Z. Operate the left or right part of the center switch to shift a digit. (In the initial status, the password is 0000.) After inputting the password, press the center pushbutton and select [Nx] in the popup menu. To abort it, select [Pr] or [Tp] in the popup menu to exit from the mode.
【etc.】→【VFD Bright】 VFD brightness adjustment In this product, the VFD brightness is automatically adjusted according to the outside lightness by using a built-in optical sensor. It is supposed that the item [Day] is for the brightness of the daytime (bright time), [Dim] is for the brightness of the evening time (dim time), and [Nig] is for the brightness of the nighttime (dark time) Make an adjustment, for example, when the light is dazzling at night. Usually, any change is not required. １. ２.
【etc.】→【Program Ver.】 Program version check １. ２. Select [etc.] in the main menu Select [Program Ver] in the etc. menu Go back Select Select or Pr Decide Main menu or or Nx etc. menu 3. Go back The program version check mode is set or Pr ●The program version information is displayed. End the check Select [Pr] in the popup menu after pressing the center pushbutton or press the left part of the center switch, and the etc. menu will reappear.
【etc.】→【Initialize】 All data initialization Initialize all data to return it to the data status provided at delivery from the factory. １. ２. Select [etc.] in the main menu Select [Initialize] in the etc. menu Go back Select Select or Pr Main menu Decide Decide or Nx or etc. menu 3.
●Memo 61
What to do in such a case ? Fault related to the power supply ●Check if the battery is connected. ●Check if the vehicle ECU harness is securely connected to the signal harness. ●Check if the signal harness is connected to the connector of the SAFC main unit cable. Even if the connection is properly made, the power supply may not be turned on because of a contact defect. Check the plug and splice caulking portion once again. ●The power supply is turned off because of vibrations.
The engine is out of order ●An engine stall occurs. ・Check if the harness is connected to a wrong position. Install the harness by referring to the “Wiring diagram by model” attached to this product, taking special care about the direction of the ECU, and checking the connector shape and the number of pins. ・Check if the sensor type is wrongly set. ●Idling is unstable. ・Check if the harness is securely connected. ・Check if the sensor type is wrongly set. ●The engine check lamp comes on.
Notes 1. The contents of this document are subject to change without previous notice. 2. The contents of this document have been prepared with extreme care. However, if you find a doubt, error, or other fault, inform us of it. 3. A part or all of this document may not be reproduced in any form without prior written permission, and also may not used without the prior written permission of A’PEX CO., LTD. under the copyright except for private use. 4.
