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A’PEX SUPER AFCⅡ Instruction Manual

Super airflow converter
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A'PEX 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.
Product name
Product code
Applicable car models
Application
SUPER
AIRFLOW CONVERTER
SUPER AFC‡ U
401-A911 / 401-A913
Car models mentioned in the wiring diagram by model
Airflow / pressure sensor signal adjustment
A'PEX Chasing Our Dreams - A complete line of customized car and
automotive parts developed with state of the art technology and new
ideas. Our company is A'PEX which means the highest in quality.
SUPER
AIRFLOW CONVERTER
A'PEX CO., LTD

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  • Page 1 If you transfer the product to another customer, be sure to attach this Instruction Manual and the warranty to the product. SUPER AFC‡ U Product name Product code 401-A911 / 401-A913 Applicable car models Car models mentioned in the wiring diagram by model...

  • Page 2: Table Of Contents

    Contents Chapter 1 Introduction _____________________________________________________ _____ Safety Precautions __________________________________________________ Features of this Product ______________________________________________ Names and Functions of Parts Parts list ....................... 8 Names of parts ....................9 Meanings of operation symbols appearing in this document ......... 9 Chapter 2 Initial Setup __________________________________________ Procedure before Using This Product _____________________________________________________...

  • Page 3: Chapter 1 Introduction

    Chapter 1 Introduction Safety Precautions ___________________________________ Features of this Product ____________________________ Names and Functions of Parts _____________________ Parts list............8 Names of parts ..........9 Meanings of operation symbols appearing in this document ............9...

  • Page 4: Safety Precautions

    Safety Precautions • ¡ Explanation of indications Indication Meaning This indicates the existence of Please read “Safety Precau- potential hazard that will result WARNING tions” carefully to operate • I in death or serious injury of the the product with safety. operator or a third person if the product is wrongly operated in Keep the Instruction Manual...
  • Page 5 WARNING • I • œ The driver must not operate this product during driving This may interfere with driving operations, resulting in an accident. • œ 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.

  • Page 6: Features Of This Product

    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.
  • Page 7 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.

  • Page 8: Names And Functions Of Parts

    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 .

  • Page 9: Names Of Parts

    • ¡ Names of parts Optical sensor VFD display section (CDS sensor) 4-direction switch with SUPER AIRFLOW CONVERTER a center pushbutton Rotary switch Meanings of operation symbols appearing in this document • ¡ • ¦ Press the lower part of the •...

  • Page 11: Chapter 2 Initial Setup

    Initial Setup Chapter 2 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 .....13...

  • Page 12: Procedure Before Using This Product

    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.

  • Page 13: Setting The Sensor Type And Sensor Number • Y Sensor Type• Z

    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 ‚...
  • Page 15 Chapter 3 Outline of Operating Method Outline of Functions and Operating Method ____ 16 What to be performed in the monitor mode _____ What to be performed in the setting mode ______ What to be performed in the etc. mode _________...

  • Page 16: Outline Of Functions And Operating Method

    Outline of Functions Monitor mode The data obtained from the sensor is and Operating Method displayed The airflow usage ratio, intake pres- sure, Karman sensor frequency, throttle opening, engine RPM, air correction factor, knocking level, and battery voltage are Main menu displayed.
  • Page 17 [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.

  • Page 18: Functions And Operations In Monitor Mode

    Main menu • y Monitor • z Functions and Operations in the monitor mode • y One of items 1 to 4 is selected and displayed• z P22• D • y Monitor• z • ¨ • y 1Channel• z • ` • y 4Channel•...

  • Page 19: Functions And Operations In The Setting Mode

    Main menu • y Setting • z Functions and Operations in the setting mode 1. Hi-Thrtl ....................Air correction factor setting (throttle opening, large) 2. Lo-Thrtl ....................Air correction factor setting (throttle opening, small) 3. TH-Point ....................Throttle opening setting 4.
  • Page 21 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...

  • Page 22: Channel Select • Y 1Channel • Z • ` • Y 4Channel• Z

    • y Monitor Menu• z • ¨ • y 1Channel • z • ` • y 4Channel • z 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.
  • Page 23 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.
  • Page 24 • ¦ 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. ‚...
  • Page 25 • ¦ The following figure shows an example Function at graphic display when [1 Channel] is selected. Replay function • ¡ Restart Ordinary display • œ Temporary stop Replay start (Rightward scroll) Rightward scroll Reset Leftward scroll Memory start Pause Rightward scroll Restart Temporary stop...
  • Page 26 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. Peak display •...

  • Page 27: A Plot Display Is Made By Using The Rpm For The Axis. • Y Rev.-[Y]• Z

    • y Monitor Menu• z • ¨ • y Rev.-[Y]• z A plot display is made by using the RPM for the axis ‚ P ‚ Q Go back Select [Monitor] in the Select [Rev. –[Y]] in main menu the monitor menu Select Select Enter...
  • Page 29 Chapter 5 Setting Mode Air correction factor setting (Throttle opening, large) ___________________________________ Air correction factor setting (Throttle opening, small) ___________________________________ Throttle opening setting ________________________ Air correction engine RPM setting___________ Deceleration air upper limit setting __________ Knocking signal correction ____________________ Data file _________________________________________...

  • Page 30: Air Correction Factor Setting (Throttle Opening, Large) • Y Hi-Thrtl• Z

    • y Setting Menu • z • ¨ • y Hi-Thrtl • z • E • y Lo-Thrtl • z Air correction factor setting (Throttle opening, large / small) In the SAFC‡ U , the input airflow signal is converted into an air volume value and this value is corrected by the air correction factor.
  • Page 31 • ¦ 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. The air correction factor setting mode is set Go back Ordinary display image diagram...

  • Page 32: Throttle Opening Setting • Y Th-Point• Z

    • y Setting Menu • z • ¨ • y TH-Point • z Throttle opening setting ‚ P ‚ Q Select [Setting] in the Select [TH-Point] in the main menu setting menu Select Select Go back Main menu Enter Enter Setting menu Go back The throttle opening setting mode is set...
  • Page 33 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; • œ At a throttle opening of 50% or more, the air correction factor is equal to “Correction factor set at Hi-Thrt +3%”...

  • Page 34: Air Correction Engine Rpm Setting • Y Ne-Point• Z

    • y Setting Menu • z • ¨ • y Ne-Point • z Air correction engine RPM setting ‚ P ‚ Q Select [Setting] in the Select [Ne-Point] in the main menu setting menu Go back Select Select Enter Main menu Enter Setting menu Go back...
  • Page 35 Select an engine RPM point Press the upper or lower part of the center switch or turn the rotary switch counter- clockwise 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.

  • Page 36: Deceleration Air Upper Limit Setting • Y Dec.-Air• Z

    • y Setting Menu • z • ¨ • y Dec.-Air • z 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.
  • Page 37 Select a throttle opening and an engine RPM Press the upper or lower part of the center switch or turn the rotary switch counter- clockwise 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.

  • Page 38: Knocking Signal Correction • Y Knk Set• Z

    • y Setting Menu • z • ¨ • y Knk Set • z 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.
  • Page 39 Setting Knk Set Correct RPM 1 ‚ P . (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.

  • Page 40: Data File • Y Data File• Z

    • y Setting Menu • z • ¨ • y Data File • z Data file ‚ P ‚ Q Select [Setting] in the Select [Data File] in the main menu setting menu Go back Select Select Main menu Enter Enter Setting menu Go back...
  • Page 41 (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.
  • Page 43 Chapter 6 Etceteras (etc.) Mode Sensor type and sensor number setting __ 44 Number-of-cylinders and throttle sensor type setting_______________________________________ Sensor check _____________________________________ Display scale setting_____________________________ Warning setting ___________________________________ Password setting and change_________________ VFD brightness adjustment ____________________ Program version check _________________________ All data initialization______________________________ What to do in such a case?____________________...

  • Page 44: Sensor Type And Sensor Number Setting • Y Sensor Type• Z

    • y etc. • z • ¨ • y Sensor Type • z 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. ‚...
  • Page 45 ‚ S . Set the sensor number Go back • œ 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.
  • Page 46 ‚ T . Go back Set the sensor output calculation method (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...
  • Page 47 Setting the sensor output calculation method (1) • œ 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 •...
  • Page 48 Setting the sensor output calculation method (3) • œ 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 a single engine control •...
  • Page 49 • œ When the sensor type is Flap or Karman (1) Set the sensor number 1. For Flap 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.

  • Page 50: Number-Of-Cylinders And Throttle Sensor Type Setting • Y Car Select• Z

    • y etc. • z • ¨ • y Car Select • z 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. ‚ P ‚...
  • Page 51 (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...

  • Page 52: Sensor Check • Y Sensor Chk• Z

    • y etc. • z • ¨ • y Sensor chk • z 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.

  • Page 53: Display Scale Setting • Y Disp Scale• Z

    • y etc. • z • ¨ • y Disp Scale • z 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/cm and kPa can ‚...

  • Page 54: Warning Setting • Y Waning Set• Z

    • y etc. • z • ¨ • y Warning Set • z 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.
  • Page 55 (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.

  • Page 56: Password Setting And Change • Y Pass Lock• Z

    • y etc. • z • ¨ • y Pass Lock • z 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. ‚ P ‚...
  • Page 57 • œ When selecting Lock 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.

  • Page 58: Vfd Brightness Adjustment • Y Vfd Bright• Z

    • y etc. • z • ¨ • y VFD Bright • z 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.

  • Page 59: Program Version Check • Y Program Ver.• Z

    • y etc. • z • ¨ • y Program Ver. • z Program version check ‚ Q ‚ P Select [etc.] in the Select [Program Ver] in the main menu etc. menu Go back Select Select Decide Main menu etc.

  • Page 60: All Data Initialization • Y Initialize• Z

    • y etc. • z • ¨ • y Initialize • z All data initialization Initialize all data to return it to the data status provided at delivery from the factory. ‚ Q ‚ P Select [etc.] in the Select [Initialize] in the main menu etc.
  • Page 61 Memo...

  • Page 62: Troubleshooting

    What to do in such a case ? Fault related to Check if the battery is connected. the power supply • œ Check if the vehicle ECU harness is securely connected to the signal harness. • œ Check if the signal harness is connected to the connector of the SAFC main unit cable.
  • Page 63 The engine is out • œ An engine stall occurs. of order • E 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.
  • Page 64 Notes The contents of this document are subject to change without previous notice. 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. 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.

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