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36

Utilities

Active Fuel Injector Tester User Guide

Draining the FMU

  CAUTION!

It is recommended that you drain the fuel Management Unit after  
each use to avoid hazardous situations.
•  Do not over tighten the fuel filter
•  Do not loosen the filter to drain the Fuel Management Unit

Note:  To complete this procedure, the FMU must be connected to the MCU before you begin.

1.  Disconnect the FMU from the vehicle’s 

fuel rail.

2.  Navigate to and select 

Drain Tester

. 

Follow the on-screen instructions:

•  Place drain hose in approved 

container.

• Select 

Continue

 to start draining. 

Draining Tester

 is displayed. To stop 

draining and return to the Main 
menu, select 

Cancel

.

Main Menu

Utility Functions 

Vehicle Selection

Pressure Test

Leak Down Test

Drain Tester

Update Tester

View Vehicle Info

Injector Locator

Injector Test

Fu

el M

an

ag

em

en

t U

nit

POW

ER

Drain hose

Interconnect Cable 

(To MCU)

TIP:  Slowly turning 

the FMU upside 

down and then right 

side up drains the 

fuel faster.

Summary of Contents for CH-47976

Page 1: ...User Guide CH 47976 CH 47976 11 Rev A 02491 049 Rev A 02491 049 Rev A US Patent No 5 020 362 AFIT User Guide B W 300 dpi 14 x 8 5 J Dzuroff 08 08 18 ...

Page 2: ...User Guide ...

Page 3: ... this equipment by untrained or unauthorized persons Printed in the United States of America Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and or other countries Adobe Acrobat and Adobe Reader are registered trademarks or trademarks of Adobe Systems in the United States and or other countries All other brand and product names are...

Page 4: ...ters 10 Software Installation 11 Step 1 Verify Requirements 12 Operating System Requirements 12 Hardware Requirements 12 BeforeYou Begin 12 Step 2 Download Install AFIT Update Utility Program 13 Download the update utility 13 If you are installing the update utility from a download 14 Optional Software 15 To Install Adobe Reader 15 ToView the User Guide or Quick Reference Guide 15 Hookup 17 Step 1...

Page 5: ...esults 29 Viewing Results on AFIT 30 UploadingTest Data to a Shop Computer 31 Step 1 Connect the Main Control Unit to the Computer 31 Step 2 Upload the Data to the Shop Computer 32 Step 3 Viewing theTest Results on the AFIT PC Application 33 Utilities 35 Draining the FMU 36 Updating the Database 37 Locating an Injector 38 Maintenance 39 Replacing the Fuel Filter 40 Procedure 40 Adjusting the Contr...

Page 6: ...he manuals provided by the manufacturer or the vehicle or equipment being tested or used for all information and testing procedures whenever diagnosing repairing or operating such vehicle or equipment Failure to follow the instructions cautions and warnings provided here as well as those provided by the vehicle and equipment manufacturers can result in fire explosion bodily injury and property dam...

Page 7: ... area immediately and change any clothes that have become wet with fuel Always wear appropriate protective glasses when testing the pressure of the fuel system or gas caps Should fuel get into eyes flush eyes immediately with water and consult your physician Follow all federal state and local regulation for the safe storage and use of the compressed nitrogen gas used or stored at site Vehicles emi...

Page 8: ... leak free connections Check all equipment connections before during and after testing Do not pinch or kink tubing Secure hose clamps when using hose adapters Before connecting fuel lines and hose fittings apply a few drops of clean engine oil to male ends to ensure proper connection with female connectors Tug firmly on quick connect fittings to check for proper connection Make sure the safety cat...

Page 9: ...ood working condition This tester is a precision instrument keep it clean and repair or replace any damaged parts This includes Fuel injection parts for signs of wear O ring seal retainers at the FMU FAH connections for signs of wear make sure the connection is tight Glass housing at the FMU FAH connection for chips or cracks especially at the edges ...

Page 10: ...AFIT Be sure you familiarize yourself with all of the equipment and procedures before conducting any tests For your reference the following is a list of acronyms used throughout this guide AFIT Active Fuel Injector Tester DLC Diagnostic Link Connector FAH Fuel Access Hose FMU Fuel Management Unit FPEA Fuel Pump Electrical Access MCU Main Control Unit ...

Page 11: ...ment Unit FMU AFIT Unit and Accessories 1 Main Control Unit MCU 7 USB to Serial Port Adapter 5 DLC Adapter 6 2 6 Serial Cables 3 AFIT PC Application Software 8 Power Adapter 9 12V Power Cord 10 12 V Power Cord 11 Cable A Injector Harness 12 J Tool Cable Adapter 4 Fuel Schrader Connector Seal Replacement Kit 13 Cable B Injector Harness ...

Page 12: ... 13 5 DLC Adapter CH 47976 4a 6 2 6 Serial Cables CH 47976 10 7 USB to Serial Port Adapter CH 47976 3a 8 Power Adapter alligator clips CH 47976 7 9 12V Power Cord CH 47976 6 10 12V Power Cord wall outlet CH 47976 8 11 Cable A Injector Harness CH 47976 50 12 J Tool Cable Adapter CH 47976 60 13 Cable B Injector Harness CH 47976 55 User Guide not shown CH 47976 11 Carrying Case not shown CH 47976 12 ...

Page 13: ...the MCU for power and communication connections Injectors Port connect the 24 pin end of the injector harness or J Cable adapter to this port when testing on vehicles without DLC injector control PWR Port connect the selected power cord 12V adapter or wall outlet adapter here to provide power to the unit FMU Port connect the interconnect cable from the FMU to this port to provide power to the FMU ...

Page 14: ...e to capture drained fuel Make sure to use a container approved for collecting fuel Interconnect Cable connect to the MCU to provide power to the FMU and to send and receive test signals Sight Glass with Replaceable Filter use to visually monitor the fuel flow and to examine the fuel for contamination Fuel Access Hose FAH use to connect the FMU directly to the vehicle s fuel test port Fu el Manage...

Page 15: ... a USB port on your computer Will require installing driver software located on the AFIT CD DLC Adapter use along with the 9 pin serial cable and the Serial to OBDII Cable to connect to the vehicle s OBDII connector Serial to OBDII Cable connect to the DCL Adapter and then to the vehicle s OBDII connector Power Cords use the 12V power adapter to supply power to the MCU when testing the vehicle Onl...

Page 16: ...IT for the first time you will need to install the AFIT PC Application Software and depending on your computer the USB to Serial Port software driver This section defines the computer requirements and how to install the software on to your computer Software Installation ...

Page 17: ...nimum 100 MB free hard disk space Minimum 1 GB of RAM CD ROM drive Available serial port or USB port or USB port Requires using the USB to Serial Port Adapter when connecting to the computer s USB port For SIDI Engines CH 47976 500 Adapter Kit includes DMU and 2 cables Note Add Duramax Engine coverage with CH 47976 505 2 cables For Duramax Diesel Engines CH 47976 510 Adapter Kit includes DMU and 2...

Page 18: ...Account 4 Click Change User Account Control Settings 5 Make a note of your current settings and then slide the setting s bar to Never Notify 6 Click OK and then close the Control Panel 7 Restart your computer Step 2 Download Install AFIT Update Utility Program Download the update utility 1 Shut down any applications that you may have running on your computer except for your internet browser 2 If y...

Page 19: ... OPEN or RUN varies depending on browser and operating system Note for some browsers you may only be prompted to save the file If this is the case save the file to your desktop and then double click the file to run it If a security warning is displayed asking if your are sure you want to run the software click RUN or install varies depending on browser and operating system If a security warning is...

Page 20: ...is software a copy is included on the AFIT CD or you can download it from Adobe s web site at www adobe com To Install Adobe Reader 1 Insert the AFIT CD in to the CD ROM drive 2 Choose RUN from the Start menu 3 Choose Browse 4 In the browse box select your CD ROM drive 5 Open the Adobe folder and double click AdbeRdr705_enu_distrib exe 6 Follow the on screen instructions to complete the installati...

Page 21: ...16 Software Installation Active Fuel InjectorTester User Guide ...

Page 22: ...is section describes and illustrates the various hookup procedures Several options are available to complete the basic hookup Use this section along with the vehicle s Service Information Shop Manual or equivalent to complete the hookup for your vehicle ...

Page 23: ...does not require the use of an injector harness Procedure 1 Connect one serial cable to the MCU and the DLC adapter 2 Connect the DLC adapter to the Serial to OBDII cable 3 Connect the Serial to OBDII cable to the vehicle s OBDII connector 4 Connect the Fuel Schrader Connector to the vehicle s fuel rail at the fuel test port 5 Insert the drain hose into an approved fuel storage container POWER Fue...

Page 24: ...l to OBDII cable to the vehicle s OBDII connector 4 Connect the Fuel Schrader Connector to the vehicle s fuel rail at the fuel test port 5 Connect the injector harness or J Cable Adapter and J Cable to the MCU and the vehicle s injectors IMPORTANT Do not perform this step until instructed to AFIT will prompt for the correct injector harness 6 Insert the drain hose into an approved fuel storage con...

Page 25: ...l rail and when instructed by AFIT connect the FPEA cable to the fuel pump relay socket IMPORTANT Do not perform this step until instructed to AFIT will prompt for the cable 3 Connect the injector harness to the MCU and the vehicles injectors IMPORTANT Do not perform this step until instructed to AFIT will prompt for the correct injector harness 4 Insert the drain hose into an approved fuel storag...

Page 26: ...nit ENTER CANCEL DOWN ON OFF UP Power Interconnect Cable Hanger Fuel Management Unit FMU Main Control Unit MCU Drain Hose Fuel Schrader Connector Procedure 1 Make sure the vehicle s ignition key is in the OFF position 2 Connect the interconnect cable from the FMU to the MCU 3 Connect the power cord to the MCU and then connect to power Note If using the alligator clips make sure to connect the red ...

Page 27: ...l InjectorTester User Guide Adjusting the Hanger 1 Unhook the bungee cord from the open end of the clip 2 Slide the hook along the bungee cord to the desired position 3 Reattach the bungee cord to the open end of the clip ...

Page 28: ...res and the screens you will use to navigate to the tests Injector Test tests the fuel injector flow characteristics Pressure Test tests the fuel system pressure Leak Down Test pressurizes the fuel system and allows a leak down test to the vehicle s Service Information Shop Manual specifications ...

Page 29: ... test screen If AFIT displays CHECK FUSE unplug the fuel pump cable if attached If still displaying CHECK FUSE check the fuse inside the rear compartment on the MCU If AFIT indicates FMU NOT Connected connect the FMU If AFIT s database dbase verify displays FAIL you will need to restore it using the AFIT PC Application software If the vehicle s battery is below 10 5 volts AFIT flashes LOW BATTERY ...

Page 30: ...near the bottom of the Vehicle Selection screen New Veh Selection go to this screen to select a new vehicle From this screen you are typically prompted to select the following vehicle information Vehicle model year Vehicle manufacturer Vehicle model Vehicle body VIN code Vehicle engine size Vehicle engine VIN code Note If the vehicle you are testing is not listed in the database you will need to t...

Page 31: ... direct connection methods no vehicle can be selected Make sure to clear any selected vehicle before proceeding From the Vehicle Selection screen select the following Clear Veh Selection Clears the currently selected vehicle information IMPORTANT Only use this for vehicles not available in the AFIT database Main Menu Utility Functions Vehicle Selection Pressure Test Leak Down Test Confirm Veh Sele...

Page 32: ...selected however they will basically follow these steps 1 Start the vehicle and run at idle until instructed by AFIT to turn the engine off This will take approximately one to two minutes 2 Turn the key to the ON position but do not start the vehicle AFIT begins the test After a 30 second Leak DownTest AFIT instructs you to connect the injector harness cable or J Cable Adapter and cable and if req...

Page 33: ...reading and the minimum maximum pressures since the last time the ENTER key was pressed Use the keypad during the pressure test to do the following UP to freeze the current screen ENTER to reset the min max CANCEL to exit stop the test and return to the main menu Leak Down Test This test provides you with the following information Current fuel pressure The time since the fuel pump was last run aft...

Page 34: ...ta on the MCU or uploading the results to the shop computer and viewing the data with the AFIT PC Application Note DLC connections results are displayed as Injector 1 2 3 etc corresponding to engine cylinder numbers Direct connection results are displayed as Injector A B C etc and the AFIT Injector Locator function page 36 should be used to match the results to the injector ...

Page 35: ...ent of average flow of injectors this screen shows the flow of each injector relative to the other injectors in a table format Injector Flow Graph displayed in unit flow per second UF s this screen shows the unit flow of each injector in a bar graph format This value is an indicator of the actual flow of the individual injectors for this vehicle Injector Flow Table displayed in unit flow per secon...

Page 36: ... for download you may but not required disconnect the FMU DLC adapter injector harness if used and FPEA cable if used from the MCU 1 Connect a serial cable to the MCU and to the computer Note If the computer does not have an available serial port connect the USB adapter to the serial cable and connect to an available USB port on the computer 2 Use vehicle power or connect the wall outlet adapter t...

Page 37: ...r each customer info record Balance 1 Flow 1 and Balance 2 Flow 2 The first set of test results uploaded to a customer record are displayed in the BALANCE 1 FLOW 1 graph and table The second set of test results uploaded are displayed in the BALANCE 2 FLOW 2 graph and table Additional uploads to that customer record will overwrite the BALANCE 2 FLOW 2 data TIP To store additional test results creat...

Page 38: ... the vehicle s Service Information Shop Manual for servicing procedures Balance 1 Balance 2 Tables displayed to the left and right of the balance graphs in a percent of average flow of injectors Flow Rate 1 Flow Rate 2 Graphs displayed in unit flow per second UF s this screen shows the unit flow of each injector in a bar graph format This value is an indicator of the actual flow of the individual ...

Page 39: ...34 ViewingTest Results Active Fuel InjectorTester User Guide This page intentionally left blank ...

Page 40: ...6 35 Active Fuel InjectorTester User Guide Utilities This section explains the AFIT utility functions Drain Tester Update Tester Injector Locator View Vehicle Info ...

Page 41: ...he FMU from the vehicle s fuel rail 2 Navigate to and select Drain Tester Follow the on screen instructions Place drain hose in approved container Select Continue to start draining Draining Tester is displayed To stop draining and return to the Main menu select Cancel Main Menu Utility Functions Vehicle Selection Pressure Test Leak Down Test Drain Tester Update Tester View Vehicle Info Injector Lo...

Page 42: ...he computer Note If the computer does not have an available serial port connect the USB adapter to the serial cable and connect to an available USB port on the computer 2 Use vehicle power or connect the wall outlet adapter to the MCU and plug into an electrical outlet 3 Turn the MCU on and start the AFIT PC application if not already running 4 On the MCU navigate to and select Update Tester 5 Sel...

Page 43: ...ts screen The selected injector is buzzed for easy identification 1 While still connected to the injectors select INJECTOR LOCATOR AFIT displays an information screen 2 Press ENTER to move to Injector Selector screen and select the injector 3 Press ENTER to start buzzing the injector Press ENTER again to stop buzzing the injector Main Menu Utility Functions Vehicle Selection Pressure Test Leak Dow...

Page 44: ...ter User Guide Periodically AFIT may require maintenance such as changing a fuse or a filter or you may need to uninstall the AFIT PC Application software from the shop computer This section describes those procedures Maintenance ...

Page 45: ...d shoulder fitting securely to the fuel filter 7 Replace the glass IMPORTANT If removed make sure the O rings are in place 8 Replace the filter end cap 9 After the O ring contacts the glass housing turn the filter end cap one full turn 12 15 inch pounds torque IMPORTANT Make sure the glass housing is not offset from the o rings and do not over tighten the fuel filter Also make sure to check the gl...

Page 46: ...he back panel Replacing the Injector Fuel Pump Fuse This fuse is only used to protect the fuel injectors and fuel pump and does not interrupt power for the remainder of the circuitry of the MCU Access the fuse from the back of the control unit The fuse is an 8 amp fast blow AGC 8 fuse Procedure 1 Unscrew the back panel of the control unit 2 Locate the fuse 3 Carefully remove the old fuse from the ...

Page 47: ...pplication Software 1 Delete the AFIT desktop shortcut if any 2 Choose Settings from the Start menu 3 Select Control Panel from the displayed menu 4 Double click Add or Remove Programs 5 Select Active Fuel Injector Tester from the list 6 Click Change Remove 7 When asked if you are sure you want to remove the program click Yes to start the uninstall Note If a dialog box is displayed asking if you w...

Page 48: ...njectorTester User Guide For technical assistance or to order service parts contact 1 800 GM TOOLS 1 800 468 6657 Contact Information Important Make sure to drain ALL fuel from the unit s before returning for servicing ...

Page 49: ...cidental or consequential damages including lost profit whether based on warranty contract tort or any other legal theory The existence of a defect shall be determined by Bosch in accordance with procedures established by Bosch No one is authorized to make any statement or representation altering the terms of this warranty DISCLAIMER THE ABOVE WARRANTY IS IN LIEU OF ANY OTHER WARRANTY EXPRESS OR I...

Page 50: ...User Guide CH 47976 CH 47976 11 Rev A 02491 049 Rev A 02491 049 Rev A US Patent No 5 020 362 AFIT User Guide B W 300 dpi 14 x 8 5 J Dzuroff 08 08 18 ...

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