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Ma in Men u
Uti lit y F unc tio ns
Veh icl e S ele cti on
Pre ssu re Tes t Lea k D own Te st
Run Ne w T est
Vie w T est Re sul ts
Upl oad Te st
Res ult s
Con fir m V eh
Sel ect ion
Dra in Tes ter
Upd ate Te ste r
Vie w V ehi cle In fo
Inj ect or Loc ato r
Inj ect or Tes t
New Ve h
Sel ect ion
Cle ar Veh
Sel ect ion
KENT-MOORESPX
POWER
Fuel Management Unit
KENT-MOORESPX
ENTERCANCEL
DOWN
ON / OFF
UP
KENT-MOORESPX
POWER
Fuel Management Unit
KENT-MOOR ESPX
ENTERCANCEL
DOWN
ON / OFF
UP
KE N T-M OOR ESP X
KENT-MOO RESPX
POWER
Fuel Management Unit
KENT-MOO RESPX
ENTERCANCEL
DOWN
ON / OFF
UP
QUICK REFERENCE GUIDE
Plea se make sure to carefully read thi s and t he User Guid e before you beg in to use th e tester.
AFIT—Active Fuel Injector Tester FMU—Fuel Management Unit
DLC—Diagnostic Link Connector MCU—Main Control Unit
—Testing—
1. Connect the tester to
the vehicle
• DLC Connection
• Direct Connection
2. Hang the FMU vertically from
the vehicle’s hood
3. Connect the MCU to power
• 12V power adapter
• Battery hookup
4. Insert the drain hose into an
approved fuel container
(min. 16 oz.)
5. Turn the MCU on
6. Press ENTER to continue to Vehicle
Selection
7. Select a vehicle
8. Select a test
• Injector Test
• Pressure Test
• Leak Down Test
9. View the test results
• On-screen
• Upload to a computer
—DLC Connection—
Used with most vehicles, this connection controls the injectors and the fuel
pump through the DLC. Use this hookup when using the vehicle’s diagnostic
link for injector control. This connection does n ot require the use of the
injector harness.
IMPOR TANT
Hang the FMU vertica lly
from v ehicle’s hoo d
1. Connect the 10’ serial cable to the MCU and the DLC adapter.
2. Connect the DLC adapter to the vehicle’s OBDII connector.
3. Connect the Fuel Schrader Connector to the vehicle’s fuel rail at the fuel
test port.
—Direct Injector Connection—
This connection directly controls the injectors from the MCU. The fuel pump is
controlled through the DLC connector. Use this hookup when testing vehicles
that do not suppor t diagnostic link injector control. You must the use the
injector harness with this connection. However, do not connect the injector
harness until instructed to by AFIT.
IMPORTANT
If t he engine is hot, or after cl eaning the injec tors, make sure you allow for
a coo l down period bef ore you begin test ing. A h ot soake d engine condition
may affec t the test re sults.
—Connecting the Tester to Power—
Power
Interc onnect
Cable
10’ Serial
Cable
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 to power. Note: If using the
alligator clips make sure to connect the red clip to the batter y’s positive (+)
terminal, a nd the black clip to the nega tive (–) terminal.
Main Control Unit
DLC Ada pter
(MCU)
Drain Hose
Hanger
Fuel Manageme nt
Unit (FMU)
Fuel Schrader
Connector
CH-47 976-60
When needed, u se with
exist ing SPX Kent-Moore
J-Cab les to c onnect t he MCU
to th e vehicle’s i njectors
1. Connect the 10’ serial cable to the MCU and the DLC adapter.
2. Connect the DLC adapter to the vehicle’s OBDII connector.
3. Connect the Fuel Schrader Connector to the vehicle’s fuel rail at the fuel
test port.
4. Connect the injector harness (or J-Cable adapter and cable, depending
on vehicle) to the MCU and the vehicle’s injectors. IMPORTANT! Do not
perform this step until instruc ted to by AFIT (the unit will prompt for the
correct injector harness or J-Cable adapter and cable).
Note: To correctly match test results to the i njector, always use the injector
locator function on a d irect connection hookup.
When usin g the option al kits for older GM an d other manufacturers’
vehicles, direc t hookup to the fuel pump circuit may be required. See the
AFIT User Guide for detail s.
CH -47 976 -14
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—Viewing Test Results on AFIT—
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You can view the results of the last completed test by navigating to, and
selecting, View Test Results. Press UP and DOWN to scroll through the
following results:
• Injector Balance Graph • Injector Balance Table
• Injector Flow Graph • Injector Flow Table
• Vehicle Information
DLC co nnections results are disp layed as Injector 1, 2, 3 etc. corresponding
to engine cylind er numbers. Direc t connection results are displa yed as
Inje ctor A, B, C etc. and the Injector Lo cator should be u sed to match the
resul ts to the in jector.
IMPORTANT!
Results from test to test on the same engine can vary by+/-3%. Small
test to test result variations should not be a source of concern. Consult the
Service Information/Shop Manual for information on test results that should
be of concern.
—Uploading Test Data to the Shop Computer—
Before you begin, make sure the software is installed on the computer. Also,
if you need to use the USB serial por t adapter, make sure to install the USB
serial port adapter software driver included on the AFIT CD.
Main Control Unit (MCU)
—Viewing Results on the Shop Computer—
After uploading test data to the shop computer, you can view the results
of any saved test by navigating to, and selecting, Customer/Vehicle Info
Search. Select the line for the customer or vehicle you wish to view. By
default, the most recent upload is displayed.
DLC co nnection results are displ ayed as Injector 1, 2, 3 e tc. corre sponding to
engi ne cylinder numb ers. Direct connectio n result s are di splayed as Inje ctor
A, B, C etc. and the Injector Lo cator function s hould be use d to ma tch the
resul ts to the in jector.
Note: The AFIT P C appli cation stores only t wo test data re cords for each
customer info reco rd—Balance 1/ Flow 1 and Balance 2/Flow 2.
The first set of test results upload ed to a custo mer reco rd are displayed
in t he BALANCE 1/FLOW 1 graph an d table. The second set of test results
uplo aded are displa yed in t he BALANCE 2/FLOW 2 graph an d table.
Additiona l uploa ds to th at customer record will overwr ite the BALANCE
2/FLOW 2 data.
TIP: To store add itional test results, c reate a new customer record
for that particul ar custo mer.
—Draining the FMU—
CAUTION!
It is recommended th at you drain the f uel Manageme nt Unit after each us e
to avoid h azardous situations.
• D o not over tighten the fuel fi lter
• D o not loosen the filter to drain the Fuel M anagement Un it
USB Seria l
Port Adapter
To elec trical outlet
To compu ter’ serial port
(or U SB seria l port adapter)
1. Connect the MCU to the computer.
2. Turn the MCU on.
3. Star t the AFIT PC application.
4. Select ADD NEW, or EDIT existing customer/vehicle information.
5. Click Load Injector Data in the AFIT PC application.
IMPORTANT! Make sure the MCU is p owered on before selecting
6. On the MCU navigate to, and select Upload Test Results. Once AFIT
completes the upload, the unit returns to the Main menu and the AFIT PC
application displays the data.
7. In the AFIT PC application, click SAVE to retain information, or CANCEL to
discard. Retained customer records may be printed at anytime.
—Replacing the Fuel Schrader Connector Seal—
Replace th e seal whenever it becom es
damaged, d eformed, fails to seal, or leaks.
1. Using a flat head screw driver, or
similar objec t, gently pry the old
seal out of the connector.
2. Discard the old seal and install a new seal.
For technical assistance or to order service parts, contact:
1-800-GM-TOOLS (1-800-468-6657)
Fuel Manageme nt Unit (FMU)
TIP: Slowly turning the FM U
Drain Hose
Interc onnect Cable
upsi de down and the n right
side up drain s the f uel fas ter.
(To MCU )
Note: To compl ete 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. Dra ining Tester is displayed. To stop
draining and return to the Main menu, selec t Cancel.
—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.
©2 006 Hi ckok In c. All rig hts re ser ved. Pr int ed in t he Uni ted St ates
19 120 -86 6
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