CanOBD2&1 Scan Tool - Sears

Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - CYLINDER BALANCE TEST
5. Turn off all vehicle accessories, then turn ignition key OFF and wait
for the on screen prompt. If you wish to exit the Cylinder Balance
test at this time, press the ENTER/LD
6. When instructed by the message on the
CanOBD2&1 Scan Tool's display, start
the engine and press the ENTER/LD
button. A "One moment please
preparation for test is in progress..."
message shows temporarily on the
CanOBD2&1 Scan Tool's display.
7. When prompted by the CanOBD2&1
Scan Tool, lightly press the accelerator
pedal half way and release to activate
the cylinder balance test.
For 1986 models ONLY: Fully
button.
press
release.
accelerator once and
� A “One moment please test is in
progress...” message shows on the CanOBD2&1 Scan Tool’s
display.
� The computer is now in Cylinder Balance Test mode, and will
start cutting fuel to each cylinder in sequence to determine if all
the cylinders are contributing equally. It may take up to five
minutes before the test results are transmitted to the
CanOBD2&1 Scan Tool.
8. If the vehicle's computer fails to enter Cylinder Balance Test mode,
do the following:
� Lightly press the accelerator pedal again as described in step 7
above.
� Check your vehicle's fuel injection system and make sure that it
is a Sequential Electronic Fuel Injection (SEFI) system. This test
is applicable only to SEFI or SFI systems.
9. After the Cylinder Balance Test is
completed, the test results are sent to
the CanOBD2&1 Scan Tool.
� The computer compares the power
contribution that each cylinder
makes to engine operation.
10. If all cylinders are contributing equally,
the computer determines that power
distribution is normal and a “System
Pass” message will display.
90 CanOBD2&1