Retrieving codes – Equus 3145 - Digital Ford Code Reader (1981 - 1995) User Manual
Page 42
Retrieving Codes
ADDITIONAL TESTS FOR EEC-IV SYSTEMS
39
Chapter 4
Relay and Solenoid Test (Output State Check)
The "Output State Check " is a special program in the vehicle's
computer that allows the user to energize (turn ON) and de-
energize (turn OFF), on command, most of the actuators
(relays and solenoids) that are controlled by the computer.
•
Use this test to check computer output voltages and
relay/solenoid operation.
NOTE:
The fuel injectors and fuel pump are not energized
during this test.
•
The Output Check Mode is activated immediately after
the Key On Engine Off (KOEO) Self Test is performed.
1.
Perform the Key On Engine Off (KOEO) Self Test,
steps 1 through 11 (refer to page 25 for procedures).
2.
Wait until the Code Reader retrieves all the KOEO Self
Test and Continuous Memory codes.
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The flashing square icon no longer appears on the
display when all the codes have been retrieved.
3.
Immediately after all Continuous Memory codes have
been retrieved, step on the accelerator pedal once, then
release. This activates the Output State Check and
energizes most of the actuators (relays and solenoids)
that are controlled by the vehicle's computer.
NOTE:
If your vehicle is equipped with an Integrated
Vehicle Speed Control, disconnect the vacuum supply hose
from the speed control servo before pressing the accelerator.
Reconnect vacuum hose after test.
■
The square icon will appear and stays on solid on the
right hand side of the code reader's display to indicate
that the Actuators are energized.
4.
To de-energize the actuators, press the accelerator pedal
once and release. The square will disappear, indicating
that the actuators are de-energized.
■
The procedure can be repeated as many times as
desired by pressing and releasing the accelerator
pedal to energize and de-energize the Actuators.
5.
Consult the vehicle's service manual for a list of all the
actuators (solenoids and relays) controlled by the
computer that apply to the vehicle under test, and which
actuators should energize and de-energize when
performing the "Output State Check". All applicable
actuators should be on when energized and off when de-
energized.
4