Equus 3120 - OBD 2&1 Tool Kit - Manual (Page 63)

OBD2 & 1 61
E
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS -WIGGLE TEST
BE SURE to perform the added procedures in step 6,
if appropriate for your vehicle, BEFORE turning the
ignition ON.
- Press ENTER/FF button to continue.
9. If the Tool was able to link to the vehicle
successfully an "Output State check
active..." message shows temporarily on
the Tool's LCD display. This message is
followed by a display that instructs you
how to perform the test.
10. Press 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.
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.
11. To de-energize the actuators, press the accelerator pedal again and
release, the actuators are now de-energized.
12. The procedure can be repeated as many times as desired by press-
ing and releasing the accelerator pedal to energize and de-energize
the actuators.
13. Consult the vehicle's service repair manual for a list of 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.
14. If an actuator is not responding to the Output State Check, follow
the procedures described in the vehicle's service manual to check
computer actuator output circuit voltages and/or grounds.
15. The Output State Check will stay active as long as desired. To quit
the Output State Check, turn the ignition OFF and disconnect the
Tool from the vehicle.
Wiggle Test
Since any DTC’s from Wiggle Test results are saved in
Continuous Memory, it is suggested that you clear any DTC’s
in Continuous Memory before performing Wiggle Test (see
Erasing DTC’s on page 80 for procedures). This way you start
with a clean slate, and any faults detected during the proce-
dure will be related to that particular circuit tested.
Use this test to check for intermittent faults in some circuits.