Equus 3120 - OBD 2&1 Tool Kit - Manual (Page 61)

OBD2 & 1 59
E
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS -RELAY AND SOLENOID TEST
11. If a cylinder is not contributing at the same level as the other cylin-
ders, the computer prompts you to repeat the test two more times
by displaying the “Lightly press the accelerator half way and
release” message again. Each time the message displays, perform
the procedures as instructed.
12. After the repeat Cylinder Balance tests
have completed, the computer will iden-
tify which cylinder (or cylinders) are not
contributing equally, and will send this
information to the Tool’s LCD display.
■ If any weak cylinders are identified,
consult the vehicle’s service repair
manual to perform further testing
and/or repairs.
Relay and Solenoid Test (Output State Check)
The "Output State Check" is a special program in the vehicle's com-
puter 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.
The fuel injectors and fuel pump are not energized during this
test. Check your vehicle thoroughly before performing any
test. See Before You Begin on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle.
Read and follow Safety Precautions on page 3 before per-
forming this test.
1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 46 for connector location.
Some DLCS have a plastic cover that must be removed
before connecting the Tool cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to the
vehicle's DLC. Press the POWER/LINK
button to turn the Tool ON, then
press the ENTER/FF button to con-
tinue.
■ The Ford EEC-IV System menu displays.