
Fault Isolation Procedures
2-5
Power-Up Sequence Test
Power-Up Sequence Test
Step A Procedure Condition Action
Step B Procedure Condition Action
1. Before performing this test, the
Electrical Pretest must pass.
2. Clear area around sensor of objects.
3. Key on.
4. Observe the Operator
Display Unit.
1. Key on.
2. Disconnect sensor harness J2.
3. Key on.
4. Measure voltage
between sensor harness
J2 pins 1 and 2.
If both LED lights turn on
for .5 seconds – followed by
the red LED for 5 seconds –
followed by a continuous
yellow light
If lights fail to turn on
If lights turn on and stay on
If voltage is between 10
and 14 volts
If voltage is outside of
range
Test complete.
Go to Step B.
Go to Step D.
Go to Step C.
Repair harness. Go to Step V.
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