Chapter 15 Refrigeration System Diagnosis and Leak Detection 229
You may think of other questions depending on the
answers you get to these questions. Write down the driver’s
comments on an inspection form such as the one shown in
Figure 15-3. If an inspection form is not available, use the
back of the repair order or a sheet of paper. Before going on
to Step 2, make sure you have a good idea of the driver’s
complaint.
Assessing Driver Input
While taking into account what the driver says, try to esti-
mate his or her attitude and level of automotive knowledge.
Because drivers are not usually familiar with the operation
of automobiles, they often unintentionally mislead techni-
cians when describing symptoms or may have reached their
Figure 15-1. Strategy-based diagnostic fl owchart as recommended by one manufacturer. (Nissan)
Not self-diagnostic item
Self-diagnostic item
Self-diagnosis
CHECK IN
—WORK FLOW—
LISTEN TO CUSTOMER
COMPLAINTS
ELIMINATE GOOD SYSTEMS
OR GOOD PARTS
INVESTIGATE ITEMS YOU
SHOULD CARRY OUT
RELATED TO EACH
SYMPTOM AND NOTE
REPAIR REPAIR OR REPLACE
FINAL CHECK
CHECK OUT
DETERMINE MALFUNCTIONING
CIRCUIT(S) OR PART(S)
ELIMINATE GOOD PART(S),
HARNESS(ES) OR CONNECTOR(S)
THROUGH ELECTRICALLY
TESTING
INSPECTION ON THE BASE
OF EACH COMPONENT
Malfunctioning parts
Malfunctioning
harness(es) and
connector(s)
N.G.