Suzuki 2007 XL7, Руководство по обслуживанию

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9A-160 Wiring Systems:
Testing for Electrical Intermittents
Special tool
J 39200 Digital Multimeter
Perform the following procedures while wiggling the
harness from side to side. Continue this at convenient
points (about 6 inches apart) while watching the test
equipment.
• “Testing for Short to Ground”
• “Testing for Continuity”
• “Testing for a Short to Voltage”
If the fault is not identified, perform the procedure below
using the MIN MAX feature on the J 39200 DMM. This
feature allows you to manipulate the circuit without
having to watch the J 39200. The J 39200 will generate
an audible tone when a change is detected.
NOTE
The J 39200 must be used in order to perform
the following procedure since the J 39200
can monitor current, resistance or voltage
while recording the minimum (MIN), and
maximum (MAX) values measured.
1. Connect the J 39200 to both sides of a suspected
connector (still connected), or from one end of a
suspected circuit to the other. Refer to
“Troubleshooting with a Digital Multimeter” for
information on connecting the J 39200 to the circuit.
2. Set the rotary dial of the J 39200 to the V (AC) or V
(DC) position.
3. Press the range button of the J 39200 in order to
select the desired voltage range.
4. Press the MIN MAX button of the J 39200. The J
39200 displays 100 ms RECORD and emits an
audible tone (beep).
NOTE
The 100 ms RECORD mode is the length of
time an input must stay at a new value in
order to record the full change.
5. Simulate the condition that is potentially causing the
intermittent connection, either by wiggling the
connections or the wiring, test driving, or performing
other operations. Refer to “Inducing Intermittent
Fault Conditions”.
6. Listen for the audible Min Max Alert which indicates
that a new minimum or maximum value has been
recorded.
7. Press the MIN MAX button once in order to display
the MAX value and note the value.
8. Press the MIN MAX button again in order to display
the MIN value and note the value.
9. Determine the difference between the MIN and MAX
values.
– If the variation between the recorded MIN and
MAX voltage values is 1 volt or greater an
intermittent open or high resistance condition
exists. Repair the condition as necessary.
– If the variation between the recorded MIN and
MAX voltage values is less than 1 volt an
intermittent open or high resistance condition
does not exist.
Scan Tool Snapshot Procedure
Snapshot is a recording of what a control module on the
vehicle was receiving for information while the snapshot
is being made. A snapshot may be used to analyze the
data during the time a vehicle condition is current. This
allows you to concentrate on making the condition occur,
rather than trying to view all the data in anticipation of the
fault. The snapshot contains information around a trigger
point that you have determined. Only a single data list
may be recorded in each snapshot. The Scan Tool has
the ability to store 2 snapshots. The ability to record 2
snapshots allows comparing hot versus cold and good
versus bad vehicle scenarios. The snapshots are stored
on a first-in, first-out basis. If a third snapshot is taken,
the first snapshot stored in the memory will be lost.
Snapshots can be 1 of 2 types:
• Snapshot - taken from the Snapshot menu choice
• Quick Snapshot - taken from the Data Display soft key
choice, does not contain DTC information
When a snapshot is taken, it is recorded on the memory
card and may contain as many as 1200 frames of
information. Because the snapshot is recorded onto the
memory card, snapshots are not lost if the Scan Tool is
powered down.
The snapshot replay screen has a plot soft key that can
be of great value for intermittent diagnosis. The
snapshot plot feature can help you to quickly determine
if a sensor is outside of its expected values by plotting 3
parameters at a time. The data will be displayed both
graphically and numerically showing the minimum and
maximum values for all frames captured. This is helpful,
especially if the fault occurs only once and does not set
a DTC.