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Intermittent malfunctions often
occur under certain conditions, and if these conditions can
be ascertained, determining the cause becomes simple. In
order to ascertain the conditions under which an
intermittent malfunction occurs, first ask the customer for
details about the driving conditions, weather conditions,
frequency of occurrence and trouble symptoms, and then try
to recreate the trouble symptoms. Next, ascertain whether
the reason why the trouble symptom occurred under these
conditions is due to vibration, temperature or some other
factor. If vibration is thought to be the cause, carry out
the following checks with the connectors and components to
confirm whether the trouble symptom occurs. The objects to
be checked are connectors and components which are indicated
by inspection procedures or given as probable causes (which
generates diagnosis codes or trouble
symptoms).
- Gently shake the connector up, down and to the left
and right.
- Gently shake the wiring harness up, down and to the
left and right.
- Gently rock each sensor and relay, etc. by
hand.
- Gently shake the wiring harness at suspensions and
other moving parts.
note |
If determining the cause is
difficult, the drive recorder function of the
M.U.T.-III can also be used. (For details on how
to use the M.U.T.-III, refer to the "M.U.T.-III
Owner’s Manual).
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