HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
GENERAL
00-15
HOW TO COPE WITH INTERMITTENT
MALFUNCTIONS
NOTE: If determining the cause is difficult, the flight
recorder function of the MUT-II/III can also be used.
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.
AC300901