Mitsubishi FUSO FH 1997, Service Manual

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Measures for temporary faults
Temporary faults often occur under certain conditions. So identifying
those conditions helps to find possible causes. To find the conditions
under which temporary faults occurred, you need to reproduce the
faults after interviewing customers in detail about actual driving condi-
tions, weather, frequency of occurence and fault phenomena.
Then determine if the faults were caused by vibration, temperature or
other possible elements depending on the actual conditions identified.
If vibration is suspected as a possible cause, inspect individual con-
nectors as follows to check if the fault will occur:
• Shake the connector gently in all four directions of the arrows as
illustrated.
• Shake the wiring harness gently in all four directions of the arrows
as illustrated.
• Wiggle each sensor or piece of equipment by hand.
• Gently shake the wiring harnesses near movable parts such as
suspensions.
The inspection subjects include possible causes related to the diagno-
sis code outputs and faults, as well as the connectors and other parts
in the inspection procedure.
PRECAUTIONS FOR MAINTENANCE OPERATION