HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
GENERAL
00-13
HOW TO COPE WITH INTERMITTENT
MALFUNCTIONS
M1001013900020
AC300901
Intermittent malfunctions often occur under certain
conditions, and if these conditions can be ascer-
tained, determining the cause becomes simple. In
order to ascertain the conditions under which an
intermittent malfunction occurs, first ask the cus-
tomer for details about the driving conditions,
weather conditions, frequency of occurrence and
trouble symptoms, and then try to recreate the trou-
ble symptoms. Next, ascertain whether the reason
why the trouble symptom occurred under these con-
ditions 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 gen-
erates 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 operation manual).
HOW TO TREAT PAST TROUBLE
M1001014100027
Since the trouble may still be present even the status
is "Stored", set the vehicle to the diagnosis code
detection condition and check that the status
changes to "Active". If the status does not change
from "Stored", carry out the following procedure.
1. Establish from the customer whether a fuse or
connector has been replaced or disconnected.
2. If yes, erase the diagnosis code, and then check
that no diagnostic code is reset. If no diagnosis
code is reset, the diagnosis is complete.
3. If no, follow the applicable Diagnostic Trouble
Code Chart. Then check the wiring harness and
connector, and refer to "How to Cope with
Intermittent Malfunction
P.00-13
."
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