Troubleshooting

RENR2696-01 145
Troubleshooting Section
C. If moisture or corrosion is evident in the connector,
thesourceofth
e moisture entry must be found
and the source of the moisture entry must be
repaired. If the source of the moisture entry is not
repaired, the
problem will reoccur. Simply drying
the connector will not fix the problem. Likely paths
for the entrance of moisture are in the following
list:
•
Missing seals
•
Improperly installed seals
•
Nicks in expo
sed insulation
•
Improperly mated connectors
Moisture can also travel from one connector
through the inside of a wire to the ECM connector.
If moisture i
s found in the ECM connector,
thoroughly check all connectors and wires on the
harness that connect to the ECM. The ECM is
not the sour
ce of the moisture. Do not replace an
ECM if moisture is found in either ECM connector.
Note: If cor
rosion is evident on the pins, sockets,or
the connectors, use only denatured alcohol to remove
the corrosion. Use a cotton swab or a soft brush to
remove the
corrosion. Do not use any cleaners that
contain trichloro-ethylene because trichloro-ethylene
may damage the connector.
Expected Result:
All of the c
onnectors should be completely coupled
and all of the seals should be completely inserted.
The harness and the wiring should be free of
corrosio
n, abrasion or pinch points.
Results:
•
OK – Proceed to Test Step 7.
•
Not OK
Repair: Repair the connectors and/or wiring, or
replace t
he connectors and/or wiring. Ensure that
all of the seals are properly in place and ensure
that the connectors are completely coupled.
Verify that the repair eliminates the problem by
running the engine for several minutes and by
checkin
g again for moisture. If moisture reappears
then the moisture may be contained within the
insulation of the wiring. Replace any wires that
may cont
ain moisture inside the insulation. Verify
that the repair eliminates the problem.
If the re
pair has not eliminated the fault proceed
to test step 7.
Test Step 7. Inspect the Connector
Terminals.
A. Verify that the terminals are not damaged.
Verify that the terminals are properly aligned in
the connector
and verify that the terminals are
properly located in the connector.
Expected Res
ult:
The terminals are properly aligned and the terminals
appear undam
aged.
Results:
•
OK – Proceed to Test Step 8.
•
Not OK – Repai
r the terminals and/or wiring, or
replace the terminals and/or wiring. If the repair
has not eliminated the fault proceed to test step 8.