TURBOCHARGER GP 4947641 - Caterpillar

Illustration 11 g01331502
Connector seals
(1) Seal
Ensure that the connector seals and the white sealing plugs are in place. If any of the seals or plugs are missing, replace the seal or plug. If necessary, replace the connector.
Check all of the wiring harnesses in order to verify that the harness does not make a sharp bend out of a connector. This will deform the connector seal and this will create a path for the entrance of moisture. Thoroughly inspect ECM connector J1/P1 and machine interface connectorJ20/P20 for evidence of moisture entry.Note: It is normal to see some minor seal abrasion on the ECM connector seals. Minor seal abrasion will not allow the entry of moisture.
If moisture or corrosion is evident in the connector, the source of the moisture entry must be identified and the source of the moisture entry must be repaired. If the source of the moisture entry is not repaired, the fault will reoccur. Drying the connector will not fix the fault. Likely paths for the entrance of moisture are in the following list:
Missing seals
Incorrectly installed seals
Nicks in exposed insulation
Incorrectly mated connectorsMoisture can also travel from one connector through the inside of a wire to the ECM connector. If moisture is found in the ECM connector, thoroughly check all connectors and wires on the harness that connect to the ECM. The ECM is not the source of the moisture. Do not replace an ECM if moisture is found in either ECM connector.Note: If corrosion 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 will damage the connector.Expected Result:All of the connectors should be completely coupled and all of the seals should be completely inserted. The harness and the wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the connectors and/or wiring, or replace the 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 fault by running the engine for several minutes and by checking again for moisture. If moisture reappears, the moisture may be contained within the insulation of the wiring. Replace any wires that may contain moisture inside the insulation. Verify that the repair eliminates the fault.If the repair has not eliminated the fault, proceed to Test Step 2.Test Step 2. Check Wires for Nicks and/or Abrasions in the Insulation
Carefully inspect each wire for signs of abrasion, nicks, or cuts. The following areas are locations that should be checked:
Exposed insulation
Points of rubbing wire against the engine
Points of rubbing wire against a sharp point
Check all of the hold down clamps for the harness in order to verify that the harness is correctly clamped. Also check all of the hold down clamps for the harness in order to verify that the harness is