Electrical Connector - Inspect
Intermittent electrical problems are often caused by poor connections. Use the following checks as a reference for inspecting connectors.
- Check the connection of the connectors.
- Ensure that the locking rings are properly locked.
- Ensure that locking clips are used on Sure Seal connectors.
- Ensure that the center of the connector is tight.
- Ensure that the connector pins and sockets align properly.
- Check the wires at the connector.
- Ensure that the wires are straight at the back of the connector.
- Ensure that each wire is properly crimped into the proper connector contact.
- Ensure that each connector contact is properly locked into the connector contact. When the connector contact is locked properly, the contact (wire) cannot be pulled out of the connector body without excessive force.
- Check each wire for nicks or signs of abrasion in the insulation.
- Check for moisture at the connector.
- Check for damaged connector seals or lost connector seals.
- Check for missing or loose wire hole plugs.
- Check for wires that do not enter the connector properly.
- If the wires enter the connector at an angle, there may not be a good seal between the connector and the wire insulation.
- Moisture can enter the connector through the wire insulation.
- Check for dirty contacts or corroded contacts.
- Clean contacts with a cotton swab or a soft brush and denatured alcohol ONLY.
- Check each pin and each socket.
- Check each contact of the connector for a snug fit by using a new pin and socket. The new contact should stay connected if the connector is held with the contacts that are facing down.
Caterpillar Information System:
EMCP4.1/EMCP4.2 Wiring Harness (Open Circuit) - Test
EMCP4.1/EMCP4.2 Wiring Harness (Short Circuit) - Test
EMCP4.1/EMCP4.2 Diagnostic Capabilities
EMCP4.1/EMCP4.2 Diagnostic Trouble Code List
EMCP4.1/EMCP4.2 Engine Cooldown Warning
EMCP4.1/EMCP4.2 Engine Overcrank Warning
EMCP4.1/EMCP4.2 Engine Overspeed Warning
EMCP4.1/EMCP4.2 Engine Speed Warning
EMCP4.1/EMCP4.2 Engine Underspeed Warning
EMCP4.1/EMCP4.2 Generator Control Not in Automatic Warning
EMCP4.1/EMCP4.2 Generator Output Sensing Circuit Fault
EMCP4.1/EMCP4.2 Generator Overcurrent Warning
Transmission Reuse and Salvage Manual Contents {0374, 3030} Transmission Reuse and Salvage Manual Contents {0374, 3030}
349F and 352F Excavators Engine Oil Level - Check
EMCP4.1/EMCP4.2 Electronic Control Module (Generator Set) - Replace
EMCP4.1/EMCP4.2 Engine Setpoint Verification - Test
EMCP4.1/EMCP4.2 Speed Sensor (Engine) - Adjust
EMCP4.1/EMCP4.2 External Potential Transformer Connections
C175-16 Marine Engines Speed Sensor - Clean/Inspect
EMCP4.1/EMCP4.2 Engine Speed Timing Calibration - Setup
349F and 352F Excavators Fumes Disposal Filter Element - Replace - If Equipped
EMCP4.1/EMCP4.2 System Operation
EMCP4.1/EMCP4.2 Event Viewing
EMCP4.1/EMCP4.2 Voltage and Frequency Adjustment