HOUSING 9D0041 - Caterpillar

diagnostics for a system ECM can be accessed through the instrument cluster or the Cat® Electronic Technician (Cat ET) service tool.Reference: Troubleshooting a system requires additional information from the following machine manuals:
Testing and Adjusting
Troubleshooting
Electrical Schematic
Hydraulic Schematic
Parts Manual
Operation and Maintenance ManualAs a reference, a simplified electrical schematic is included at the end of this manual. For a detailed schematic, see the machine Electrical Schematic.When the troubleshooting procedure instructs you to “Repair or replace the harness”, use the machine Electrical Schematic to trace the circuit. Perform continuity checks at the harness connectors to locate harness failures. At the connectors of the components, check the ground circuit. There must be less than 5 ohms of resistance between a system ground and the frame ground. Ground resistance greater than 5 ohms can cause incorrect diagnosing of problems.During troubleshooting, inspect all connections before replacing a component. Connections that are not clean and tight can cause permanent, or intermittent electrical problems. Check that the wires are pushed into the connectors completely. Perform a 10 lb pull test on all wire connections.If wire insulation is punctured during troubleshooting, seal the damaged wires with 8T-0065 RTV Silicone Sealant. Cover the sealant with two layers of 1P-0810 Tape.Failure of an electrical component can cause and be caused by the failure of other components. Correct the cause of an electrical failure before replacing a component.When removing the harness from an ECM, use the single screw in the center of the harness connector.