Cat® Grade Control Cross Slope System for Motor Graders Caterpillar

Diagnostic codes will appear on the display when errors occur and the system is in operation. More information on errors and diagnostic codes can be obtained with the help of the display and Cat^® Electronic Technician (Cat ET). Troubleshooting the system may require additional information from the following manuals:

• Electrical System Schematic

• Hydraulic System Schematic

• Operation and Maintenance Manual

Perform continuity checks at the harness connectors to locate harness failures. At the connectors of the components, always check the ground circuit. There must be less than five ohms of resistance between any system ground and the frame ground. Excessive ground resistance that is greater than five ohms can cause incorrect diagnosing of problems.

During troubleshooting, inspect all connections before any component is replaced. If these connections are not clean and tight, permanent electrical problems or intermittent electrical problems can result. Check that the wires are pushed into the connectors completely. Ensure that the connections are tight before other tests are made.

Failure of an electrical component can cause the failure of other components. Also, failure of an electrical component can be caused by the failure of other components. Always attempt to correct the cause of an electrical system failure before you replace a component.