HOOD AS 4S8825 - Caterpillar

Table 1
Troubleshooting Quick Reference    
Proceed To Testing And Adjusting, "Troubleshooting Diagnostic Codes" For Faults Related To:    
Action Alarm - CID 0271 Procedure    
CAT data link - CID 0248 Procedure    
Gauges - CID 0100, CID 0102, CID 0110, CID 0172, CID 0175, CID 0263, CID 0460, CID 0827, CID 0828    
Go To Testing And Adjusting, "Troubleshooting Undiagnosed Problems" For:    
Indicator Faults - Alert Indicator Always Flashing Procedure    
Indicator Faults - Alert Indicator Never Flashes Procedure    Troubleshooting the Caterpillar Monitoring System requires additional information from the Engine Service Manual. The Electrical System Schematic, Electronic Troubleshooting Guide, Parts Manual, and the Operation And Maintenance Manual are required support material.For reference, a typical schematic is included at the end of this manual. For an accurate representation of the engine that is being diagnosed, see the Electrical System Schematic that is located in the Engine Service Manual.When the troubleshooting procedure instructs the operator to REPAIR THE HARNESS, use the Electrical System Schematic in the Engine Service Manual to trace the circuit. To locate failures in the harness, the operator should perform continuity checks at the connectors. At component connectors, always check the ground circuit. Less than five ohms of resistance is required between the ground contacts of the connector and battery ground. Ground resistance that is greater than five ohms can cause incorrect diagnosing of problems.During troubleshooting, inspect all component and harness connections before any component is replaced. If these connections are not clean and tight the connections can cause electrical problems. The problems may be permanent or intermittent. Check that the wires are pushed into the connectors completely. The operator should verify that the connections are tight.Failure of one or more electrical components can cause the failure of other components. Before replacing a component, the operator should attempt to find the cause of the failure. Also, the operator should attempt to correct the cause of the electrical system fault.