5130, 5130B and 5230 Excavators, 784B, 785B, 785C, 789B, 789C, 793B and 793C Off-Highway Truck/Tractors and 992G, 994 and 994D Wheel Loaders Vital Information Management System (VIMS) Caterpillar

The chip detectors are simple switches. The switch closes when enough particles of metal debris attach to the switch. The amount of debris and the electrical conductivity of the debris determines when a warning occurs. The operator will be warned when the chip detector resistance is approximately 500 ohms. The warning is deactivated when the resistance is approximately 2,000 ohms.

Perform the following chip detector circuit checks that are listed here:

Ensure that the resistance of the chip detector is greater than 10,000 ohms. Then check the harnesses for the same resistance. Disconnect the harness from the detector. At the VIMS interface module, measure the resistance from the signal circuit to ground and +battery. Resistance should always be greater than 10,000 ohms. If the resistance is less than 10,000 ohms repair the harness or replace the harness.

If the chip detector and the harness have signal resistance that is greater than 10,000 ohms and the warning is still present, replace the VIMS interface module. Refer to the Testing and Adjusting, "Module-Replace" section.