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

Illustration 1	g00730054
Schematic of the Payload Lamps

This diagnostic code is recorded when the VIMS module reads the current of the payload lamp and the current is below normal. The green payload lamp does not light when this failure is present.

1. CHECK THE LAMP.

   1. At the green payload lamp, use a jumper to connect wire 636-GN(Green) to frame ground.

      Expected Result: The diagnostic code CID 0824 FMI 05 is active.

      Results:

      • OK - The diagnostic code remains active. The green payload lamp is not causing the failure. Proceed to 2.

      • NOT OK - The diagnostic code is NO longer active. The lamp or the lamp socket is open. Replace the green payload lamp. For the purposes of this procedure, the correct resistance for a lamp is less than 200 ohms. STOP.

2. CHECK THE HARNESS.

   1. Turn the key start switch and the disconnect switch to the OFF position.

   2. Remove the jumper wire between wire 636-GN(Green) and frame ground. Verify that the green payload lamp is connected to the machine harness.

   3. Disconnect the machine harness from the VIMS main module.

   4. At the machine harness connector for the VIMS main module, measure the resistance between contact 22 (636-GN(Green)) and frame ground.

      Expected Result: The resistance is greater than 100 ohms.

      Results:

      • OK - The resistance is greater than 100 ohms. The harness circuit is open. Proceed to 3.

      • NOT OK - The resistance is less than 100 ohms. The harness circuit resistance is correct. Replace the VIMS main module. Refer to the Testing and Adjusting, "Module - Replace" section. STOP.

3. CHECK THE HARNESS.

   1. At the green payload lamp, disconnect wire 636-GN(Green) from the green payload lamp socket.

   2. Measure the resistance between contact 22 of the VIMS module harness connector and the lamp socket.

   3. Measure the resistance between the lamp socket and the frame ground.

      Expected Result: The resistance measurements were less than 5 ohms.

      Results:

      • OK - The resistance is less than 5 ohms. The circuit is correct. STOP.

      • NOT OK - The resistance is greater than 5 ohms. The Circuit is NOT correct. Repair the machine harness or replace the machine harness. STOP.